82f2b76e25
We now use webpack instead of SystemJS, effectively bundling modules into one file (plus commons chunks) for every entry point. This results in a much smaller extension size (almost half). Furthermore we use yarn/npm even for extension run-time dependencies. This relieves us from manually vendoring and building dependencies. It's also easier to understand for new developers familiar with node.
79 lines
2.2 KiB
JavaScript
79 lines
2.2 KiB
JavaScript
var LodashWrapper = require('./_LodashWrapper'),
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flatRest = require('./_flatRest'),
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getData = require('./_getData'),
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getFuncName = require('./_getFuncName'),
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isArray = require('./isArray'),
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isLaziable = require('./_isLaziable');
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/** Error message constants. */
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var FUNC_ERROR_TEXT = 'Expected a function';
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/** Used to compose bitmasks for function metadata. */
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var WRAP_CURRY_FLAG = 8,
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WRAP_PARTIAL_FLAG = 32,
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WRAP_ARY_FLAG = 128,
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WRAP_REARG_FLAG = 256;
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/**
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* Creates a `_.flow` or `_.flowRight` function.
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*
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* @private
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* @param {boolean} [fromRight] Specify iterating from right to left.
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* @returns {Function} Returns the new flow function.
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*/
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function createFlow(fromRight) {
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return flatRest(function(funcs) {
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var length = funcs.length,
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index = length,
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prereq = LodashWrapper.prototype.thru;
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if (fromRight) {
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funcs.reverse();
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}
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while (index--) {
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var func = funcs[index];
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if (typeof func != 'function') {
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throw new TypeError(FUNC_ERROR_TEXT);
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}
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if (prereq && !wrapper && getFuncName(func) == 'wrapper') {
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var wrapper = new LodashWrapper([], true);
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}
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}
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index = wrapper ? index : length;
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while (++index < length) {
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func = funcs[index];
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var funcName = getFuncName(func),
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data = funcName == 'wrapper' ? getData(func) : undefined;
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if (data && isLaziable(data[0]) &&
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data[1] == (WRAP_ARY_FLAG | WRAP_CURRY_FLAG | WRAP_PARTIAL_FLAG | WRAP_REARG_FLAG) &&
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!data[4].length && data[9] == 1
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) {
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wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
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} else {
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wrapper = (func.length == 1 && isLaziable(func))
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? wrapper[funcName]()
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: wrapper.thru(func);
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}
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}
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return function() {
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var args = arguments,
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value = args[0];
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if (wrapper && args.length == 1 && isArray(value)) {
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return wrapper.plant(value).value();
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}
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var index = 0,
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result = length ? funcs[index].apply(this, args) : value;
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while (++index < length) {
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result = funcs[index].call(this, result);
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}
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return result;
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};
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});
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}
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module.exports = createFlow;
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