Added basic implementation of rst tree. Now TODO main part - T9 dictionary for 0-9 mapping.
parent
50cc9b8f5b
commit
39e5abc769
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@ -0,0 +1,18 @@
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plugins {
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id 'java'
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}
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repositories {
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mavenCentral()
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}
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dependencies {
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implementation('ch.qos.logback:logback-classic:1.5.15')
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}
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tasks.register('runDefault', JavaExec) {
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classpath = sourceSets.main.runtimeClasspath
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mainClass = 'pl.polgrabia.demos.crackingcodeinterview.t16x20.Program'
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args "${System.getenv('LOCALAPPDATA')}/cracking_code_interview/t16x20/words.txt"
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jvmArgs "-ea"
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}
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Binary file not shown.
7
2025/01/cracking_code_interview_16_20_t9/gradle/wrapper/gradle-wrapper.properties
vendored
Normal file
7
2025/01/cracking_code_interview_16_20_t9/gradle/wrapper/gradle-wrapper.properties
vendored
Normal file
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@ -0,0 +1,7 @@
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distributionBase=GRADLE_USER_HOME
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distributionPath=wrapper/dists
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distributionUrl=https\://services.gradle.org/distributions/gradle-8.10-bin.zip
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networkTimeout=10000
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validateDistributionUrl=true
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zipStoreBase=GRADLE_USER_HOME
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zipStorePath=wrapper/dists
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@ -0,0 +1,252 @@
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#!/bin/sh
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#
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# Copyright © 2015-2021 the original authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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##############################################################################
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#
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# Gradle start up script for POSIX generated by Gradle.
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#
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# Important for running:
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#
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# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
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# noncompliant, but you have some other compliant shell such as ksh or
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# bash, then to run this script, type that shell name before the whole
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# command line, like:
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#
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# ksh Gradle
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#
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# Busybox and similar reduced shells will NOT work, because this script
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# requires all of these POSIX shell features:
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# * functions;
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# * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
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# «${var#prefix}», «${var%suffix}», and «$( cmd )»;
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# * compound commands having a testable exit status, especially «case»;
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# * various built-in commands including «command», «set», and «ulimit».
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#
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# Important for patching:
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#
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||||
# (2) This script targets any POSIX shell, so it avoids extensions provided
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# by Bash, Ksh, etc; in particular arrays are avoided.
|
||||
#
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||||
# The "traditional" practice of packing multiple parameters into a
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# space-separated string is a well documented source of bugs and security
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# problems, so this is (mostly) avoided, by progressively accumulating
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# options in "$@", and eventually passing that to Java.
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#
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# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
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# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
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# see the in-line comments for details.
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#
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# There are tweaks for specific operating systems such as AIX, CygWin,
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# Darwin, MinGW, and NonStop.
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#
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# (3) This script is generated from the Groovy template
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# https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
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# within the Gradle project.
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#
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# You can find Gradle at https://github.com/gradle/gradle/.
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#
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##############################################################################
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# Attempt to set APP_HOME
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# Resolve links: $0 may be a link
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app_path=$0
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# Need this for daisy-chained symlinks.
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while
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APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path
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[ -h "$app_path" ]
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do
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ls=$( ls -ld "$app_path" )
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link=${ls#*' -> '}
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case $link in #(
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/*) app_path=$link ;; #(
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*) app_path=$APP_HOME$link ;;
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esac
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done
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# This is normally unused
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# shellcheck disable=SC2034
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APP_BASE_NAME=${0##*/}
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# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
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APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
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' "$PWD" ) || exit
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|
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# Use the maximum available, or set MAX_FD != -1 to use that value.
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MAX_FD=maximum
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warn () {
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echo "$*"
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} >&2
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die () {
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echo
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echo "$*"
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echo
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exit 1
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} >&2
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# OS specific support (must be 'true' or 'false').
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cygwin=false
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msys=false
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darwin=false
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nonstop=false
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case "$( uname )" in #(
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CYGWIN* ) cygwin=true ;; #(
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Darwin* ) darwin=true ;; #(
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MSYS* | MINGW* ) msys=true ;; #(
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NONSTOP* ) nonstop=true ;;
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esac
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CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
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# Determine the Java command to use to start the JVM.
