ArrayReduce
Run the provided udf over the array to reduce the values to a single output
Method Signature
ArrayReduce(array=[array], callback=[function:BiFunction], initialValue=[any])Arguments
Argument
Type
Required
Description
Default
array
array
true
The array to reduce
callback
function:BiFunction
true
The function to invoke for each item. The function will be passed 3 arguments: the accumulator, the current item, and the current index. You can alternatively pass a Java BiFunction which will only receive the first 2 args. The function should return the new accumulator value.
initialValue
any
false
The initial value of the accumulator
Examples
Simple arrayReduce Example
Sum each a element in the array
complexData = [
{
A : 4
},
{
A : 18
},
{
A : 51
}
];
sum = arrayReduce( complexData, ( Any prev, Any element ) => {
return prev + element.A;
}, 0 );
writeOutput( sum );
Result: 73
Additional Examples
reduced = ArrayReduce( [
1,
2,
3,
4
], ( Any carry, Any value ) => {
return carry + value;
}, 0 );
dump( reduced ); // yields 10
reduced = ArrayReduce( [
"hello",
"there",
"boxlang"
], ( Any carry, Any value ) => {
return carry & " " & value;
}, "" );
dump( reduced );
// yields 'hello there boxlang'
Related
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