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| define(['./_getLength', './_isArrayLike', './isArray', './isArguments'], function (_getLength, _isArrayLike, isArray, isArguments) {
|
| // Internal implementation of a recursive `flatten` function.
| function flatten(input, depth, strict, output) {
| output = output || [];
| if (!depth && depth !== 0) {
| depth = Infinity;
| } else if (depth <= 0) {
| return output.concat(input);
| }
| var idx = output.length;
| for (var i = 0, length = _getLength(input); i < length; i++) {
| var value = input[i];
| if (_isArrayLike(value) && (isArray(value) || isArguments(value))) {
| // Flatten current level of array or arguments object.
| if (depth > 1) {
| flatten(value, depth - 1, strict, output);
| idx = output.length;
| } else {
| var j = 0, len = value.length;
| while (j < len) output[idx++] = value[j++];
| }
| } else if (!strict) {
| output[idx++] = value;
| }
| }
| return output;
| }
|
| return flatten;
|
| });
|
|
