diff --git a/config.json b/config.json index c5763bd0..89cfbc0c 100644 --- a/config.json +++ b/config.json @@ -821,6 +821,14 @@ "practices": [], "prerequisites": [], "difficulty": 2 + }, + { + "slug": "sieve", + "name": "Sieve", + "uuid": "b107acf8-0f1c-4d20-8188-aa594836befd", + "practices": [], + "prerequisites": [], + "difficulty": 2 } ] }, diff --git a/exercises/practice/sieve/.docs/instructions.md b/exercises/practice/sieve/.docs/instructions.md new file mode 100644 index 00000000..3adf1d55 --- /dev/null +++ b/exercises/practice/sieve/.docs/instructions.md @@ -0,0 +1,28 @@ +# Instructions + +Your task is to create a program that implements the Sieve of Eratosthenes algorithm to find prime numbers. + +A prime number is a number that is only divisible by 1 and itself. +For example, 2, 3, 5, 7, 11, and 13 are prime numbers. + +The Sieve of Eratosthenes is an ancient algorithm that works by taking a list of numbers and crossing out all the numbers that aren't prime. + +A number that is **not** prime is called a "composite number". + +To use the Sieve of Eratosthenes, you first create a list of all the numbers between 2 and your given number. +Then you repeat the following steps: + +1. Find the next unmarked number in your list. This is a prime number. +2. Mark all the multiples of that prime number as composite (not prime). + +You keep repeating these steps until you've gone through every number in your list. +At the end, all the unmarked numbers are prime. + +~~~~exercism/note +[Wikipedia's Sieve of Eratosthenes article][eratosthenes] has a useful graphic that explains the algorithm. + +The tests don't check that you've implemented the algorithm, only that you've come up with the correct list of primes. +A good first test is to check that you do not use division or remainder operations. + +[eratosthenes]: https://en.wikipedia.org/wiki/Sieve_of_Eratosthenes +~~~~ diff --git a/exercises/practice/sieve/.docs/introduction.md b/exercises/practice/sieve/.docs/introduction.md new file mode 100644 index 00000000..f6c1cf79 --- /dev/null +++ b/exercises/practice/sieve/.docs/introduction.md @@ -0,0 +1,7 @@ +# Introduction + +You bought a big box of random computer parts at a garage sale. +You've started putting the parts together to build custom computers. + +You want to test the performance of different combinations of parts, and decide to create your own benchmarking program to see how your computers compare. +You choose the famous "Sieve of Eratosthenes" algorithm, an ancient algorithm, but one that should push your computers to the limits. diff --git a/exercises/practice/sieve/.meta/config.json b/exercises/practice/sieve/.meta/config.json new file mode 100644 index 00000000..ed218de9 --- /dev/null +++ b/exercises/practice/sieve/.meta/config.json @@ -0,0 +1,19 @@ +{ + "authors": [ + "BNAndras" + ], + "files": { + "solution": [ + "src/main/groovy/Sieve.groovy" + ], + "test": [ + "src/test/groovy/SieveSpec.groovy" + ], + "example": [ + ".meta/src/reference/groovy/Sieve.groovy" + ] + }, + "blurb": "Use the Sieve of Eratosthenes to find all the primes from 2 up to a given number.", + "source": "Sieve of Eratosthenes at Wikipedia", + "source_url": "https://en.wikipedia.org/wiki/Sieve_of_Eratosthenes" +} diff --git a/exercises/practice/sieve/.meta/src/reference/groovy/Sieve.groovy b/exercises/practice/sieve/.meta/src/reference/groovy/Sieve.groovy new file mode 100644 index 00000000..ae57dd77 --- /dev/null +++ b/exercises/practice/sieve/.meta/src/reference/groovy/Sieve.groovy @@ -0,0 +1,19 @@ +class Sieve { + + static primes(Integer limit) { + if (limit < 2) { + return [] + } + + def results = [] + def nums = (2..limit).collect() + while (nums.size() > 0) { + def (head, tail) = [nums.head(), nums.tail()] + results.add(head) + nums = tail.findAll { it % head != 0 } + } + + results + } + +} diff --git