58f8093689
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38 lines
949 B
JavaScript
38 lines
949 B
JavaScript
var isInteger = require('./isInteger');
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/** Used as references for various `Number` constants. */
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var MAX_SAFE_INTEGER = 9007199254740991;
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/**
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* Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
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* double precision number which isn't the result of a rounded unsafe integer.
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*
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* **Note:** This method is based on
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* [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).
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*
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* @static
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* @memberOf _
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* @since 4.0.0
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.
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* @example
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*
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* _.isSafeInteger(3);
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* // => true
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*
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* _.isSafeInteger(Number.MIN_VALUE);
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* // => false
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*
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* _.isSafeInteger(Infinity);
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* // => false
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*
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* _.isSafeInteger('3');
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* // => false
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*/
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function isSafeInteger(value) {
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return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;
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}
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module.exports = isSafeInteger;
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