TypedArray.prototype.some()

The some() method of {{jsxref("TypedArray")}} instances returns true if it finds an element in the array that satisfies the provided testing function. Otherwise, it returns false. This method has the same algorithm as {{jsxref("Array.prototype.some()")}}.

{{InteractiveExample("JavaScript Demo: TypedArray.prototype.some()")}}

```js interactive-example function isNegative(element, index, array) { return element < 0; }

const int8 = new Int8Array([-10, 20, -30, 40, -50]); const positives = new Int8Array([10, 20, 30, 40, 50]);

console.log(int8.some(isNegative)); // Expected output: true

console.log(positives.some(isNegative)); // Expected output: false

## Syntax

```js-nolint
some(callbackFn)
some(callbackFn, thisArg)

Parameters#

• callbackFn
• : A function to execute for each element in the typed array. It should return a truthy value to indicate the element passes the test, and a falsy value otherwise. The function is called with the following arguments:
  • element
  • : The current element being processed in the typed array.
  • index
  • : The index of the current element being processed in the typed array.
  • array
  • : The typed array some() was called upon.
• thisArg {{optional_inline}}
• : A value to use as this when executing callbackFn. See iterative methods.

Return value#

false unless callbackFn returns a {{Glossary("truthy")}} value for a typed array element, in which case true is immediately returned.

Description#

See {{jsxref("Array.prototype.some()")}} for more details. This method is not generic and can only be called on typed array instances.

Examples#

Testing size of all typed array elements#

The following example tests whether any element in the typed array is bigger than 10.

function isBiggerThan10(element, index, array) {
  return element > 10;
}
new Uint8Array([2, 5, 8, 1, 4]).some(isBiggerThan10); // false
new Uint8Array([12, 5, 8, 1, 4]).some(isBiggerThan10); // true

Specifications#

{{Specifications}}

Browser compatibility#

{{Compat}}

See also#

• Polyfill of TypedArray.prototype.some in core-js
• JavaScript typed arrays guide
• {{jsxref("TypedArray")}}
• {{jsxref("TypedArray.prototype.every()")}}
• {{jsxref("TypedArray.prototype.forEach()")}}
• {{jsxref("TypedArray.prototype.find()")}}
• {{jsxref("TypedArray.prototype.includes()")}}
• {{jsxref("Array.prototype.some()")}}