Creates a function that accepts up to n arguments, ignoring any additional arguments.
Call the provided function, fn, with up to n arguments, using Array.slice(0,n) and the spread operator (...).
const ary = ( fn, n) => ( ... args) => fn ( ... args. slice ( 0 , n));
+ } 30 seconds of code Curated collection of useful JavaScript snippets that you can understand in 30 seconds or less. Search for snippet...
Adapter ary call collectInto flip over overArgs pipeAsyncFunctions pipeFunctions promisify rearg spreadOver unary Array chunk compact countBy countOccurrences deepFlatten difference differenceBy differenceWith drop dropRight dropRightWhile dropWhile everyNth filterNonUnique findLast findLastIndex flatten forEachRight groupBy head indexOfAll initial initialize2DArray initializeArrayWithRange initializeArrayWithRangeRight initializeArrayWithValues intersection intersectionBy intersectionWith isSorted join last longestItem mapObject maxN minN nthElement partition pull pullAtIndex pullAtValue pullBy reducedFilter reduceSuccessive reduceWhich remove sample sampleSize shuffle similarity sortedIndex sortedIndexBy sortedLastIndex sortedLastIndexBy symmetricDifference symmetricDifferenceBy symmetricDifferenceWith tail take takeRight takeRightWhile takeWhile union unionBy unionWith uniqueElements unzip unzipWith without xProd zip zipObject zipWith Browser arrayToHtmlList bottomVisible copyToClipboard createElement createEventHub currentURL detectDeviceType elementIsVisibleInViewport getScrollPosition getStyle hasClass hashBrowser hide httpsRedirect observeMutations off on onUserInputChange redirect runAsync scrollToTop setStyle show toggleClass UUIDGeneratorBrowser Date formatDuration getColonTimeFromDate getDaysDiffBetweenDates getMeridiemSuffixOfInteger tomorrow Function attempt bind bindKey chainAsync compose composeRight converge curry debounce defer delay functionName memoize negate once partial partialRight runPromisesInSeries sleep throttle times unfold Math average averageBy clampNumber digitize distance elo factorial fibonacci gcd geometricProgression hammingDistance inRange isDivisible isEven isPrime lcm luhnCheck maxBy median minBy percentile powerset primes randomIntArrayInRange randomIntegerInRange randomNumberInRange round sdbm standardDeviation sum sumBy sumPower toSafeInteger Node atob btoa colorize hasFlags hashNode isTravisCI JSONToFile readFileLines untildify UUIDGeneratorNode Object bindAll deepClone defaults equals findKey findLastKey flattenObject forOwn forOwnRight functions get invertKeyValues lowercaseKeys mapKeys mapValues matches matchesWith merge objectFromPairs objectToPairs omit omitBy orderBy pick pickBy shallowClone size transform truthCheckCollection unflattenObject String anagrams byteSize capitalize capitalizeEveryWord decapitalize escapeHTML escapeRegExp fromCamelCase isAbsoluteURL isLowerCase isUpperCase mask palindrome pluralize removeNonASCII reverseString sortCharactersInString splitLines stripHTMLTags toCamelCase toKebabCase toSnakeCase truncateString unescapeHTML URLJoin words Type getType is isArrayLike isBoolean isEmpty isFunction isNil isNull isNumber isObject isObjectLike isPlainObject isPrimitive isPromiseLike isString isSymbol isUndefined isValidJSON Utility castArray cloneRegExp coalesce coalesceFactory extendHex getURLParameters hexToRGB httpGet httpPost nthArg parseCookie prettyBytes randomHexColorCode RGBToHex serializeCookie timeTaken toCurrency toDecimalMark toOrdinalSuffix validateNumber yesNo Adapter ary Creates a function that accepts up to n arguments, ignoring any additional arguments.
Call the provided function, fn, with up to n arguments, using Array.slice(0,n) and the spread operator (...).
const ary = ( fn, n) => ( ... args) => fn ( ... args. slice ( 0 , n));
Show examples const firstTwoMax = ary ( Math. max, 2 );
[[ 2 , 6 , 'a' ], [ 8 , 4 , 6 ], [ 10 ]]. map ( x => firstTwoMax ( ... x));
📋 Copy to clipboard call Given a key and a set of arguments, call them when given a context. Primarily useful in composition.
Use a closure to call a stored key with stored arguments.
const call = ( key, ... args) => context => context[ key]( ... args);
@@ -271,7 +271,7 @@ Object. assig
longestItem ( ... [ 'a' , 'ab' , 'abc' ], 'abcd' );
longestItem ([ 1 , 2 , 3 ], [ 1 , 2 ], [ 1 , 2 , 3 , 4 , 5 ]);
longestItem ([ 1 , 2 , 3 ], 'foobar' );
- 📋 Copy to clipboard mapObject Maps the values of an array to an object using a function, where the key-value pairs consist of the original value as the key and the mapped value.
Use an anonymous inner function scope to declare an undefined memory space, using closures to store a return value. Use a new Array to store the array with a map of the function over its data set and a comma operator to return a second step, without needing to move from one context to another (due to closures and order of operations).
const mapObject = ( arr, fn) =>
+📋 Copy to clipboard mapObjectadvanced Maps the values of an array to an object using a function, where the key-value pairs consist of the original value as the key and the mapped value.
Use an anonymous inner function scope to declare an undefined memory space, using closures to store a return value. Use a new Array to store the array with a map of the function over its data set and a comma operator to return a second step, without needing to move from one context to another (due to closures and order of operations).
const mapObject = ( arr, fn) =>
( a => (
( a = [ arr, arr. map ( fn)]), a[ 0 ]. reduce (( acc, val, ind) => (( acc[ val] = a[ 1 ][ ind]), acc), {})
))();
30 seconds of code Curated collection of useful JavaScript snippets that you can understand in 30 seconds or less.