SPShane Plaseboinplasebo.hashnode.dev·Dec 14, 2021 · 3 min readSome, every and indexOf methods on arraysIntroduced in ES5, the only difference between Array.prototype.some() and Array.prototype.every() is the following: some() is used to check if at least one of the elements of the array passes the test implemented by the provided function; every() is...00
SPShane Plaseboinplasebo.hashnode.dev·Dec 13, 2021 · 2 min readSort method to sort arraysThe sort method sorts the elements of an array according to the callback function. For example on an array of numbers: function ascendingOrder(arr) { return arr.sort(function(a, b) { return a - b; }); } ascendingOrder([1, 5, 2, 3, 4]); // =>...00
SPShane Plaseboinplasebo.hashnode.dev·Dec 13, 2021 · 2 min readUse the reduce Method to Analyze Data in an arrayThe reduce() method allows for more general forms of array processing, and it's possible to show that both filter and map can be derived as special applications of reduce. The reduce method iterates over each item in an array and returns a single val...00
SPShane Plaseboinplasebo.hashnode.dev·Dec 13, 2021 · 4 min readFilter method to filter an array of objectsThe filter() method creates a new array with all elements that pass the test implemented by the provided function. The filter() method calls a function on each element of an array and returns a new array containing only the elements for which that fu...00
SPShane Plaseboinplasebo.hashnode.dev·Dec 13, 2021 · 2 min readMap method to extract data from an array of objectsThe map() method creates a new array populated with the results of calling a provided function on every element in the calling array. Example: let numbers = [1, 4, 9] let roots = numbers.map(function(num) { return Math.sqrt(num) }) // roots is no...00
