110     startIndex = startIndex == null ? func.length - 1 : +startIndex;
112       var length = Math.max(arguments.length - startIndex, 0);
113       var rest = Array(length);
114       for (var index = 0; index < length; index++) {
154     var length = getLength(collection);
155     return typeof length == 'number' && length >= 0 && length <= MAX_ARRAY_INDEX;
166     var i, length;  variable
168       for (i = 0, length = obj.length; i < length; i++) {
173       for (i = 0, length = keys.length; i < length; i++) {
184         length = (keys || obj).length,  variable
185         results = Array(length);
186     for (var index = 0; index < length; index++) {
199           length = (keys || obj).length,
200           index = dir > 0 ? 0 : length - 1;
205       for (; index >= 0 && index < length; index += dir) {
213       var initial = arguments.length >= 3;
253         length = (keys || obj).length;  variable
254     for (var index = 0; index < length; index++) {
266         length = (keys || obj).length;  variable
267     for (var index = 0; index < length; index++) {
314       for (var i = 0, length = obj.length; i < length; i++) {
339       for (var i = 0, length = obj.length; i < length; i++) {
370       return obj[_.random(obj.length - 1)];
373     var length = getLength(sample);
374     n = Math.max(Math.min(n, length), 0);
375     var last = length - 1;
454     return isArrayLike(obj) ? obj.length : _.keys(obj).length;
470     if (array == null || array.length < 1) return void 0;
472     return _.initial(array, array.length - n);
479     return slice.call(array, 0, Math.max(0, array.length - (n == null || guard ? 1 : n)));
485     if (array == null || array.length < 1) return void 0;
486     if (n == null || guard) return array[array.length - 1];
487     return _.rest(array, Math.max(0, array.length - n));
505     var idx = output.length;
506     for (var i = 0, length = getLength(input); i < length; i++) {
511           var j = 0, len = value.length;
515           idx = output.length;
546     for (var i = 0, length = getLength(array); i < length; i++) {
574     var argsLength = arguments.length;
575     for (var i = 0, length = getLength(array); i < length; i++) {
599     var length = array && _.max(array, getLength).length || 0;
600     var result = Array(length);
602     for (var index = 0; index < length; index++) {
617     for (var i = 0, length = getLength(list); i < length; i++) {
631       var length = getLength(array);
632       var index = dir > 0 ? 0 : length - 1;
633       for (; index >= 0 && index < length; index += dir) {
660       var i = 0, length = getLength(array);
663           i = idx >= 0 ? idx : Math.max(idx + length, i);
665           length = idx >= 0 ? Math.min(idx + 1, length) : idx + length + 1;
667       } else if (sortedIndex && idx && length) {
672         idx = predicateFind(slice.call(array, i, length), _.isNaN);
675       for (idx = dir > 0 ? i : length - 1; idx >= 0 && idx < length; idx += dir) {
701     var length = Math.max(Math.ceil((stop - start) / step), 0);
702     var range = Array(length);
704     for (var idx = 0; idx < length; idx++, start += step) {
717     var i = 0, length = array.length;
718     while (i < length) {
755       var position = 0, length = boundArgs.length;
756       var args = Array(length);
757       for (var i = 0; i < length; i++) {
760       while (position < arguments.length) args.push(arguments[position++]);
773     var index = keys.length;
902     var start = args.length - 1;
947     var nonEnumIdx = nonEnumerableProps.length;
988     var length = keys.length;
989     var values = Array(length);
990     for (var i = 0; i < length; i++) {
1001         length = keys.length,
1003     for (var index = 0; index < length; index++) {
1013     var length = keys.length;
1014     var pairs = Array(length);
1015     for (var i = 0; i < length; i++) {
1025     for (var i = 0, length = keys.length; i < length; i++) {
1044       var length = arguments.length;
1046       if (length < 2 || obj == null) return obj;
1047       for (var index = 1; index < length; index++) {
1050             l = keys.length;
1071     for (var i = 0, length = keys.length; i < length; i++) {
1087       if (keys.length > 1) iteratee = optimizeCb(iteratee, keys[1]);
1094     for (var i = 0, length = keys.length; i < length; i++) {
1107       if (keys.length > 1) context = keys[1];
1145     var keys = _.keys(attrs), length = keys.length;
1146     if (object == null) return !length;
1148     for (var i = 0; i < length; i++) {
1224     var length = aStack.length;
1225     while (length--) {
1228       if (aStack[length] === a) return bStack[length] === b;
1238       length = a.length;
1239       if (length !== b.length) return false;
1241       while (length--) {
1242         if (!eq(a[length], b[length], aStack, bStack)) return false;
1247       length = keys.length;
1249       if (_.keys(b).length !== length) return false;
1250       while (length--) {
1252         key = keys[length];
1271 …rayLike(obj) && (_.isArray(obj) || _.isString(obj) || _.isArguments(obj))) return obj.length === 0;
1272     return _.keys(obj).length === 0;
1507       index = offset + match.length;
1588       if ((name === 'shift' || name === 'splice') && obj.length === 0) delete obj[0];