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Transform a function into a sequence of functions each accepting a single argument.
npm install @stdlib/utils-curry-right
var curryRight = require( '@stdlib/utils-curry-right' );
Transforms a function into a sequence of functions each accepting a single argument.
function add( x, y ) {
return x + y;
}
var fcn = curryRight( add );
var sum = fcn( 2 )( 3 );
// returns 5
By 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 = curryRight( add, 2 );
var sum = fcn( 2 )( 3 );
// returns 5
To 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 = curryRight( obj.greet, obj );
var str = fcn( 'there' )( 'Hello' );
// 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 = curryRight( obj.greet, 2, obj );
var str = fcn( 'there' )( 'Hello' );
// 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 = curryRight( 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
-
The difference between this function and
curry
is the order in which arguments are applied. This function applies arguments starting from the right.
var curryRight = require( '@stdlib/utils-curry-right' );
var fcn;
var out;
var i;
function add( x, y, z, w, t, s ) {
return x + y + z + w + t + s;
}
fcn = curryRight( add );
out = fcn;
for ( i = 0; i < add.length; i++ ) {
out = out( i*10 );
}
console.log( out );
-
@stdlib/utils-curry
: 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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