Array prototype find JavaScript MDN MDN Web Docs
The find method of Array instances returns the first element in the provided array that satisfies the provided testing function If no values satisfy the testing function undefined is returned If you need the index of the found element in the array use findIndex If you need to find the index of a value use indexOf It s similar to findIndex but checks each element for equality
Javascript From an array of objects extract value of a property as , Check out Lodash s pluck function or Underscore s pluck function Both do exactly what you want in a single function call var result pluck objArray foo Update pluck has been removed as of Lodash v4 0 0 in favour of map in combination with something similar to Niet s answer pluck is still available in Underscore Update 2 As Mark points out in the comments
Filter array of objects whose any properties contains a value
Array filter just for filtering an array with conditions Object keys for getting all property names of the object Array some for iterating the keys and exit loop if found String toLowerCase for getting comparable values String includes for checking two string if one contains the other
Object values JavaScript MDN MDN Web Docs, Object values returns an array whose elements are values of enumerable string keyed properties found directly upon object This is the same as iterating with a for in loop except that a for in loop enumerates properties in the prototype chain as well The order of the array returned by Object values is the same as that provided by a
Arrays How can I get the index of an object by its property in
Arrays How can I get the index of an object by its property in , Var index Data findIndex item item name John Which is a simplified version of var index Data findIndex function item return item name John From mozilla The findIndex method returns the index of the first element in the array that satisfies the provided testing function
How To Hide HTML Element By Class Name Using JavaScript
How can I find and update values in an array of objects
How can I find and update values in an array of objects Var item var items id 2 id 2 id 2 let foundIndex items findIndex element element id item id items splice foundIndex 1 item And in case you want to only change a value of an item you can use find function Update the array with the new object by iterating over the array Spencer so the map loops over each
Javascript Get Element By Class In 3 Ways
The values method of Array instances returns a new array iterator object that iterates the value of each item in the array It only expects the this value to have a length property and integer keyed properties Examples values console log element undefined a Calling values on non array objects Array prototype values JavaScript MDN MDN Web Docs. JavaScript arrays are zero indexed the first element of an array is at index 0 the second is at index 1 and so on and the last element is at the value of the array s length property minus 1 JavaScript array copy operations create shallow copies The call to new Array number creates an array with the given length but without elements The length property is the array length or to be precise its last numeric index plus one It is auto adjusted by array methods If we shorten length manually the array is truncated Getting the elements we can get element by its index like arr 0
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