How to use the reduceRight function from lodash
Find comprehensive JavaScript lodash.reduceRight code examples handpicked from public code repositorys.
lodash.reduceRight is a JavaScript utility function that iterates over an array or object from right to left and applies a callback function to each element, returning a single accumulated value.
4597 4598 4599 4600 4601 4602 4603 4604 4605 4606* @param {*} [thisArg] The `this` binding of `callback`. * @returns {*} Returns the accumulated value. * @example * * var list = [[0, 1], [2, 3], [4, 5]]; * var flat = _.reduceRight(list, function(a, b) { return a.concat(b); }, []); * // => [4, 5, 2, 3, 0, 1] */ function reduceRight(collection, callback, accumulator, thisArg) { var noaccum = arguments.length < 3;
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316 317 318 319 320 321 322 323 324 325module.exports.rangeRight = _.rangeRight; module.exports.rcurry2 = _.rcurry2; module.exports.rcurry3 = _.rcurry3; module.exports.rearg = _.rearg; module.exports.reduce = _.reduce; module.exports.reduceRight = _.reduceRight; module.exports.reductions = _.reductions; module.exports.reject = _.reject; module.exports.remove = _.remove; module.exports.renameKeys = _.renameKeys;
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How does lodash.reduceRight work?
lodash.reduceRight is a higher-order function in JavaScript that applies a callback function to each element of an array, starting from the right end of the array to the left, accumulating the results in a single value. The callback function takes four arguments: the accumulator, the current element, the current index, and the original array.
GitHub: sluukkonen/iiris
200 201 202 203 204 205 206 207 208 209const lodashCallback = (a, b) => a + b const ramdaCallback = (a, b) => b + a const nativeCallback = (a, b) => a + b return { iiris: () => A.reduceRight(iirisCallback, 0, array), lodash: () => _.reduceRight(array, lodashCallback, 0), ramda: () => R.reduceRight(ramdaCallback, 0, array), native: () => array.reduceRight(nativeCallback, 0), } },
1310GitHub: mdmarufsarker/lodash
257 258 259 260 261 262 263 264 265 266 267 268 269console.log(partition); // => [[1, 3], [2]] const reduce = _.reduce([1, 2], (sum, n) => sum + n, 0); console.log(reduce); // => 3 const reduceRight = _.reduceRight([1, 2], (sum, n) => sum + n, 0); console.log(reduceRight); // => 3 const reject = _.reject([4, 5, 6], n => n % 2 == 0); console.log(reject); // => [5]
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Ai Example
1 2 3 4 5 6 7 8 9 10 11const array = [1, 2, 3, 4, 5]; const sum = _.reduceRight( array, (accumulator, currentValue) => { return accumulator + currentValue; }, 0 ); console.log(sum); // Output: 15
In this example, lodash.reduceRight iterates over the array from right to left and accumulates the value of all the elements in the array using the provided reducer function. The initial value of the accumulator is 0, so the sum of all the elements in the array is returned.
155 156 157 158 159 160 161 162 163 164 165 166// log(result); // reduce right let arr = ['a', 'b', 'c', 'd', 'e']; // result = _.reduceRight(arr, (prev,ele) => prev.concat(ele.toUpperCase()), ''); // log(result); // result = _.reduce(arr, (prev,ele) => prev.concat(ele.toUpperCase()), ''); // log(result);
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25 26 27 28 29 30 31 32 33 34 35 36 37// let sum = _.reduce(nums, (total, next) => { return total + next }); // console.log(sum); // let colours = ["red", "green", "white", "blue", "black"]; // let res = _.reduceRight(colours, (next, total) => { return `${total}-${next}` }); // console.log(res); // In the example, we use the reduce operation on a list of integers and strings. // let sum = _.reduce(nums, (total, next) => { return total + next });
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