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* @license Apache-2.0
*
* Copyright (c) 2019 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MODULES //
var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
var alias2pkg = require( '@stdlib/namespace/alias2pkg' );
var startsWith = require( '@stdlib/string/starts-with' );
var format = require( '@stdlib/string/format' );
var ALIASES = require( './../data/data.json' );
// VARIABLES //
var PKGS; // lazily defined
// FUNCTIONS //
/**
* Resolves package names for all aliases.
*
* @private
* @returns {ArrayArray} pairs of package names and corresponding aliases
*/
function resolvePackages() {
var i;
if ( PKGS ) {
return PKGS;
}
PKGS = [];
for ( i = 0; i < ALIASES.length; i++ ) {
PKGS.push( [ alias2pkg( ALIASES[i] ), ALIASES[i] ] );
}
return PKGS;
}
// MAIN //
/**
* Returns a list of standard library aliases.
*
* @param {string} [namespace] - namespace filter
* @throws {TypeError} must provide a string
* @returns {Array} list of aliases
*
* @example
* var list = aliases();
* // returns [...]
*
* @example
* var list = aliases( '@stdlib/math/base/special' );
* // returns [...]
*/
function aliases( namespace ) {
var pkgs;
var out;
var i;
var p;
if ( arguments.length === 0 ) {
return ALIASES.slice();
}
if ( !isString( namespace ) ) {
throw new TypeError( format( 'invalid argument. Must provide a string. Value: `%s`.', namespace ) );
}
pkgs = resolvePackages();
out = [];
for ( i = 0; i < pkgs.length; i++ ) {
p = pkgs[ i ];
if ( p[ 0 ] && startsWith( p[ 0 ], namespace ) ) {
out.push( p[1] );
}
}
return out;
}
// EXPORTS //
module.exports = aliases;
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