In this shot, we will check if an array in TypeScript contains an element by using the
includes() method. This method returns a boolean value indicating if an element is present in the array.
element: This is the element we want to check if it is present in the given
If the element is present in the
array, then true is returned. Otherwise, false is returned.
Let's see how this works in the following code:
// create arrays in TypeScript let names: string = ["Theodore", "James", "Peter", "Amaka"] let numbers : Array<number>; numbers = [12, 34, 5, 0.9] let cars : Array<string> = ["Porsche", "Toyota", "Lexus"] // check if the arrays contain some elements console.log(names.includes("Jude")) console.log(names.includes("Theodore")) console.log(numbers.includes(3)) console.log(numbers.includes(0.9)) console.log(cars.includes("Bugatti")) console.log(cars.includes("Toyota"))
includes()method, we check to see if some elements are present in the arrays. Then we print the results to the console.
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