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Lambda Expressions
Lucee 5 supports lambda expressions which are shorthand for defining anonymous functions.
Lambda expressions reduce much of the syntax around creating anonymous functions. In its simplest form, you can eliminate the function
keyword, curly braces and return
statement. Lambda expressions implicitly return the results of the expression body.
A simple lambda expression with no arguments:
#!javascript // Using a traditional function makeSix = function() { return 5 + 1; } // Using a lambda expression makeSix = () -> 5 + 1; // returns 6 dump(makeSix());
A simple lambda expression with multiple arguments:
#!javascript // Takes two numeric values and adds them add = (numeric x, numeric y) -> x + y; // returns 4 dump(add(1, 3));
A complex lambda expression with an argument:
#!javascript // Takes a numeric value and returns a string isOdd = (numeric n) -> { if ( n % 2 == 0 ) { return 'even'; } else { return 'odd'; } }; // returns 'odd' dump(isOdd(1)); // returns 'even' dump(isOdd(10));
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