Function foreach

foreach varName aList aBlock

Executes a block of code for each of the elements in a list.

Parameters:

varName - Symbol identifying a variable inside the code block aBlock that that will take the value of each of the elements in the list.

aList - A list of objects of any type.

aBlock - Block of code that will be executed for every element in aList.

Returns:

The result of the last execution of aBlock or the null object if aBlock never is executed.

The foreach function executes aBlock as many times as the number of elements in aList. Every time aBlock gets executed a variable identified by the symbol varName is initialized inside aBlock with a reference to one of the elements in aList, in the same order they appear in aList.

If you ignore the return value you could define the foreach function like this:

	define foreach ( varName aList aBlock ) {
	    map [lambda ( $varName ) $aBlock] $aList
	}