
Security News
Deno 2.4 Brings Back deno bundle, Improves Dependency Management and Observability
Deno 2.4 brings back bundling, improves dependency updates and telemetry, and makes the runtime more practical for real-world JavaScript projects.
is-index-x
Advanced tools
Determine whether the passed value is a zero based index.
module.exports(value, [length])
⇒ boolean
⏏This method determines whether the passed value is a zero based index. JavaScript arrays are zero-indexed: the first element of an array is at index 0, and the last element is at the index equal to the value of the array's length property minus 1.
Kind: Exported function
Returns: boolean
- A Boolean indicating whether or not the given value is a
zero based index within bounds.
Param | Type | Default | Description |
---|---|---|---|
value | number | string | The value to be tested for being a zero based index. | |
[length] | number | MAX_SAFE_INTEGER | The length that sets the upper bound. |
Example
import isIndex from 'is-index-x';
console.log(isIndex(0)); // true
console.log(isIndex(1)); // true
console.log(isIndex('10')); // true
console.log(isIndex(-100000)); // false
console.log(isIndex(2 ** 53)); // false
console.log(isIndex(0.1)); // false
console.log(isIndex(Math.PI)); // false
console.log(isIndex(NaN)); // false
console.log(isIndex(Infinity)); // false
console.log(isIndex(-Infinity)); // false
console.log(isIndex(true)); // false
console.log(isIndex(false)); // false
console.log(isIndex([1])); // false
console.log(isIndex(10, 10)); // false
FAQs
Determine whether the passed value is a zero based index.
The npm package is-index-x receives a total of 7,690 weekly downloads. As such, is-index-x popularity was classified as popular.
We found that is-index-x demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
Deno 2.4 brings back bundling, improves dependency updates and telemetry, and makes the runtime more practical for real-world JavaScript projects.
Security News
CVEForecast.org uses machine learning to project a record-breaking surge in vulnerability disclosures in 2025.
Security News
Browserslist-rs now uses static data to reduce binary size by over 1MB, improving memory use and performance for Rust-based frontend tools.