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Symfony2 : How to get form validation errors after binding the request to the form
... snippet in the class where you need this functionality it will be able to call itself. Your "fix" will prevent you to reach the nested forms. It worked for 37 other people, it should work for you too ;)
– Flip
Feb 13 '15 at 16:46
...
Java 8 Iterable.forEach() vs foreach loop
... now that lambdas are new. By "optimization" I do not mean the overhead of calling lambdas (which is small), but to the sophisticated analysis and transformation that the modern JIT compiler performs on running code.
If you do need parallelism, it is probably much faster and not much more difficul...
remove None value from a list without removing the 0 value
...
@DrMcCleod The expression x != y internally calls x.__ne__(y) where the ne stands for "not equal". So, None.__ne__ is a bound method that returns True when called with any value other than None. For example, bm = None.__ne__ called with bm(10) returns NotImplemented ...
Get the length of a String
...
Before Swift 2.0, count was a global function. As of Swift 2.0, it can be called as a member function.
test1.characters.count
It will return the actual number of Unicode characters in a String, so it's the most correct alternative in the sense that, if you'd print the string and count characters...
Difference between a class and a module
...ndom() on a Math module. But by their nature, a module's methods cannot be called on the module's own self. This has to do with Ruby's notion of self, its metaclasses, and how method lookup works. Check out "Metaprogramming Ruby" - Paolo Perlotta for details.
– scottburton11
...
Is it possible to ping a server from Javascript?
...other parts of the source but you get the idea).
function Pinger_ping(ip, callback) {
if(!this.inUse) {
this.inUse = true;
this.callback = callback
this.ip = ip;
var _that = this;
this.img = new Image();
this.img.onload = function() {_that.good();};
this.img.onerr...
Generate random numbers using C++11 random library
...m functions and why not to use rand(). In it, he included a slide that basically solves your question. I've copied the code from that slide below.
You can see his full talk here: http://channel9.msdn.com/Events/GoingNative/2013/rand-Considered-Harmful
#include <random>
#include <iostream&...
Wait 5 seconds before executing next line
...
You have to put your code in the callback function you supply to setTimeout:
function stateChange(newState) {
setTimeout(function () {
if (newState == -1) {
alert('VIDEO HAS STOPPED');
}
}, 5000);
}
Any other code will ...
How to scale Docker containers in production
...e 17
The Openstack project now has a new "container as a service" project called Magnum:
https://wiki.openstack.org/wiki/Magnum
Shows a lot of promise, enables the easy setup of Docker orchestration frameworks like Kubernetes and Docker swarm.
Update 18
Rancher is a project that is maturing r...
Is PowerShell ready to replace my Cygwin shell on Windows? [closed]
...Shell. NOTE - it is not an all or nothing deal. Within PowerShell, you can call out to your Unix tools (and use their text process or PowerShell's text processing). Also you can call PowerShell from your Unix tools and get text.
Again - there is no religion here - our focus is on giving you the too...