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Copy and rename specified keys for every element in a provided array.
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stdlib-js/array-base-rekey
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About stdlib...
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Copy and rename specified keys for every element in a provided array.
npm install @stdlib/array-base-rekey
Alternatively,
- To load the package in a website via a
scripttag without installation and bundlers, use theES Module available on theesmbranch (seeREADME). - If you are using Deno, visit the
denobranch (seeREADME for usage intructions). - For use in Observable, or in browser/node environments, use theUniversal Module Definition (UMD) build available on the
umdbranch (seeREADME).
Thebranches.md file summarizes the available branches and displays a diagram illustrating their relationships.
To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.
varrekey=require('@stdlib/array-base-rekey');
Copies and renames specified keys for every element in a provided array.
varx=[{'x':1,'y':2},{'x':3,'y':4}];varmapping={'x':'a','y':'b'};varout=rekey(x,mapping);// returns [ { 'a': 1, 'b': 2 }, { 'a': 3, 'b': 4 } ]
The function has the following parameters:
- arr: input array.
- mapping: object mapping existing keys to new key names.
- The functiononly copies and renames those keys which are present in a provided mapping object. Any keys which arenot present in the provided mapping object, but are present in the original objects, areomitted during object creation.
- The function assumes that each object has the keys specified in a provided mapping object.
- The function performsshallow copies of key values.
vardiscreteUniform=require('@stdlib/random-base-discrete-uniform');varfilledBy=require('@stdlib/array-base-filled-by');varrekey=require('@stdlib/array-base-rekey');functionclbk(idx){return{'x':idx,'y':discreteUniform(0,10)};}varx=filledBy(10,clbk);varmapping={'x':'a','y':'b'};varout=rekey(x,mapping);// returns [...]
This package is part ofstdlib, a standard library for JavaScript and Node.js, 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.
SeeLICENSE.
Copyright © 2016-2025. The StdlibAuthors.
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