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// create new function based on existing one with one or more pre-defined arguments
var 

newFn = 

existingFn.

curry(args...);
 
// use the new function, optionally specifying additional arguments

var result = newFn(extraArgs...);

function add(a, b) {
  return a + b;
}
 
var Add5To = add.curry(5); // parameter "a" is pre-defined with value 5
 
Add5To(10); // 15 (parameter "a" already set to 5, "b" set to 10)