89 lines
1.8 KiB
Plaintext
89 lines
1.8 KiB
Plaintext
#!/usr/local/bin/jsish -u %s
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var str = "abcdefgh";
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var n = 2;
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var m = 3;
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// In jsish, semi-colon first character lines are echoed with result
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;str;
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;n;
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;m;
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// * starting from n characters in and of m length;
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;str.substr(n, m);
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// * starting from n characters in, up to the end of the string;
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;str.substr(n);
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;str.substring(n);
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// * whole string minus last character;
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;str.substring(0, str.length - 1);
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// * starting from a known character within the string and of m length;
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;str.substr(str.indexOf('b'), m);
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// * starting from a known substring within the string and of m length.
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;str.substr(str.indexOf('bc'), m);
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/* Functional */
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var res = (function () {
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'use strict';
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// take :: Int -> Text -> Text
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function take(n, s) {
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return s.substr(0, n);
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}
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// drop :: Int -> Text -> Text
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function drop(n, s) {
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return s.substr(n);
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}
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// init :: Text -> Text
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function init(s) {
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var n = s.length;
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return (n > 0 ? s.substr(0, n - 1) : undefined);
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}
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// breakOn :: Text -> Text -> (Text, Text)
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function breakOn(strPattern, s) {
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var i = s.indexOf(strPattern);
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return i === -1 ? [strPattern, ''] : [s.substr(0, i), s.substr(i)];
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}
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var str = 'abcdefgh';
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return JSON.stringify({
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'from 4 in, of 3 length': (function (n, m) {
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return take(m, drop(n, str));
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})(4, 3),
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'from 3 in, up to end' : (function (n) {
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return drop(n, str);
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})(3),
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'all but last' : init(str),
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'from matching b, of length 3' : (function (pattern, s, n) {
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return take(n, breakOn(pattern, s)[1]);
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})('b', str, 3),
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'from matching bc, of length 4':(function (pattern, s, n) {
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return take(n, breakOn(pattern, s)[1]);
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})('bc', str, 4)
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}, true);
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})();
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;res;
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