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mongo - couldn't connect to server 127.0.0.1:27017
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This case worked out for me, i had to do ~>sudo mongod --dbpath /dbpathlocation and then opened the new terminal to run mongo...
– Saji
Dec 8 '14 at 3:26
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Python __call__ special method practical example
...custom_validator(value):
#your validation logic
Django has some default built-in validators such as email validators, url validators etc., which broadly fall under the umbrella of RegEx validators. To implement these cleanly, Django resorts to callable classes (instead of functions). It implem...
Converting a JS object to an array using jQuery
...11, 22]
The same with an ES6 arrow function:
Object.keys(obj).map(key => obj[key])
With ES7 you will be able to use Object.values instead (more information):
var arr = Object.values(obj);
Or if you are already using Underscore/Lo-Dash:
var arr = _.values(obj)
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Javascript “this” pointer within nested function
...var std_obj = {
...
displayMe() {
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var doSomeEffects = () => {
^^^^^^^ ARROW FUNCTION
// In an arrow function, the 'this' pointer is interpreted lexically,
// so it will refer to the object as desired.
if (this.activeEffect=="fade") ...
Functional design patterns [closed]
...er it at all). The order in LYAH is better, because moving from Functors => Applicative Functors => Monads moves you gradually up the ladder of generality and power.
Chapter 14 covers Zippers - you can effectively think of these as container classes with a pointer to a specific piece of data, ...
How are everyday machines programmed?
...are the same thing.
Coca-cola machines, routers, etc. typically use a realtime OS like QNX, EMBOS, or sometimes RTlinux if you're lucky. Most of these are proprietary OS you license for lots of money, but they have C compilers, drivers to work with hardware, etc.
http://www.qnx.com/
http://www....
Explanation of the UML arrows
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Nice reference but to me a Menu -> MenuItem has the same relation like a Order -> OrderItem so both of them are Compositions.
– Ignacio Soler Garcia
Jun 28 '13 at 10:53
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How to test which port MySQL is running on and whether it can be connected to?
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Using Mysql client:
mysql> SHOW GLOBAL VARIABLES LIKE 'PORT';
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Mongoose populate after save
...ecPopulate, like so
const t = new MyModel(value)
return t.save().then(t => t.populate('my-path').execPopulate())
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How to install plugins to Sublime Text 2 editor?
...Text console. The console is accessed via the Ctrl+` shortcut or the View > Show Console menu. Once open, paste the appropriate Python code for your version of Sublime Text into the console.
Code for Sublime Text 3
import urllib.request,os; pf = 'Package Control.sublime-package'; ipp = sublime....