forked from lix-project/lix-website
70 lines
1.7 KiB
JavaScript
70 lines
1.7 KiB
JavaScript
var baseWrapperValue = require('./_baseWrapperValue'),
|
|
getView = require('./_getView'),
|
|
isArray = require('./isArray');
|
|
|
|
/** Used to indicate the type of lazy iteratees. */
|
|
var LAZY_FILTER_FLAG = 1,
|
|
LAZY_MAP_FLAG = 2;
|
|
|
|
/* Built-in method references for those with the same name as other `lodash` methods. */
|
|
var nativeMin = Math.min;
|
|
|
|
/**
|
|
* Extracts the unwrapped value from its lazy wrapper.
|
|
*
|
|
* @private
|
|
* @name value
|
|
* @memberOf LazyWrapper
|
|
* @returns {*} Returns the unwrapped value.
|
|
*/
|
|
function lazyValue() {
|
|
var array = this.__wrapped__.value(),
|
|
dir = this.__dir__,
|
|
isArr = isArray(array),
|
|
isRight = dir < 0,
|
|
arrLength = isArr ? array.length : 0,
|
|
view = getView(0, arrLength, this.__views__),
|
|
start = view.start,
|
|
end = view.end,
|
|
length = end - start,
|
|
index = isRight ? end : (start - 1),
|
|
iteratees = this.__iteratees__,
|
|
iterLength = iteratees.length,
|
|
resIndex = 0,
|
|
takeCount = nativeMin(length, this.__takeCount__);
|
|
|
|
if (!isArr || (!isRight && arrLength == length && takeCount == length)) {
|
|
return baseWrapperValue(array, this.__actions__);
|
|
}
|
|
var result = [];
|
|
|
|
outer:
|
|
while (length-- && resIndex < takeCount) {
|
|
index += dir;
|
|
|
|
var iterIndex = -1,
|
|
value = array[index];
|
|
|
|
while (++iterIndex < iterLength) {
|
|
var data = iteratees[iterIndex],
|
|
iteratee = data.iteratee,
|
|
type = data.type,
|
|
computed = iteratee(value);
|
|
|
|
if (type == LAZY_MAP_FLAG) {
|
|
value = computed;
|
|
} else if (!computed) {
|
|
if (type == LAZY_FILTER_FLAG) {
|
|
continue outer;
|
|
} else {
|
|
break outer;
|
|
}
|
|
}
|
|
}
|
|
result[resIndex++] = value;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
module.exports = lazyValue;
|