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Diffstat (limited to 'node_modules/lodash/_createPartial.js')
-rw-r--r-- | node_modules/lodash/_createPartial.js | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/node_modules/lodash/_createPartial.js b/node_modules/lodash/_createPartial.js new file mode 100644 index 0000000..e16c248 --- /dev/null +++ b/node_modules/lodash/_createPartial.js @@ -0,0 +1,43 @@ +var apply = require('./_apply'), + createCtor = require('./_createCtor'), + root = require('./_root'); + +/** Used to compose bitmasks for function metadata. */ +var WRAP_BIND_FLAG = 1; + +/** + * Creates a function that wraps `func` to invoke it with the `this` binding + * of `thisArg` and `partials` prepended to the arguments it receives. + * + * @private + * @param {Function} func The function to wrap. + * @param {number} bitmask The bitmask flags. See `createWrap` for more details. + * @param {*} thisArg The `this` binding of `func`. + * @param {Array} partials The arguments to prepend to those provided to + * the new function. + * @returns {Function} Returns the new wrapped function. + */ +function createPartial(func, bitmask, thisArg, partials) { + var isBind = bitmask & WRAP_BIND_FLAG, + Ctor = createCtor(func); + + function wrapper() { + var argsIndex = -1, + argsLength = arguments.length, + leftIndex = -1, + leftLength = partials.length, + args = Array(leftLength + argsLength), + fn = (this && this !== root && this instanceof wrapper) ? Ctor : func; + + while (++leftIndex < leftLength) { + args[leftIndex] = partials[leftIndex]; + } + while (argsLength--) { + args[leftIndex++] = arguments[++argsIndex]; + } + return apply(fn, isBind ? thisArg : this, args); + } + return wrapper; +} + +module.exports = createPartial; |