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40 lines
1.3 KiB
JavaScript
40 lines
1.3 KiB
JavaScript
6 years ago
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/* Built-in method references for those with the same name as other `lodash` methods. */
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var nativeMax = Math.max;
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/**
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* Creates an array that is the composition of partially applied arguments,
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* placeholders, and provided arguments into a single array of arguments.
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*
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* @private
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* @param {Array} args The provided arguments.
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* @param {Array} partials The arguments to prepend to those provided.
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* @param {Array} holders The `partials` placeholder indexes.
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* @params {boolean} [isCurried] Specify composing for a curried function.
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* @returns {Array} Returns the new array of composed arguments.
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*/
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function composeArgs(args, partials, holders, isCurried) {
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var argsIndex = -1,
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argsLength = args.length,
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holdersLength = holders.length,
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leftIndex = -1,
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leftLength = partials.length,
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rangeLength = nativeMax(argsLength - holdersLength, 0),
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result = Array(leftLength + rangeLength),
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isUncurried = !isCurried;
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while (++leftIndex < leftLength) {
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result[leftIndex] = partials[leftIndex];
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}
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while (++argsIndex < holdersLength) {
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if (isUncurried || argsIndex < argsLength) {
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result[holders[argsIndex]] = args[argsIndex];
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}
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}
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while (rangeLength--) {
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result[leftIndex++] = args[argsIndex++];
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}
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return result;
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}
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module.exports = composeArgs;
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