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doc/jsdoc-toolkit/app/frame/String.js

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+/**
+	@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.");
+*/