/trunk/jsdoc-toolkit/app/frame/String.js
http://jsdoc-toolkit.googlecode.com/ · JavaScript · 93 lines · 27 code · 4 blank · 62 comment · 15 complexity · 01bf03dca27b2e0612cbc6beb2f78c43 MD5 · raw file
- /**
- @name String
- @class Additions to the core string object.
- */
- /** @author Steven Levithan, released as public domain. */
- String.prototype.trim = function() {
- var str = this.replace(/^\s+/, '');
- for (var i = str.length - 1; i >= 0; i--) {
- if (/\S/.test(str.charAt(i))) {
- str = str.substring(0, i + 1);
- break;
- }
- }
- return str;
- }
- /*t:
- plan(6, "Testing String.prototype.trim.");
-
- var s = " a bc ".trim();
- is(s, "a bc", "multiple spaces front and back are trimmed.");
- s = "a bc\n\n".trim();
- is(s, "a bc", "newlines only in back are trimmed.");
-
- s = "\ta bc".trim();
- is(s, "a bc", "tabs only in front are trimmed.");
-
- s = "\n \t".trim();
- is(s, "", "an all-space string is trimmed to empty.");
-
- s = "a b\nc".trim();
- is(s, "a b\nc", "a string with no spaces in front or back is trimmed to itself.");
-
- s = "".trim();
- is(s, "", "an empty string is trimmed to empty.");
- */
- String.prototype.balance = function(open, close) {
- var i = 0;
- while (this.charAt(i) != open) {
- if (i == this.length) return [-1, -1];
- i++;
- }
-
- var j = i+1;
- var balance = 1;
- while (j < this.length) {
- if (this.charAt(j) == open) balance++;
- if (this.charAt(j) == close) balance--;
- if (balance == 0) break;
- j++;
- if (j == this.length) return [-1, -1];
- }
-
- return [i, j];
- }
- /*t:
- plan(16, "Testing String.prototype.balance.");
-
- var s = "{abc}".balance("{","}");
- is(s[0], 0, "opener in first is found.");
- is(s[1], 4, "closer in last is found.");
-
- s = "ab{c}de".balance("{","}");
- is(s[0], 2, "opener in middle is found.");
- is(s[1], 4, "closer in middle is found.");
-
- s = "a{b{c}de}f".balance("{","}");
- is(s[0], 1, "nested opener is found.");
- is(s[1], 8, "nested closer is found.");
-
- s = "{}".balance("{","}");
- is(s[0], 0, "opener with no content is found.");
- is(s[1], 1, "closer with no content is found.");
-
- s = "".balance("{","}");
- is(s[0], -1, "empty string opener is -1.");
- is(s[1], -1, "empty string closer is -1.");
-
- s = "{abc".balance("{","}");
- is(s[0], -1, "opener with no closer returns -1.");
- is(s[1], -1, "no closer returns -1.");
-
- s = "abc".balance("{","}");
- is(s[0], -1, "no opener or closer returns -1 for opener.");
- is(s[1], -1, "no opener or closer returns -1 for closer.");
-
- s = "a<bc}de".balance("<","}");
- is(s[0], 1, "unmatching opener is found.");
- is(s[1], 4, "unmatching closer is found.");
- */