forked from arne/asdf-games
21 lines
489 B
JavaScript
21 lines
489 B
JavaScript
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'use strict';
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var repeat = require('repeat-string');
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module.exports = function padLeft(val, num, str) {
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var padding = '';
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var diff = num - val.length;
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// Breakpoints based on benchmarks to use the fastest approach
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// for the given number of zeros
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if (diff <= 5 && !str) {
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padding = '00000';
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} else if (diff <= 25 && !str) {
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padding = '000000000000000000000000000';
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} else {
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return val + repeat(str || '0', diff);
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}
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return val + padding.slice(0, diff);
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};
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