Squirrel © Alberto Demichelis
PCRE © University of Cambridge
zlib © Jean-loup Gailly and Mark Adler
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Squirrel Shell is a cross-platform alternative to system shells like sh in Unix-like systems and cmd.exe (command.com) in Microsoft® Windows®. It is based on Squirrel scripting language which has these features:
Cross-platform nature of Squirrel Shell lets users write one script and use it everywhere instead of writing several scripts for doing the same thing, but in different OSes.
Since Squirrel is a generic scripting language, this gives users more power as they aren't limited to functionality, specific to some dedicated purpose.
| Squirrel Shell | Bash | command.com (cmd.exe) |
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#!/usr/bin/squirrelsh // Output simple text message printl("Hello, world!"); |
#!/bin/bash # Output simple text message echo "Hello, world!" |
@echo off rem Output simple text message echo Hello, world! |
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#!/usr/bin/squirrelsh // Run another program run("foo"); |
#!/bin/bash # Run another program foo |
@echo off rem Run another program foo |
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#!/usr/bin/squirrelsh // Work with command line parameters run("foo", [ __argv[1], __argv[2] ]); |
#!/bin/bash # Work with command line parameters foo $1 $2 |
@echo off rem Work with command line parameters foo %1 %2 |
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#!/usr/bin/squirrelsh // Multiply two 2x2 matrices // It's possible to use matrices of any size function matrix (w, h) { local r = array(h); for (local i = 0; i < h; i++) r[i] = array(w, 0); return r; } local m1 = matrix(2, 2), m2 = matrix(2, 2), r = matrix(2, 2); r[0][0] = m1[0][0] * m2[0][0] + m1[0][1] * m2[1][0]; r[0][1] = m1[0][0] * m2[0][1] + m1[0][1] * m2[1][1]; r[1][0] = m1[1][0] * m2[0][0] + m1[1][1] * m2[1][0]; r[1][1] = m1[1][0] * m2[0][1] + m1[1][1] * m2[1][1]; |
#!/bin/bash # Multiply two 2x2 matrices # It's possible to use matrices of any size # Based on code by Charles Duffy # matrix (w, h) function matrix() { local i=0 local current_array=( ) while [ "$i" -lt "$(($1 * $2))" ]; do current_array[$i]=0 i=$((i + 1)) done echo "${current_array[@]}" } # m_idx (w, y, x) function m_idx() { echo "$(($1 * $2 + $3))" } m1=(`matrix 2 2`) m2=(`matrix 2 2`) r=(`matrix 2 2`) r[$(m_idx 2 0 0)]=$((${m1[$(m_idx 2 0 0)]} * ${m2[$(m_idx 2 0 0)]} + ${m1[$(m_idx 2 0 1)]} * ${m2[$(m_idx 2 1 0)]})) r[$(m_idx 2 0 1)]=$((${m1[$(m_idx 2 0 0)]} * ${m2[$(m_idx 2 0 1)]} + ${m1[$(m_idx 2 0 1)]} * ${m2[$(m_idx 2 1 1)]})) r[$(m_idx 2 1 0)]=$((${m1[$(m_idx 2 1 0)]} * ${m2[$(m_idx 2 0 0)]} + ${m1[$(m_idx 2 1 1)]} * ${m2[$(m_idx 2 1 0)]})) r[$(m_idx 2 1 1)]=$((${m1[$(m_idx 2 1 0)]} * ${m2[$(m_idx 2 0 1)]} + ${m1[$(m_idx 2 1 1)]} * ${m2[$(m_idx 2 1 1)]})) |
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Squirrel Shell © 2006-2011, Constantin Makshin Squirrel © Alberto Demichelis PCRE © University of Cambridge zlib © Jean-loup Gailly and Mark Adler |
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