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@stdlib/array-base-accessor
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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.
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Create a minimal array-like object supporting the accessor protocol from another array-like object.
npm install @stdlib/array-base-accessor
var AccessorArray = require( '@stdlib/array-base-accessor' );
Creates a minimal array-like object supporting the accessor protocol from another array-like object.
var arr = new AccessorArray( [ 1, 2, 3 ] );
// returns <AccessorArray>
Number of array elements.
var arr = new AccessorArray( [ 1, 2, 3 ] );
// returns <AccessorArray>
var len = arr.length;
// returns 3
Returns an array element located at position (index) i
.
var arr = new AccessorArray( [ 1, 2, 3 ] );
// Get the first element:
var v = arr.get( 0 );
// returns 1
Set an array element.
var arr = new AccessorArray( [ 1, 2, 3 ] );
// Get the first element:
var v = arr.get( 0 );
// returns 1
// Set the first element:
arr.set( 5 );
// Get the first element:
v = arr.get( 0 );
// returns 5
By default, the method sets array elements starting at position (index) i = 0
. To set elements starting elsewhere in the array, provide an index argument i
.
var arr = new AccessorArray( [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ] );
// Get the fifth element:
var v = arr.get( 4 );
// returns 5
// Set the fifth element:
arr.set( 11, 4 );
// Get the fifth element:
v = arr.get( 4 );
// returns 11
var AccessorArray = require( '@stdlib/array-base-accessor' );
// Define a class for creating a minimal sparse array-like object...
function SparseArray( len, values ) {
this.length = len;
this._data = values;
return this;
}
SparseArray.prototype.get = function get( i ) {
var v = this._data[ i ];
if ( v === void 0 ) {
return 0;
}
return v;
};
SparseArray.prototype.set = function set( v, i ) {
this._data[ i ] = v;
};
// Define a function for printing the contents of an array and which assumes accessor protocol support:
function printArray( name, x ) {
var i;
for ( i = 0; i < x.length; i++ ) {
console.log( '%s[%d] = %d', name, i, x.get( i ) );
}
}
// Create a sparse array-like object:
var sparse = new SparseArray( 10, {
'2': 1,
'3': 2,
'8': 3
});
// Create a dense array:
var arr = [ 0, 0, 1, 2, 0, 0, 0, 0, 3, 0 ];
// Convert the dense array to an accessor array to allow for uniform iteration:
var dense = new AccessorArray( arr );
// Print the contents of each array...
printArray( 'sparse', sparse );
printArray( 'dense', dense );
This package is part of stdlib, 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 develop stdlib, see the main project repository.
See LICENSE.
Copyright © 2016-2024. The Stdlib Authors.
FAQs
Create a minimal array-like object supporting the accessor protocol from another array-like object.
The npm package @stdlib/array-base-accessor receives a total of 160 weekly downloads. As such, @stdlib/array-base-accessor popularity was classified as not popular.
We found that @stdlib/array-base-accessor demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 4 open source maintainers collaborating on the project.
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