Version 1

[yaffs-website] / node_modules / grunt-legacy-log / node_modules / lodash / internal / isIndex.js

diff --git a/node_modules/grunt-legacy-log/node_modules/lodash/internal/isIndex.js b/node_modules/grunt-legacy-log/node_modules/lodash/internal/isIndex.js
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index 0000000..469164b
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+++ b/node_modules/grunt-legacy-log/node_modules/lodash/internal/isIndex.js
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+/** Used to detect unsigned integer values. */
+var reIsUint = /^\d+$/;
+
+/**
+ * Used as the [maximum length](http://ecma-international.org/ecma-262/6.0/#sec-number.max_safe_integer)
+ * of an array-like value.
+ */
+var MAX_SAFE_INTEGER = 9007199254740991;
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  value = (typeof value == 'number' || reIsUint.test(value)) ? +value : -1;
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return value > -1 && value % 1 == 0 && value < length;
+}
+
+module.exports = isIndex;