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Reduce code related to array method chaining.

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John-David Dalton
2014-09-12 13:00:40 -07:00
parent 6957b02c27
commit 8cd4732321
1 changed files with 18 additions and 42 deletions
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60
lodash.js
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@@ -9627,58 +9627,34 @@
lodash[methodName].placeholder = lodash;
});
// add `Array` functions that return unwrapped values
arrayEach(['join', 'pop', 'shift'], function(methodName) {
var func = arrayProto[methodName];
// add `Array.prototype` functions
arrayEach(['concat', 'join', 'pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
var arrayFunc = arrayProto[methodName],
retUnwrapped = /join|pop|shift/.test(methodName),
chainName = /push|reverse|sort|unshift/.test(methodName) ? 'tap' : 'thru',
fixObjects = !support.spliceObjects && /pop|shift|splice/.test(methodName);
// avoid array-like object bugs with `Array#shift` and `Array#splice` in
// IE < 9, Firefox < 10, Narwhal, and RingoJS
var func = !fixObjects ? arrayFunc : function() {
var result = arrayFunc.apply(this, arguments);
if (this.length === 0) {
delete this[0];
}
return result;
};
lodash.prototype[methodName] = function() {
var args = arguments;
if (!this.__chain__) {
if (retUnwrapped && !this.__chain__) {
return func.apply(this.value(), args);
}
return this.thru(function(value) {
return func.apply(value, args);
});
};
});
// add `Array` functions that return wrapped value
arrayEach(['concat', 'push', 'reverse', 'sort', 'splice', 'unshift'], function(methodName) {
var func = arrayProto[methodName],
chainName = (methodName == 'concat' || methodName == 'splice') ? 'thru' : 'tap';
lodash.prototype[methodName] = function() {
var args = arguments;
return this[chainName](function(value) {
return func.apply(value, args);
});
};
});
// avoid array-like object bugs with `Array#shift` and `Array#splice`
// in IE < 9, Firefox < 10, Narwhal, and RingoJS
if (!support.spliceObjects) {
arrayEach(['pop', 'shift', 'splice'], function(methodName) {
var func = arrayProto[methodName],
notSplice = methodName != 'splice';
function wrapper(value, args) {
var result = func.apply(value, args);
if (value.length === 0) {
delete value[0];
}
return result;
}
lodash.prototype[methodName] = function() {
var args = arguments;
if (notSplice && !this.__chain__) {
return wrapper(this.value(), args);
}
return this.thru(function(value) {
return wrapper(value, args);
});
};
});
}
return lodash;
}