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Add baseIsFunction.

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jdalton
2015-02-12 23:09:49 -08:00
parent 22c09cb31b
commit 9b6342e7fa
1 changed files with 22 additions and 16 deletions
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38
lodash.src.js
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@@ -331,6 +331,20 @@
return -1;
}
/**
* The base implementation of `_.isFunction` without support for environments
* with incorrect `typeof` results.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
*/
function baseIsFunction(value) {
// Avoid a Chakra JIT bug in compatibility modes of IE 11.
// See https://github.com/jashkenas/underscore/issues/1621 for more details.
return typeof value == 'function' || false;
}
/**
* The base implementation of `_.sortBy` and `_.sortByAll` which uses `comparer`
* to define the sort order of `array` and replaces criteria objects with their
@@ -7502,7 +7516,7 @@
if (!length) {
return function() { return arguments[0]; };
}
if (!arrayEvery(funcs, isFunction)) {
if (!arrayEvery(funcs, baseIsFunction)) {
throw new TypeError(FUNC_ERROR_TEXT);
}
return function() {
@@ -7547,7 +7561,7 @@
if (fromIndex < 0) {
return function() { return arguments[0]; };
}
if (!arrayEvery(funcs, isFunction)) {
if (!arrayEvery(funcs, baseIsFunction)) {
throw new TypeError(FUNC_ERROR_TEXT);
}
return function() {
@@ -8297,20 +8311,12 @@
* _.isFunction(/abc/);
* // => false
*/
function isFunction(value) {
// Avoid a Chakra JIT bug in compatibility modes of IE 11.
// See https://github.com/jashkenas/underscore/issues/1621 for more details.
return typeof value == 'function' || false;
}
// Fallback for environments that return incorrect `typeof` operator results.
if (isFunction(/x/) || (Uint8Array && !isFunction(Uint8Array))) {
isFunction = function(value) {
// The use of `Object#toString` avoids issues with the `typeof` operator
// in older versions of Chrome and Safari which return 'function' for regexes
// and Safari 8 equivalents which return 'object' for typed array constructors.
return objToString.call(value) == funcTag;
};
}
var isFunction = !(baseIsFunction(/x/) || (Uint8Array && !baseIsFunction(Uint8Array))) ? baseIsFunction : function(value) {
// The use of `Object#toString` avoids issues with the `typeof` operator
// in older versions of Chrome and Safari which return 'function' for regexes
// and Safari 8 equivalents which return 'object' for typed array constructors.
return objToString.call(value) == funcTag;
};
/**
* Checks if `value` is the language type of `Object`.