add after ary assign assignIn assignInWith assignWith at before bind bindAll bindKey camelCase capitalize castArray ceil chain chunk clamp clone cloneDeep cloneDeepWith cloneWith compact concat conformsTo countBy create curry curryRight debounce deburr defaults defaultsDeep defer delay difference divide drop dropRight each eachRight endsWith entries entriesIn eq escape every extend extendWith fill filter find findIndex findKey findLast findLastIndex findLastKey first flatMap flatMapDeep flatMapDepth flatten flattenDeep flattenDepth flip floor forEach forEachRight forIn forInRight forOwn forOwnRight fromPairs functions functionsIn get groupBy gt gte has hasIn head inRange includes indexOf initial intersection invert invertBy invoke invokeMap isArguments isArray isArrayBuffer isArrayLike isArrayLikeObject isBoolean isBuffer isDate isElement isEmpty isEqual isEqualWith isError isFinite isFunction isInteger isLength isMap isMatch isMatchWith isNaN isNative isNil isNull isNumber isObject isObjectLike isPlainObject isRegExp isSafeInteger isSet isString isSymbol isTypedArray isUndefined isWeakMap isWeakSet join kebabCase keyBy keys keysIn last lastIndexOf lowerCase lowerFirst lt lte map mapKeys mapValues max maxBy mean meanBy memoize merge mergeWith min minBy multiply negate nth omit omitBy once orderBy overArgs pad padEnd padStart parseInt partial partialRight partition pick pickBy pull pullAll pullAllBy pullAllWith pullAt random rearg reduce reduceRight reject remove repeat replace rest result reverse round sample sampleSize set setWith shuffle size slice snakeCase some sortBy sortedIndex sortedIndexOf sortedLastIndex sortedLastIndexOf sortedUniq split spread startCase startsWith subtract sum sumBy tail take takeRight tap template throttle thru toArray toFinite toInteger toLength toLower toNumber toPairs toPairsIn toPlainObject toSafeInteger toString toUpper transform trim trimEnd trimStart truncate unary unescape union uniq uniqBy uniqWith unset unzip unzipWith update updateWith upperCase upperFirst values valuesIn without words wrap wrapperAt wrapperChain wrapperCommit wrapperFlatMap wrapperLodash wrapperNext wrapperPlant wrapperReverse wrapperToIterator wrapperValue xor zip zipObject zipObjectDeep zipWith

Lodash _.zipWith



Lodash is a popular JavaScript library that provides utility functions for common programming tasks such as manipulating arrays, objects, and strings.

One of its functions is the _.zipWith method, which allows you to combine two or more arrays into a single array with a custom function for handling the values.


The syntax for _.zipWith is as follows:

_.zipWith(array1, array2, ..., iteratee)

The function takes two or more arrays as arguments, followed by an iteratee function that determines how the elements are combined. The iteratee function is optional, and if not provided, the default function is a simple function that combines the arrays into subarrays.

Return value:

The _.zipWith function returns an array of combined values based on the iteratee function. If one or more of the input arrays are longer than the others, the resulting array will have undefined elements for the missing values.


Here are some examples of how to use _.zipWith:

Example 1:

const array1 = [1, 2, 3];
const array2 = [4, 5, 6];

const result = _.zipWith(array1, array2, (a, b) => a + b);

console.log(result); // [5, 7, 9]

In the above example, the _.zipWith function combines array1 and array2 into a single array by adding each element together.

Example 2:

const array1 = [1, 2, 3];
const array2 = [4, 5];

const result = _.zipWith(array1, array2, (a, b) => a + b);

console.log(result); // [5, 7]

In this example, array2 is shorter than array1, so the resulting array only contains two elements.


With the _.zipWith function, you can easily combine arrays and customize how the values are combined. It is a powerful utility function that can simplify many common programming tasks.