a/exercises/practice/sieve/.meta/tests.toml b/exercises/practice/sieve/.meta/tests.toml new file mode 100644 index 00000000..fec5e1a1 --- /dev/null +++ b/exercises/practice/sieve/.meta/tests.toml @@ -0,0 +1,25 @@ +# This is an auto-generated file. +# +# Regenerating this file via `configlet sync` will: +# - Recreate every `description` key/value pair +# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications +# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion) +# - Preserve any other key/value pair +# +# As user-added comments (using the # character) will be removed when this file +# is regenerated, comments can be added via a `comment` key. + +[88529125-c4ce-43cc-bb36-1eb4ddd7b44f] +description = "no primes under two" + +[4afe9474-c705-4477-9923-840e1024cc2b] +description = "find first prime" + +[974945d8-8cd9-4f00-9463-7d813c7f17b7] +description = "find primes up to 10" + +[2e2417b7-3f3a-452a-8594-b9af08af6d82] +description = "limit is prime" + +[92102a05-4c7c-47de-9ed0-b7d5fcd00f21] +description = "find primes up to 1000" diff --git a/exercises/practice/sieve/build.gradle b/exercises/practice/sieve/build.gradle new file mode 100644 index 00000000..e16cd99d --- /dev/null +++ b/exercises/practice/sieve/build.gradle @@ -0,0 +1,18 @@ +apply plugin: "groovy" + +repositories { + mavenCentral() +} + +dependencies { + testImplementation "org.spockframework:spock-core:2.0-M2-groovy-3.0" + implementation "org.codehaus.groovy:groovy-all:3.0.2" +} + +test { + useJUnitPlatform() + testLogging { + exceptionFormat = 'full' + events = ["passed", "failed", "skipped"] + } +} \ No newline at end of file diff --git a/exercises/practice/sieve/gradle/wrapper/gradle-wrapper.jar b/exercises/practice/sieve/gradle/wrapper/gradle-wrapper.jar new file mode 100644 index 00000000..f3d88b1c Binary files /dev/null and b/exercises/practice/sieve/gradle/wrapper/gradle-wrapper.jar differ diff --git a/exercises/practice/sieve/gradle/wrapper/gradle-wrapper.properties b/exercises/practice/sieve/gradle/wrapper/gradle-wrapper.properties new file mode 100644 index 00000000..b7c8c5db --- /dev/null +++ b/exercises/practice/sieve/gradle/wrapper/gradle-wrapper.properties @@ -0,0 +1,5 @@ +distributionBase=GRADLE_USER_HOME +distributionPath=wrapper/dists +distributionUrl=https\://services.gradle.org/distributions/gradle-6.2-bin.zip +zipStoreBase=GRADLE_USER_HOME +zipStorePath=wrapper/dists diff --git a/exercises/practice/sieve/gradlew b/exercises/practice/sieve/gradlew new file mode 100644 index 00000000..2fe81a7d --- /dev/null +++ b/exercises/practice/sieve/gradlew @@ -0,0 +1,183 @@ +#!/usr/bin/env sh + +# +# Copyright 2015 the original author or authors. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# https://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +############################################################################## +## +## Gradle start up script for UN*X +## +############################################################################## + +# Attempt to set APP_HOME +# Resolve links: $0 may be a link +PRG="$0" +# Need this for relative symlinks. +while [ -h "$PRG" ] ; do + ls=`ls -ld "$PRG"` + link=`expr "$ls" : '.*-> \(.*\)$'` + if expr "$link" : '/.*' > /dev/null; then + PRG="$link" + else + PRG=`dirname "$PRG"`"/$link" + fi +done +SAVED="`pwd`" +cd "`dirname \"$PRG\"`/" >/dev/null +APP_HOME="`pwd -P`" +cd "$SAVED" >/dev/null + +APP_NAME="Gradle" +APP_BASE_NAME=`basename "$0"` + +# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' + +# Use the maximum available, or set MAX_FD != -1 to use that value. +MAX_FD="maximum" + +warn () { + echo "$*" +} + +die () { + echo + echo "$*" + echo + exit 1 +} + +# OS specific support (must be 'true' or 'false'). +cygwin=false +msys=false +darwin=false +nonstop=false +case "`uname`" in + CYGWIN* ) + cygwin=true + ;; + Darwin* ) + darwin=true + ;; + MINGW* ) + msys=true + ;; + NONSTOP* ) + nonstop=true + ;; +esac + +CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar + +# Determine the Java command to use to start the JVM. +if [ -n "$JAVA_HOME" ] ; then + if [ -x "$JAVA_HOME/jre/sh/java" ] ; then + # IBM's JDK on AIX uses strange locations for the executables + JAVACMD="$JAVA_HOME/jre/sh/java" + else + JAVACMD="$JAVA_HOME/bin/java" + fi + if [ ! -x "$JAVACMD" ] ; then + die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +else + JAVACMD="java" + which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." +fi + +# Increase the maximum file descriptors if we can. +if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then + MAX_FD_LIMIT=`ulimit -H -n` + if [ $? -eq 0 ] ; then + if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then + MAX_FD="$MAX_FD_LIMIT" + fi + ulimit -n $MAX_FD + if [ $? -ne 0 ] ; then + warn "Could not set maximum file descriptor limit: $MAX_FD" + fi + else + warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" + fi +fi + +# For Darwin, add options to specify how the application appears in the dock +if $darwin; then + GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" +fi + +# For Cygwin or MSYS, switch paths to Windows format before running java +if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then + APP_HOME=`cygpath --path --mixed "$APP_HOME"` + CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` + JAVACMD=`cygpath --unix "$JAVACMD"` + + # We build the pattern for arguments to be converted via cygpath + ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` + SEP="" + for dir in $ROOTDIRSRAW ; do + ROOTDIRS="$ROOTDIRS$SEP$dir" + SEP="|" + done + OURCYGPATTERN="(^($ROOTDIRS))" + # Add a user-defined pattern to the cygpath arguments + if [ "$GRADLE_CYGPATTERN" != "" ] ; then + OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" + fi + # Now convert the arguments - kludge to limit ourselves to /bin/sh + i=0 + for arg in "$@" ; do + CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` + CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option + + if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition + eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` + else + eval `echo args$i`="\"$arg\"" + fi + i=`expr $i + 1` + done + case $i in + 0) set -- ;; + 1) set -- "$args0" ;; + 2) set -- "$args0" "$args1" ;; + 3) set -- "$args0" "$args1" "$args2" ;; + 4) set -- "$args0" "$args1" "$args2" "$args3" ;; + 5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; + 6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; + 7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; + 8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; + 9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; + esac +fi + +# Escape application args +save () { + for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done + echo " " +} +APP_ARGS=`save "$@"` + +# Collect all arguments for the java command, following the shell quoting and substitution rules +eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" + +exec "$JAVACMD" "$@" diff --git a/exercises/practice/sieve/gradlew.bat b/exercises/practice/sieve/gradlew.bat new file mode 100644 index 00000000..62bd9b9c --- /dev/null +++ b/exercises/practice/sieve/gradlew.bat @@ -0,0 +1,103 @@ +@rem +@rem Copyright 2015 the original author or authors. +@rem +@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 + +@if "%DEBUG%" == "" @echo off +@rem ########################################################################## +@rem +@rem Gradle startup script for Windows +@rem +@rem ########################################################################## + +@rem Set local scope for the variables with windows NT shell +if "%OS%"=="Windows_NT" setlocal + +set DIRNAME=%~dp0 +if "%DIRNAME%" == "" set DIRNAME=. +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" + +@rem Find java.exe +if defined