node-vargs
v0.0.4
Published
node.js variable arguments simplified
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Readme
node-vargs
Optional arguments made easy.
Purpose
Purpose of this module is to handle optional arguments easily and efficiently.
Installation
npm install node-vargs --save
Run tests
npm test
Run coverage
npm run cover
Examples
optional arguments
"use strict";
var vargs = require('node-vargs');
function getUserList(age, sex, callback) {
// called with getUserList(18, function(list) {});
var args = vargs(arguments, 3);
age = args.arg1 || 0;
sex = args.arg2 || 'female';
callback = args.arg3;
console.log(age); // 18
console.log(sex); // female
callback([12, 18]);
}
getUserList(18, function(result) {
console.log(result); // [12, 18];
});
// NOTE: number of arguments passed is totoal number of arguments, including callback
optional arguments with default value
"use strict";
var vargs = require('node-vargs');
function makePicture(color, shape, options) {
// called with makePicture('Orange');
var args = vargs(arguments, ['Red', 'Rectangle', {create_new : true}]);
console.log(args.arg1); // Orange
console.log(args.arg2); // Rectangle
console.log(args.arg3); // {create_new : true}
}
makePicture('Orange');
// NOTE: total number of elements in default values array must match total number of arguments
// in function, including callback. See example below
optional arguments with default value and callback
"use strict";
var vargs = require('node-vargs');
function makePicture(color, shape, options, callback) {
// called with makePicture('Orange');
var args = vargs(arguments, ['Red', 'Rectangle', {create_new : true}, function(picture) { }]);
console.log(args.arg1); // Orange
console.log(args.arg2); // Rectangle
console.log(args.arg3); // {create_new : true}
}
makePicture('Orange');
For more details, see test/vargs.test.js