fluid.accumulate(list,

fn,

arg)

Section
Column width 70% Scans through a list of objects, "accumulating" a value over them (may be a straightforward "sum" or some other chained computation). The results will be added to the initial value passed in by "arg" and returned Code Block javascript javascript fluid.accumulate(list, fn, arg);

{code} *

File

name:

* {{

Fluid.js

}} h2. Parameters {span:class=

Parameters Span class borderless-table

} |*{{list}}*|

list (Array)

The

list

of

objects

to

be

accumulated

over.

| |*{{fn}}*|

fn (Function)

An

"accumulation

function"

accepting

the

signature

(object,

total,

index)

where

object

is

the

list

member,

total

is

the

"running

total"

object

(which

is

the

return

value

form

the

previous

function),

and

index

is

the

index

number.

| |*{{arg}}*|

arg (Object)

The

initial

value

for

the

"running

total"

object.

| {span} h2. Return Value {span:class=borderless-table} |*Object*| The modified {{arg}} object. | {span} {column} {column:width=5%} {column} {column} h3. See Also {column} {section} ---- h3. Notes To a Google developer, this would be "reduce", from the

Return Value Span class borderless-table Object The modified arg object. Column width 5% Column See Also

---

Notes

To a Google developer, this would be "reduce", from the "map/reduce"

pairing.

Example

var func = function (column, list) {
    return list.concat(column.elements);
};
var modules = fluid.accumulate(layout.columns, func, [])

In

this

example,

the

function

func

will

add

the

elements

property

of

each

entry

of

list.columns

to

an

initially

empty

array

and

return

the

filled

array.