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if [ -n "$JAVA_HOME" ] ; then
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if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
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# IBM's JDK on AIX uses strange locations for the executables
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JAVACMD=$JAVA_HOME/jre/sh/java
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else
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JAVACMD=$JAVA_HOME/bin/java
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fi
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if [ ! -x "$JAVACMD" ] ; then
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die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
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Please set the JAVA_HOME variable in your environment to match the
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location of your Java installation."
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fi
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else
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JAVACMD=java
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if ! command -v java >/dev/null 2>&1
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then
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die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
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Please set the JAVA_HOME variable in your environment to match the
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location of your Java installation."
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fi
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fi
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# Increase the maximum file descriptors if we can.
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if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
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case $MAX_FD in #(
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max*)
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# In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
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# shellcheck disable=SC2039,SC3045
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MAX_FD=$( ulimit -H -n ) ||
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warn "Could not query maximum file descriptor limit"
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esac
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case $MAX_FD in #(
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'' | soft) :;; #(
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*)
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# In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
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# shellcheck disable=SC2039,SC3045
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ulimit -n "$MAX_FD" ||
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warn "Could not set maximum file descriptor limit to $MAX_FD"
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esac
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fi
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# Collect all arguments for the java command, stacking in reverse order:
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# * args from the command line
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# * the main class name
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# * -classpath
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# * -D...appname settings
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# * --module-path (only if needed)
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# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
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# For Cygwin or MSYS, switch paths to Windows format before running java
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if "$cygwin" || "$msys" ; then
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APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
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CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
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JAVACMD=$( cygpath --unix "$JAVACMD" )
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# Now convert the arguments - kludge to limit ourselves to /bin/sh
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for arg do
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if
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case $arg in #(
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-*) false ;; # don't mess with options #(
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/?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath
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[ -e "$t" ] ;; #(
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*) false ;;
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esac
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then
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arg=$( cygpath --path --ignore --mixed "$arg" )
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fi
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# Roll the args list around exactly as many times as the number of
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# args, so each arg winds up back in the position where it started, but
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# possibly modified.
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#
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# NB: a `for` loop captures its iteration list before it begins, so
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# changing the positional parameters here affects neither the number of
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# iterations, nor the values presented in `arg`.
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shift # remove old arg
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set -- "$@" "$arg" # push replacement arg
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done
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fi
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# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
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DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
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# Collect all arguments for the java command:
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# * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
|
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# and any embedded shellness will be escaped.
|
||||
# * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
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||||
# treated as '${Hostname}' itself on the command line.
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set -- \
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"-Dorg.gradle.appname=$APP_BASE_NAME" \
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-classpath "$CLASSPATH" \
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org.gradle.wrapper.GradleWrapperMain \
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"$@"
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||||
# Stop when "xargs" is not available.
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||||
if ! command -v xargs >/dev/null 2>&1
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||||
then
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||||
die "xargs is not available"
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||||
fi
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||||
|
||||
# Use "xargs" to parse quoted args.
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||||
#
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||||
# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
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||||
#
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||||
# In Bash we could simply go:
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||||
#
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||||
# readarray ARGS < <( xargs -n1 <<<"$var" ) &&
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# set -- "${ARGS[@]}" "$@"
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||||
#
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||||
# but POSIX shell has neither arrays nor command substitution, so instead we
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||||
# post-process each arg (as a line of input to sed) to backslash-escape any
|
||||
# character that might be a shell metacharacter, then use eval to reverse
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||||
# that process (while maintaining the separation between arguments), and wrap
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||||
# the whole thing up as a single "set" statement.
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||||
#
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||||
# This will of course break if any of these variables contains a newline or
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# an unmatched quote.
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#
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eval "set -- $(
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printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
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||||
xargs -n1 |
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sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
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tr '\n' ' '
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||||
)" '"$@"'
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||||
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exec "$JAVACMD" "$@"
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@ -0,0 +1,94 @@
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@rem
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@rem Copyright 2015 the original author or authors.
