How to use 'regex remove empty lines' in JavaScript

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4function removeInitialEmptyLines(lines) {
5 var i;
6
7 for (i = 0; i < lines.length; i++) {
8 if (lines[i].trim() !== "") {
9 break;
10 }
11 }
12
13 if (i !== 0) {
14 lines = lines.slice(i);
15 }
16
17 return lines;
18}
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130function sanitizeLine(line) {
131 var regMatch = line.match(pattern.matchPattern);
132 var matches = (regMatch || [''])[0];
133 var indent = pattern.getIndent(matches.length);
134
135 return {
136 replaceWith: new Array(indent + 1).join(pattern.replaceWith),
137 start: 0,
138 end: matches.length
139 };
140}

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