JAVA_HOME goto findJavaFromJavaHome + +set JAVA_EXE=java.exe +%JAVA_EXE% -version >NUL 2>&1 +if "%ERRORLEVEL%" == "0" goto init + +echo. +echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:findJavaFromJavaHome +set JAVA_HOME=%JAVA_HOME:"=% +set JAVA_EXE=%JAVA_HOME%/bin/java.exe + +if exist "%JAVA_EXE%" goto init + +echo. +echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:init +@rem Get command-line arguments, handling Windows variants + +if not "%OS%" == "Windows_NT" goto win9xME_args + +:win9xME_args +@rem Slurp the command line arguments. +set CMD_LINE_ARGS= +set _SKIP=2 + +:win9xME_args_slurp +if "x%~1" == "x" goto execute + +set CMD_LINE_ARGS=%* + +:execute +@rem Setup the command line + +set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar + +@rem Execute Gradle +"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% + +:end +@rem End local scope for the variables with windows NT shell +if "%ERRORLEVEL%"=="0" goto mainEnd + +:fail +rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of +rem the _cmd.exe /c_ return code! +if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 +exit /b 1 + +:mainEnd +if "%OS%"=="Windows_NT" endlocal + +:omega diff --git a/exercises/practice/sieve/src/main/groovy/Sieve.groovy b/exercises/practice/sieve/src/main/groovy/Sieve.groovy new file mode 100644 index 00000000..b1c95e65 --- /dev/null +++ b/exercises/practice/sieve/src/main/groovy/Sieve.groovy @@ -0,0 +1,7 @@ +class Sieve { + + static primes(Integer limit) { + throw new UnsupportedOperationException('primes method not implemented.') + } + +} diff --git a/exercises/practice/sieve/src/test/groovy/SieveSpec.groovy b/exercises/practice/sieve/src/test/groovy/SieveSpec.groovy new file mode 100644 index 00000000..c817e85f --- /dev/null +++ b/exercises/practice/sieve/src/test/groovy/SieveSpec.groovy @@ -0,0 +1,67 @@ +import spock.lang.* + +class SieveSpec extends Specification { + + def "No primes under two"() { + expect: + Sieve.primes(limit) == expected + + where: + limit = 1 + expected = [] + } + + @Ignore + def "Find first prime"() { + expect: + Sieve.primes(limit) == expected + + where: + limit = 2 + expected = [2] + } + + @Ignore + def "Find primes up to 10"() { + expect: + Sieve.primes(limit) == expected + + where: + limit = 10 + expected = [2, 3, 5, 7] + } + + @Ignore + def "Limit is prime"() { + expect: + Sieve.primes(limit) == expected + + where: + limit = 13 + expected = [2, 3, 5, 7, 11, 13] + } + + @Ignore + def "Find primes up to 1000"() { + expect: + Sieve.primes(limit) == expected + + where: + limit = 1000 + expected = [ + 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, + 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, + 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, + 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, + 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, + 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, 419, 421, 431, 433, + 439, 443, 449, 457, 461, 463, 467, 479, 487, 491, 499, 503, 509, 521, + 523, 541, 547, 557, 563, 569, 571, 577, 587, 593, 599, 601, 607, 613, + 617, 619, 631, 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701, + 709, 719, 727, 733, 739, 743, 751, 757, 761, 769, 773, 787, 797, 809, + 811, 821, 823, 827, 829, 839, 853, 857, 859, 863, 877, 881, 883, 887, + 907, 911, 919, 929, 937, 941, 947, 953, 967, 971, 977, 983, 991, 997 + ] + } + +} diff --git a/settings.gradle b/settings.gradle index 6ff19dee..0c756f37 100644 --- a/settings.gradle +++ b/settings.gradle @@ -50,6 +50,7 @@ include 'exercises:practice:rotational-cipher' include 'exercises:practice:run-length-encoding' include 'exercises:practice:saddle-points' include 'exercises:practice:scrabble-score' +include 'exercises:practice:sieve' include 'exercises:practice:space-age' include 'exercises:practice:strain' include 'exercises:practice:sum-of-multiples'