Package Exports

execon

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (execon) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

Execon

Patterns of function calls.

Install

NPM_INFO

npm i execon --save
# or
bower i execon --save

Api

var exec = require('execon');

exec

Check is parameter is function, if it's - executes it with given parameters

Was:

function(callback, p1, p2, pN) {
    if (typeof callback === 'function')
        callback(p1, p2, pN);
}

Now

function(callback, p1, p2, pN) {
    exec(callback, p1, p2, pN);
}

or just

exec.ret(callback, p1, p2, pN);

exec.if

Conditional execution one of two functions

Preconditions:

function one() {
    console.log(1);
}

function two(callback) {
    setTimeout(callback, 1000);
}

Before:

if (2 > 3)
    one();
else
    two(one);

After:

exec.if(2 > 3, one, two);

exec.parallel

if a you need a couple async operation do same work, and then call callback, this function for you.

Node.js example.

var fs      = require('fs'),
    Util    = require('execon');

exec.parallel([
    function(callback) {
        fs.readFile('file1', callback);
    },
    function(callback) {
        fs.readFile('file2',  callback);
    }
], function(error, data1, data2) {
    if (error)
        console.log(error)
    else
        console.log(data1, data2);
});

Vanilla js example.

var ONE_SECOND  = 1000,
    TWO_SECONDS = 2000,
    func        = function(time, str, callback) {
        setTimeout(function() {
            console.log(str);
            callback(null, str);
        }, time);
    },
    
    func1       = func.bind(null, TWO_SECONDS, 'first'),
    func2       = func.bind(null, ONE_SECOND, 'second');

exec.parallel([func1, func2], function(error, str1, str2) {
    console.log(str1, str2);
});

exec.series

executes functions one-by-one

function one(callback){
    setTimeout(function() {
        console.log(1)
        callback();
    }, 1000);
}

function two(callback) {
    console.log(2);
    callback();
}

exec.series([one, two], function(error) {
    console.log(error || 'done');
});

License

MIT