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on this file since 76712b2 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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1 | var createPadding = require('./_createPadding'),
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2 | stringSize = require('./_stringSize'),
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3 | toInteger = require('./toInteger'),
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4 | toString = require('./toString');
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5 |
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6 | /**
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7 | * Pads `string` on the left side if it's shorter than `length`. Padding
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8 | * characters are truncated if they exceed `length`.
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9 | *
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10 | * @static
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11 | * @memberOf _
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12 | * @since 4.0.0
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13 | * @category String
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14 | * @param {string} [string=''] The string to pad.
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15 | * @param {number} [length=0] The padding length.
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16 | * @param {string} [chars=' '] The string used as padding.
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17 | * @returns {string} Returns the padded string.
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18 | * @example
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19 | *
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20 | * _.padStart('abc', 6);
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21 | * // => ' abc'
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22 | *
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23 | * _.padStart('abc', 6, '_-');
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24 | * // => '_-_abc'
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25 | *
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26 | * _.padStart('abc', 3);
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27 | * // => 'abc'
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28 | */
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29 | function padStart(string, length, chars) {
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30 | string = toString(string);
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31 | length = toInteger(length);
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32 |
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33 | var strLength = length ? stringSize(string) : 0;
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34 | return (length && strLength < length)
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35 | ? (createPadding(length - strLength, chars) + string)
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36 | : string;
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37 | }
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38 |
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39 | module.exports = padStart;
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