/**
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* Generate URL-friendly unique ID. This method use non-secure predictable
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* random generator.
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*
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* By default, ID will have 21 symbols to have a collision probability similar
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* to UUID v4.
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*
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* @param {string} alphabet Symbols to be used in ID.
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* @param {number} [size=21] The number of symbols in ID.
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*
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* @return {string} Random string.
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*
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* @example
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* const nanoid = require('nanoid/non-secure')
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* model.id = nanoid() //=> "Uakgb_J5m9g-0JDMbcJqL"
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*
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* @name nonSecure
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* @function
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*/
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module.exports = function (alphabet, size) {
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size = size || 21
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var id = ''
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while (0 < size--) {
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id += alphabet[Math.random() * alphabet.length | 0]
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}
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return id
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}
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