if-async

if-async

async conditional execution for standalone or async.js use

Example 1: Using with Async.js

var async = require('async')
var ifAsync = require('if-async')

async.series([
    foo,
    ifAsync(predicate1).then(consequent1).else(else1),
    bar
])

function foo(callback) { ... }
function predicate1(callback) { fs.stat(... callback ...) }
function consequent1(callback) { ... }
function else1(callback) { ... }
function bar(callback) { ... }

Example 2: Standalone usage

var ifAsync = require('if-async')

var functor = ifAsync(predicate).then(consequent).else(elseClause)

functor(function(err) {
    console.log('done')
})

function predicate(callback) { fs.stat(... callback ...) }
function consequent(callback) { ... }
function elseClause(callback) { ... }

API Reference

Using fluent interface

var functor = ifAsync(predicate1).then(consequent1).elseIf(predicate2).then(consequent2).else(defaultConsequent)

Using function arguments

var functor = ifAsync(predicate1, consequent1, predicate2, consequent2, defaultConsequent)