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Normalize a
Sliceobject.
To use in Observable,
normalizeSlice = require( 'https://cdn.jsdelivr.net/gh/stdlib-js/slice-base-normalize-slice@umd/browser.js' )To vendor stdlib functionality and avoid installing dependency trees for Node.js, you can use the UMD server build:
var normalizeSlice = require( 'path/to/vendor/umd/slice-base-normalize-slice/index.js' )To include the bundle in a webpage,
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/slice-base-normalize-slice@umd/browser.js"></script>If no recognized module system is present, access bundle contents via the global scope:
<script type="text/javascript">
(function () {
window.normalizeSlice;
})();
</script>Normalizes a Slice object, where len specifies the maximum number of elements allowed in the slice.
var Slice = require( '@stdlib/slice-ctor' );
var s = normalizeSlice( new Slice( -1, null, -1 ), 10, false );
// returns <Slice>
var v = s.start;
// returns 9
v = s.stop;
// returns null
v = s.step;
// returns -1When strict is true, the function returns an error object if an input slice exceeds index bounds.
var Slice = require( '@stdlib/slice-ctor' );
var s = normalizeSlice( new Slice( -20, 20, 1 ), 10, true );
// returns { 'code': 'ERR_SLICE_OUT_OF_BOUNDS' }A returned error object may have one of the following error codes:
- ERR_SLICE_OUT_OF_BOUNDS: a slice exceeds index bounds.
<!DOCTYPE html>
<html lang="en">
<body>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/slice-ctor@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/slice-base-normalize-slice@umd/browser.js"></script>
<script type="text/javascript">
(function () {
var s = normalizeSlice( new Slice(), 5, false );
console.log( 'start: %s. stop: %s. step: %s.', s.start, s.stop, s.step );
// => 'start: 0. stop: 5. step: 1.'
s = normalizeSlice( new Slice( 1, 4, 2 ), 5, false );
console.log( 'start: %s. stop: %s. step: %s.', s.start, s.stop, s.step );
// => 'start: 1. stop: 4. step: 2.'
s = normalizeSlice( new Slice( -1, null, -1 ), 5, false );
console.log( 'start: %s. stop: %s. step: %s.', s.start, s.stop, s.step );
// => 'start: 4. stop: null. step: -1.'
s = normalizeSlice( new Slice( -10, -2, 2 ), 5, false );
console.log( 'start: %s. stop: %s. step: %s.', s.start, s.stop, s.step );
// => 'start: 0. stop: 3. step: 2.'
s = normalizeSlice( new Slice( 1, 20, 2 ), 5, false );
console.log( 'start: %s. stop: %s. step: %s.', s.start, s.stop, s.step );
// => 'start: 1. stop: 5. step: 2.'
})();
</script>
</body>
</html>@stdlib/slice-base/normalize-multi-slice: normalize a MultiSlice object.
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.
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