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49 lines
1.3 KiB
49 lines
1.3 KiB
var createPadding = require('./_createPadding'), |
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stringSize = require('./_stringSize'), |
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toInteger = require('./toInteger'), |
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toString = require('./toString'); |
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/* Built-in method references for those with the same name as other `lodash` methods. */ |
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var nativeCeil = Math.ceil, |
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nativeFloor = Math.floor; |
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/** |
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* Pads `string` on the left and right sides if it's shorter than `length`. |
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* Padding characters are truncated if they can't be evenly divided by `length`. |
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* |
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* @static |
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* @memberOf _ |
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* @since 3.0.0 |
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* @category String |
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* @param {string} [string=''] The string to pad. |
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* @param {number} [length=0] The padding length. |
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* @param {string} [chars=' '] The string used as padding. |
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* @returns {string} Returns the padded string. |
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* @example |
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* |
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* _.pad('abc', 8); |
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* // => ' abc ' |
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* |
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* _.pad('abc', 8, '_-'); |
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* // => '_-abc_-_' |
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* |
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* _.pad('abc', 3); |
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* // => 'abc' |
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*/ |
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function pad(string, length, chars) { |
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string = toString(string); |
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length = toInteger(length); |
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var strLength = length ? stringSize(string) : 0; |
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if (!length || strLength >= length) { |
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return string; |
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} |
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var mid = (length - strLength) / 2; |
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return ( |
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createPadding(nativeFloor(mid), chars) + |
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string + |
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createPadding(nativeCeil(mid), chars) |
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); |
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} |
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module.exports = pad;
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