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Ensure _.merge applies a given callback to nested properties. [closes #227]

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Former-commit-id: 1a58c178e0ecb9c50512f221b4aed82762709066
This commit is contained in:
John-David Dalton
2013-04-01 23:49:35 -07:00
parent 6c25905ae4
commit b0d942d0ec
2 changed files with 14 additions and 4 deletions
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7
lodash.js
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@@ -2005,6 +2005,7 @@
var callback = args[3],
stackA = args[4],
stackB = args[5];
console.log(object)
} else {
stackA = [];
stackB = [];
@@ -2041,9 +2042,10 @@
? (isArray(value) ? value : [])
: (isPlainObject(value) ? value : {});
var isShallow;
if (callback) {
result = callback(value, source);
if (typeof result != 'undefined') {
if ((isShallow = typeof result != 'undefined')) {
value = result;
}
}
@@ -2052,13 +2054,14 @@
stackB.push(value);
// recursively merge objects and arrays (susceptible to call stack limits)
if (!callback) {
if (!isShallow) {
value = merge(value, source, indicatorObject, callback, stackA, stackB);
}
}
}
else {
if (callback) {
console.log('hi')
result = callback(value, source);
if (typeof result == 'undefined') {
result = source;

11
test/test.js
View File

@@ -1801,8 +1801,15 @@
});
test('should handle merging if `callback` returns `undefined`', function() {
var actual = _.merge({ 'a': 1 }, { 'a': 2 }, function() { });
deepEqual(actual, { 'a': 2 });
var actual = _.merge({ 'a': { 'b': [1, 1] } }, { 'a': { 'b': [0] } }, function() { });
deepEqual(actual, { 'a': { 'b': [0, 1] } });
});
test('should defer to `callback` when it returns a value other than `undefined`', function() {
var actual = _.merge({ 'a': { 'b': [0, 1] } }, { 'a': { 'b': [2] } }, function(a, b) {
return _.isArray(a) ? a.concat(b) : undefined;
});
deepEqual(actual, { 'a': { 'b': [0, 1, 2] } });
});
}(1, 2, 3));