diff options
Diffstat (limited to 'tools/eslint/node_modules/js-yaml/node_modules/argparse/node_modules/lodash/lang/isNumber.js')
-rw-r--r-- | tools/eslint/node_modules/js-yaml/node_modules/argparse/node_modules/lodash/lang/isNumber.js | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/tools/eslint/node_modules/js-yaml/node_modules/argparse/node_modules/lodash/lang/isNumber.js b/tools/eslint/node_modules/js-yaml/node_modules/argparse/node_modules/lodash/lang/isNumber.js new file mode 100644 index 0000000000..9404dc851f --- /dev/null +++ b/tools/eslint/node_modules/js-yaml/node_modules/argparse/node_modules/lodash/lang/isNumber.js @@ -0,0 +1,41 @@ +var isObjectLike = require('../internal/isObjectLike'); + +/** `Object#toString` result references. */ +var numberTag = '[object Number]'; + +/** Used for native method references. */ +var objectProto = Object.prototype; + +/** + * Used to resolve the [`toStringTag`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-object.prototype.tostring) + * of values. + */ +var objToString = objectProto.toString; + +/** + * Checks if `value` is classified as a `Number` primitive or object. + * + * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are classified + * as numbers, use the `_.isFinite` method. + * + * @static + * @memberOf _ + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. + * @example + * + * _.isNumber(8.4); + * // => true + * + * _.isNumber(NaN); + * // => true + * + * _.isNumber('8.4'); + * // => false + */ +function isNumber(value) { + return typeof value == 'number' || (isObjectLike(value) && objToString.call(value) == numberTag); +} + +module.exports = isNumber; |