composeArgs.js
1.17 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
define([], function() {
/* Native method references for those with the same name as other `lodash` methods. */
var nativeMax = Math.max;
/**
* Creates an array that is the composition of partially applied arguments,
* placeholders, and provided arguments into a single array of arguments.
*
* @private
* @param {Array|Object} args The provided arguments.
* @param {Array} partials The arguments to prepend to those provided.
* @param {Array} holders The `partials` placeholder indexes.
* @returns {Array} Returns the new array of composed arguments.
*/
function composeArgs(args, partials, holders) {
var holdersLength = holders.length,
argsIndex = -1,
argsLength = nativeMax(args.length - holdersLength, 0),
leftIndex = -1,
leftLength = partials.length,
result = Array(leftLength + argsLength);
while (++leftIndex < leftLength) {
result[leftIndex] = partials[leftIndex];
}
while (++argsIndex < holdersLength) {
result[holders[argsIndex]] = args[argsIndex];
}
while (argsLength--) {
result[leftIndex++] = args[argsIndex++];
}
return result;
}
return composeArgs;
});