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Transform a function into a sequence of functions each accepting a single argument.
To use in Observable,
curry = require( 'https://cdn.jsdelivr.net/gh/stdlib-js/utils-curry@umd/browser.js' )To vendor stdlib functionality and avoid installing dependency trees for Node.js, you can use the UMD server build:
var curry = require( 'path/to/vendor/umd/utils-curry/index.js' )To include the bundle in a webpage,
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/utils-curry@umd/browser.js"></script>If no recognized module system is present, access bundle contents via the global scope:
<script type="text/javascript">
(function () {
window.curry;
})();
</script>Transforms a function into a sequence of functions each accepting a single argument.
function add( x, y ) {
return x + y;
}
var fcn = curry( add );
var sum = fcn( 2 )( 3 );
// returns 5By default, arity is equal to fcn.length. For functions without explicit parameters, provide an arity argument.
function add() {
return arguments[ 0 ] + arguments[ 1 ];
}
var fcn = curry( add, 2 );
var sum = fcn( 2 )( 3 );
// returns 5To specify the curried function execution context, provide a thisArg argument.
var obj = {
'name': 'Ada',
'greet': function greet( word1, word2 ) {
return word1 + ' ' + word2 + ', ' + this.name + '!';
}
};
var fcn = curry( obj.greet, obj );
var str = fcn( 'Hello' )( 'there' );
// returns 'Hello there, Ada!'The function supports providing both an arity and execution context.
var obj = {
'name': 'Ada',
'greet': function greet() {
return arguments[ 0 ] + ' ' + arguments[ 1 ] + ', ' + this.name + '!';
}
};
var fcn = curry( obj.greet, 2, obj );
var str = fcn( 'Hello' )( 'there' );
// returns 'Hello there, Ada!'-
Until return value resolution, each invocation returns a new partially applied curry function.
function add( x, y, z ) { return x + y + z; } var fcn = curry( add ); var s0 = fcn( 1 )( 2 )( 3 ); // returns 6 s0 = fcn( -1 )( -2 )( -3 ); // returns -6 s0 = fcn( 10 )( 20 )( 30 ); // returns 60 // Return a partially applied curry function: var f1 = fcn( 3 ); var s1 = f1( 4 )( 5 ); // returns 12 s1 = f1( 6 )( 7 ); // returns 16 s1 = f1( 8 )( 9 ); // returns 20 // Return a partially applied curry function: var f2 = fcn( 4 )( 5 ); var s2 = f2( 6 ); // returns 15 s2 = f2( 70 ); // returns 79 s2 = f2( 700 ); // returns 709
<!DOCTYPE html>
<html lang="en">
<body>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/utils-curry@umd/browser.js"></script>
<script type="text/javascript">
(function () {
var fcn;
var out;
var i;
function add( x, y, z, w, t, s ) {
return x + y + z + w + t + s;
}
fcn = curry( add );
out = fcn;
for ( i = 0; i < add.length; i++ ) {
out = out( i*10 );
}
console.log( out );
})();
</script>
</body>
</html>@stdlib/utils-curry-right: transform a function into a sequence of functions each accepting a single argument.@stdlib/utils-uncurry: transform a curried function into a function invoked with multiple arguments.@stdlib/utils-uncurry-right: transform a curried function into a function invoked with multiple arguments.
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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