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Ensure _.flatten works with extremely large arrays. [closes #349]

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This commit is contained in:
John-David Dalton
2013-09-15 18:37:09 -07:00
parent 9f1f2a4845
commit 3dc8436362
8 changed files with 123 additions and 71 deletions
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12
dist/lodash.compat.js vendored
View File

@@ -1113,7 +1113,17 @@
var value = array[index];
// recursively flatten arrays (susceptible to call stack limits)
if (value && typeof value == 'object' && (isArray(value) || isArguments(value))) {
push.apply(result, isShallow ? value : baseFlatten(value, isShallow, isArgArrays));
if (!isShallow) {
value = baseFlatten(value, isShallow, isArgArrays);
}
var pad = result.length,
valIndex = -1,
valLength = value.length;
result.length += valLength;
while (++valIndex < valLength) {
result[pad + valIndex] = value[valIndex];
}
} else if (!isArgArrays) {
result.push(value);
}

90
dist/lodash.compat.min.js vendored
View File

@@ -4,53 +4,53 @@
* Build: `lodash -o ./dist/lodash.compat.js`
*/
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12
dist/lodash.js vendored
View File

@@ -844,7 +844,17 @@
var value = array[index];
// recursively flatten arrays (susceptible to call stack limits)
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while (++valIndex < valLength) {
result[pad + valIndex] = value[valIndex];
}
} else if (!isArgArrays) {
result.push(value);
}

10
dist/lodash.min.js vendored
View File

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12
dist/lodash.underscore.js vendored
View File

@@ -420,7 +420,17 @@
var value = array[index];
// recursively flatten arrays (susceptible to call stack limits)
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push.apply(result, isShallow ? value : baseFlatten(value, isShallow, isArgArrays));
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}
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while (++valIndex < valLength) {
result[pad + valIndex] = value[valIndex];
}
} else if (!isArgArrays) {
result.push(value);
}

34
dist/lodash.underscore.min.js vendored
View File

@@ -3,34 +3,34 @@
* Lo-Dash 2.0.0 (Custom Build) lodash.com/license | Underscore.js 1.5.2 underscorejs.org/LICENSE
* Build: `lodash underscore exports="amd,commonjs,global,node" -o ./dist/lodash.underscore.js`
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12
lodash.js
View File

@@ -1132,7 +1132,17 @@
var value = array[index];
// recursively flatten arrays (susceptible to call stack limits)
if (value && typeof value == 'object' && (isArray(value) || isArguments(value))) {
push.apply(result, isShallow ? value : baseFlatten(value, isShallow, isArgArrays));
if (!isShallow) {
value = baseFlatten(value, isShallow, isArgArrays);
}
var pad = result.length,
valIndex = -1,
valLength = value.length;
result.length += valLength;
while (++valIndex < valLength) {
result[pad + valIndex] = value[valIndex];
}
} else if (!isArgArrays) {
result.push(value);
}

12
test/test.js
View File

@@ -1300,6 +1300,18 @@
deepEqual(actual2, expected);
ok(4 in actual2);
});
test('should work with extremely large arrays', function() {
var expected = Array(5e5),
pass = true;
try {
var actual = _.flatten([expected]);
} catch(e) {
pass = false;
}
deepEqual(pass && actual, expected);
});
}(1, 2, 3));
/*--------------------------------------------------------------------------*/