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||||
@rem
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||||
@rem Licensed under the Apache License, Version 2.0 (the "License");
|
||||
@rem you may not use this file except in compliance with the License.
|
||||
@rem You may obtain a copy of the License at
|
||||
@rem
|
||||
@rem https://www.apache.org/licenses/LICENSE-2.0
|
||||
@rem
|
||||
@rem Unless required by applicable law or agreed to in writing, software
|
||||
@rem distributed under the License is distributed on an "AS IS" BASIS,
|
||||
@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
@rem See the License for the specific language governing permissions and
|
||||
@rem limitations under the License.
|
||||
@rem
|
||||
@rem SPDX-License-Identifier: Apache-2.0
|
||||
@rem
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||||
|
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@if "%DEBUG%"=="" @echo off
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@rem ##########################################################################
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@rem
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||||
@rem Gradle startup script for Windows
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||||
@rem
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||||
@rem ##########################################################################
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||||
|
||||
@rem Set local scope for the variables with windows NT shell
|
||||
if "%OS%"=="Windows_NT" setlocal
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||||
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||||
set DIRNAME=%~dp0
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||||
if "%DIRNAME%"=="" set DIRNAME=.
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||||
@rem This is normally unused
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||||
set APP_BASE_NAME=%~n0
|
||||
set APP_HOME=%DIRNAME%
|
||||
|
||||
@rem Resolve any "." and ".." in APP_HOME to make it shorter.
|
||||
for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
|
||||
|
||||
@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
|
||||
set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
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||||
|
||||
@rem Find java.exe
|
||||
if defined JAVA_HOME goto findJavaFromJavaHome
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||||
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||||
set JAVA_EXE=java.exe
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%JAVA_EXE% -version >NUL 2>&1
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||||
if %ERRORLEVEL% equ 0 goto execute
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||||
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||||
echo. 1>&2
|
||||
echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
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echo. 1>&2
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||||
echo Please set the JAVA_HOME variable in your environment to match the 1>&2
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echo location of your Java installation. 1>&2
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||||
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||||
goto fail
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||||
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||||
:findJavaFromJavaHome
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set JAVA_HOME=%JAVA_HOME:"=%
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set JAVA_EXE=%JAVA_HOME%/bin/java.exe
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||||
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||||
if exist "%JAVA_EXE%" goto execute
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||||
|
||||
echo. 1>&2
|
||||
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
|
||||
echo. 1>&2
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||||
echo Please set the JAVA_HOME variable in your environment to match the 1>&2
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||||
echo location of your Java installation. 1>&2
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||||
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||||
goto fail
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||||
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||||
:execute
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||||
