1
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var baseWrapperValue = require('./_baseWrapperValue'),
|
2
|
getView = require('./_getView'),
|
3
|
isArray = require('./isArray');
|
4
|
|
5
|
/** Used to indicate the type of lazy iteratees. */
|
6
|
var LAZY_FILTER_FLAG = 1,
|
7
|
LAZY_MAP_FLAG = 2;
|
8
|
|
9
|
/* Built-in method references for those with the same name as other `lodash` methods. */
|
10
|
var nativeMin = Math.min;
|
11
|
|
12
|
/**
|
13
|
* Extracts the unwrapped value from its lazy wrapper.
|
14
|
*
|
15
|
* @private
|
16
|
* @name value
|
17
|
* @memberOf LazyWrapper
|
18
|
* @returns {*} Returns the unwrapped value.
|
19
|
*/
|
20
|
function lazyValue() {
|
21
|
var array = this.__wrapped__.value(),
|
22
|
dir = this.__dir__,
|
23
|
isArr = isArray(array),
|
24
|
isRight = dir < 0,
|
25
|
arrLength = isArr ? array.length : 0,
|
26
|
view = getView(0, arrLength, this.__views__),
|
27
|
start = view.start,
|
28
|
end = view.end,
|
29
|
length = end - start,
|
30
|
index = isRight ? end : (start - 1),
|
31
|
iteratees = this.__iteratees__,
|
32
|
iterLength = iteratees.length,
|
33
|
resIndex = 0,
|
34
|
takeCount = nativeMin(length, this.__takeCount__);
|
35
|
|
36
|
if (!isArr || (!isRight && arrLength == length && takeCount == length)) {
|
37
|
return baseWrapperValue(array, this.__actions__);
|
38
|
}
|
39
|
var result = [];
|
40
|
|
41
|
outer:
|
42
|
while (length-- && resIndex < takeCount) {
|
43
|
index += dir;
|
44
|
|
45
|
var iterIndex = -1,
|
46
|
value = array[index];
|
47
|
|
48
|
while (++iterIndex < iterLength) {
|
49
|
var data = iteratees[iterIndex],
|
50
|
iteratee = data.iteratee,
|
51
|
type = data.type,
|
52
|
computed = iteratee(value);
|
53
|
|
54
|
if (type == LAZY_MAP_FLAG) {
|
55
|
value = computed;
|
56
|
} else if (!computed) {
|
57
|
if (type == LAZY_FILTER_FLAG) {
|
58
|
continue outer;
|
59
|
} else {
|
60
|
break outer;
|
61
|
}
|
62
|
}
|
63
|
}
|
64
|
result[resIndex++] = value;
|
65
|
}
|
66
|
return result;
|
67
|
}
|
68
|
|
69
|
module.exports = lazyValue;
|