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17 lines
533 B
JavaScript
17 lines
533 B
JavaScript
'use strict';
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var toInteger = require('../../../number/to-integer')
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, value = require('../../../object/valid-value')
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, min = Math.min, max = Math.max;
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module.exports = function (searchString/*, endPosition*/) {
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var self, start, endPos;
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self = String(value(this));
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searchString = String(searchString);
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endPos = arguments[1];
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start = ((endPos == null) ? self.length :
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min(max(toInteger(endPos), 0), self.length)) - searchString.length;
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return (start < 0) ? false : (self.indexOf(searchString, start) === start);
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};
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