@rem Setup the command line
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||||
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||||
set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
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||||
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||||
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||||
@rem Execute Gradle
|
||||
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
|
||||
|
||||
:end
|
||||
@rem End local scope for the variables with windows NT shell
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||||
if %ERRORLEVEL% equ 0 goto mainEnd
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||||
|
||||
:fail
|
||||
rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
|
||||
rem the _cmd.exe /c_ return code!
|
||||
set EXIT_CODE=%ERRORLEVEL%
|
||||
if %EXIT_CODE% equ 0 set EXIT_CODE=1
|
||||
if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
|
||||
exit /b %EXIT_CODE%
|
||||
|
||||
:mainEnd
|
||||
if "%OS%"=="Windows_NT" endlocal
|
||||
|
||||
:omega
|
||||
|
|
@ -0,0 +1,27 @@
|
|||
package pl.polgrabia.demos.crackingcodeinterview.t16x20;
|
||||
|
||||
import org.slf4j.Logger;
|
||||
import org.slf4j.LoggerFactory;
|
||||
|
||||
import java.nio.file.Paths;
|
||||
|
||||
public class Program {
|
||||
private static final Logger logger = LoggerFactory.getLogger(Program.class);
|
||||
public static void main(String[] args) {
|
||||
if (args.length != 1) {
|
||||
logger.error("Usage: java Program <dictionary_path>");
|
||||
System.exit(1);
|
||||
return;
|
||||
}
|
||||
|
||||
var wordDictionaryPath = args[0];
|
||||
var rstTree = new RstTreeLoader(Paths.get(wordDictionaryPath)).load();
|
||||
// test for rst tree
|
||||
// String w = "abadia"; // exists
|
||||
// String w = "asdadsadadlosdaladsad"; // doesn't exists
|
||||
// String w = "abcdefg"; // doesn't exists
|
||||
// logger.info("Looking for word: {} - {}", w, rstTree.contains(w));
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
|
@ -0,0 +1,90 @@
|
|||
package pl.polgrabia.demos.crackingcodeinterview.t16x20;
|
||||
|
||||
import org.slf4j.Logger;
|
||||
import org.slf4j.LoggerFactory;
|
||||
|
||||
import java.util.ArrayList;
|
||||
|
||||
public class RstTree {
|
||||
private static final Logger logger = LoggerFactory.getLogger(RstTree.class);
|
||||
private static final Logger log = LoggerFactory.getLogger(RstTree.class);
|
||||
private RstTreeNode rstTreeNode;
|
||||
|
||||
public void add(String word) {
|
||||
assert word != null : "word must not be null";
|
||||
assert !word.isBlank() : "word must not be blank";
|
||||
assert word.matches("^[a-z]+$") : "word '" + word + "' must contain only small letters";
|
||||
if (rstTreeNode == null) {
|
||||
rstTreeNode = new RstTreeNode();
|
||||
rstTreeNode.setPrefix("");
|
||||
rstTreeNode.setValue(word);
|
||||
} else {
|
||||
addInternal(rstTreeNode, word);
|
||||
}
|
||||
}
|
||||
|
||||
private static boolean addInternal(RstTreeNode node, String word) {
|
||||
if (word.equals(node.getValue())) {
|
||||
// already added
|
||||
return false;
|
||||
}
|
||||
|
||||
assert word.startsWith(node.getPrefix()) : "word must start with prefix";
|
||||
int prefixLength = node.getPrefix().length();
|
||||
if (prefixLength >= word.length()) {
|
||||
String oldValue = node.getValue();
|
||||
node.setValue(word);
|
||||
boolean added = addInternal(node, oldValue);
|
||||
if (!added) {
|
||||
node.setValue(oldValue);
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
char c = word.charAt(prefixLength);
|
||||
int offset = c - 'a';
|
||||
assert offset >= 0 && offset < RstTreeNode.EN_ALPHABET_LETTER_COUNT : "It's an offset for possible prefix child item - max alphabet";
|
||||
// logger.info("Word: {}, prefix: {}, index: {}, c: {}, offset: {}", word, node.getPrefix(), node.getPrefix().length(), c, offset);
|
||||
var childItem = node.getRstChildren().length <= offset ? null : node.getRstChildren()[offset];
|
||||
if (childItem == null) {
|
||||
childItem = new RstTreeNode();
|
||||
childItem.setPrefix(word.substring(0, prefixLength + 1));
|
||||
childItem.setValue(word);
|
||||
node.getRstChildren()[offset] = childItem;
|
||||
return true;
|
||||
} else {
|
||||
return addInternal(childItem, word);
|
||||
}
|
||||
}
|
||||
|
||||
public boolean contains(String word) {
|
||||
assert word != null : "word must not be null";
|
||||
assert !word.isBlank() : "word must not be blank";
|
||||
