1234567891011121314151617181920212223242526272829303132333435363738 |
- var isInteger = require('./isInteger');
- /** Used as references for various `Number` constants. */
- var MAX_SAFE_INTEGER = 9007199254740991;
- /**
- * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
- * double precision number which isn't the result of a rounded unsafe integer.
- *
- * **Note:** This method is based on
- * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.
- * @example
- *
- * _.isSafeInteger(3);
- * // => true
- *
- * _.isSafeInteger(Number.MIN_VALUE);
- * // => false
- *
- * _.isSafeInteger(Infinity);
- * // => false
- *
- * _.isSafeInteger('3');
- * // => false
- */
- function isSafeInteger(value) {
- return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;
- }
- module.exports = isSafeInteger;
|