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Create an array filled with ones and having the same length and data type as a provided array.

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Apache-2.0 license

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About stdlib...

We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.

The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.

When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.

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onesLike

Create an array filled with ones and having the same length and data type as a provided array.

Usage

importonesLikefrom'https://cdn.jsdelivr.net/gh/stdlib-js/array-ones-like@esm/index.mjs';

onesLike( x[, dtype] )

Creates an array filled with ones and having the same length and data type as a provided arrayx.

varx=[1,2,3,4,5];vararr=onesLike(x);// returns [ 1, 1, 1, 1, 1 ]

The function supports the following data types:

float64: double-precision floating-point numbers (IEEE 754)
float32: single-precision floating-point numbers (IEEE 754)
complex128: double-precision complex floating-point numbers
complex64: single-precision complex floating-point numbers
int32: 32-bit two's complement signed integers
uint32: 32-bit unsigned integers
int16: 16-bit two's complement signed integers
uint16: 16-bit unsigned integers
int8: 8-bit two's complement signed integers
uint8: 8-bit unsigned integers
uint8c: 8-bit unsigned integers clamped to0-255
generic: generic JavaScript values

By default, the output array data type is inferred from the provided arrayx. To return an array having a different data type, provide adtype argument.

varx=[0,0];vararr=onesLike(x,'int32');// returns <Int32Array>[ 1, 1 ]

Notes

If the output array has a complex number data type, each element of the returned array has a real component equal to1 and an imaginary component equal to0.

Examples

<!DOCTYPE html><htmllang="en"><body><scripttype="module">importdtypesfrom'https://cdn.jsdelivr.net/gh/stdlib-js/array-dtypes@esm/index.mjs';importzerosfrom'https://cdn.jsdelivr.net/gh/stdlib-js/array-zeros@esm/index.mjs';importonesLikefrom'https://cdn.jsdelivr.net/gh/stdlib-js/array-ones-like@esm/index.mjs';// Create a zero-filled array:varx=zeros(4,'complex128');// Get a list of array data types:vardt=dtypes();// Generate filled arrays...vary;vari;for(i=0;i<dt.length;i++){y=onesLike(x,dt[i]);console.log(y);}</script></body></html>

Notice

This package is part ofstdlib, a standard library with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to developstdlib, see the main projectrepository.