assert word.matches("^[a-z]+$") : "word '" + word + "' must contain only small letters";
|
||||
|
||||
return containsInternal(rstTreeNode, word);
|
||||
}
|
||||
|
||||
private boolean containsInternal(RstTreeNode node, String word) {
|
||||
if (node == null) {
|
||||
return false;
|
||||
}
|
||||
|
||||
logger.info("Node value: {}, prefix: {}, word: {}", node.getValue(), node.getPrefix(), word);
|
||||
|
||||
assert word.startsWith(node.getPrefix()) : "word " + word + "must start with prefix: " + node.getPrefix();
|
||||
|
||||
if (word.equals(node.getValue())) {
|
||||
return true;
|
||||
}
|
||||
|
||||
char c = word.charAt(node.getPrefix().length());
|
||||
int offset = c - 'a';
|
||||
assert offset >= 0 && offset < RstTreeNode.EN_ALPHABET_LETTER_COUNT : "It's an offset for possible prefix child item - max alphabet";
|
||||
// logger.info("Word: {}, prefix: {}, index: {}, c: {}, offset: {}", word, node.getPrefix(), node.getPrefix().length(), c, offset);
|
||||
var childItem = node.getRstChildren().length <= offset ? null : node.getRstChildren()[offset];
|
||||
logger.info("Childitem: {}, c: {}, offset: {}", childItem, c, offset);
|
||||
return containsInternal(childItem, word);
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,53 @@
|
|||
package pl.polgrabia.demos.crackingcodeinterview.t16x20;
|
||||
|
||||
import org.slf4j.Logger;
|
||||
import org.slf4j.LoggerFactory;
|
||||
|
||||
import java.io.BufferedReader;
|
||||
import java.io.FileInputStream;
|
||||
import java.io.IOException;
|
||||
import java.io.InputStreamReader;
|
||||
import java.nio.file.Path;
|
||||
import java.util.Locale;
|
||||
|
||||
public class RstTreeLoader {
|
||||
private static final Logger logger = LoggerFactory.getLogger(RstTreeLoader.class);
|
||||
private final Path path;
|
||||
private RstTreeNode rstTree;
|
||||
private int counterBad = 0;
|
||||
private int counterProcessed = 0;
|
||||
|
||||
public RstTreeLoader(Path path) {
|
||||
this.path = path;
|
||||
}
|
||||
|
||||
public RstTree load() {
|
||||
var rstTree = new RstTree();
|
||||
try (BufferedReader br = new BufferedReader(
|
||||
new InputStreamReader(
|
||||
new FileInputStream(path.toFile())))) {
|
||||
String line;
|
||||
while ((line = br.readLine()) != null) {
|
||||
processLine(rstTree, line);
|
||||
}
|
||||
logger.info("Processed {} lines, bad ones: {}", counterProcessed, counterBad);
|
||||
return rstTree;
|
||||
} catch (IOException e) {
|
||||
throw new IllegalStateException(
|
||||
"Unable to load word dictionary from path: "
|
||||
+ path, e);
|
||||
}
|
||||
}
|
||||
|
||||
private void processLine(RstTree rstTree, String line) {
|
||||
String lowerCasedLine = line.trim()
|
||||
.toLowerCase(Locale.ENGLISH);
|
||||
if (!lowerCasedLine
|
||||
.matches("^[a-z]+$")) {
|
||||
counterBad++;
|
||||
} else {
|
||||
rstTree.add(lowerCasedLine);
|
||||
}
|
||||
counterProcessed++;
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,46 @@
|
|||
package pl.polgrabia.demos.crackingcodeinterview.t16x20;
|
||||
|
||||
import java.util.ArrayList;
|
||||
import java.util.List;
|
||||
|
||||
public class RstTreeNode {
|
||||
public static final int EN_ALPHABET_LETTER_COUNT = 26;
|
||||
private String prefix;
|
||||
private String value;
|
||||
private RstTreeNode[] rstChildren;
|
||||
|
||||
RstTreeNode() {
|
||||
rstChildren = new RstTreeNode[EN_ALPHABET_LETTER_COUNT];
|
||||
}
|
||||
|
||||
public String getPrefix() {
|
||||
return prefix;
|
||||
}
|
||||
|
||||
public void setPrefix(String prefix) {
|
||||
this.prefix = prefix;
|
||||
}
|
||||
|
||||
public String getValue() {
|
||||
return value;
|
||||
}
|
||||
|
||||
public void setValue(String value) {
|
||||
this.value = value;
|
||||
}
|
||||
|
||||
public RstTreeNode[] getRstChildren() {
|
||||
return rstChildren;
|
||||
}
|
||||
|
||||
public void setRstChildren(RstTreeNode[] rstChildren) {
|
||||
this.rstChildren = rstChildren;
|
||||
}
|
||||
|
||||
@Override
|
||||
public String toString() {
|
||||
return "RSTTreeNode{" +
|
||||
"value='" + value + '\'' +
|
||||
'}';
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,13 @@
|
|||
<?xml version="1.0" encoding="UTF-8" ?>
|
||||
<configuration>
|
||||
|
||||
<appender class="ch.qos.logback.core.ConsoleAppender" name="console">
|
||||
<encoder>
|
||||
<pattern>%d{HH:mm::ss.SSS[Z]} %level %logger{36} %msg%n</pattern>
|
||||
</encoder>
|
||||
</appender>
|
||||
|
||||
<root level="INFO">
|
||||
<appender-ref ref="console" />
|
||||
</root>
|
||||
</configuration>
|
||||
Loading…
Reference in New Issue