1
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var baseClamp = require('./_baseClamp'),
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2
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baseToString = require('./_baseToString'),
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3
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toInteger = require('./toInteger'),
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4
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toString = require('./toString');
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5
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6
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/**
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7
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* Checks if `string` starts with the given target string.
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8
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*
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9
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* @static
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10
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* @memberOf _
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11
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* @since 3.0.0
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12
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* @category String
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13
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* @param {string} [string=''] The string to inspect.
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14
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* @param {string} [target] The string to search for.
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15
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* @param {number} [position=0] The position to search from.
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16
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* @returns {boolean} Returns `true` if `string` starts with `target`,
|
17
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* else `false`.
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18
|
* @example
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19
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*
|
20
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* _.startsWith('abc', 'a');
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21
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* // => true
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22
|
*
|
23
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* _.startsWith('abc', 'b');
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24
|
* // => false
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25
|
*
|
26
|
* _.startsWith('abc', 'b', 1);
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27
|
* // => true
|
28
|
*/
|
29
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function startsWith(string, target, position) {
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30
|
string = toString(string);
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31
|
position = position == null
|
32
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? 0
|
33
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: baseClamp(toInteger(position), 0, string.length);
|
34
|
|
35
|
target = baseToString(target);
|
36
|
return string.slice(position, position + target.length) == target;
|
37
|
}
|
38
|
|
39
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module.exports = startsWith;
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