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How to check that an element is in a std::set?
...nt if(container.insert(foo).second) {...} has the charm that it needs just one single tree lookup...
– Aconcagua
Dec 1 '16 at 14:20
25
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What is the difference between require_relative and require in Ruby?
...id.
require will most likely be used to bring in code from a library someone else wrote.
for example, what if you want to use one of the helper functions provided in the active_support library? you'll need to install the gem with gem install activesupport and then in the file require 'active_su...
Pattern to avoid nested try catch blocks?
...fail with an exception. In order to attempt each calculation until we find one that succeeds, I have been doing the following:
...
Bootstrap 3 Navbar Collapse
...trap 4
It's a native functionality: https://getbootstrap.com/docs/4.0/components/navbar/#responsive-behaviors
You have to use .navbar-expand{-sm|-md|-lg|-xl} classes:
<nav class="navbar navbar-expand-md navbar-light bg-light">
Bootstrap 3
@media (max-width: 991px) {
.navbar-header {
...
git - Server host key not cached
...t's precisely what the error message is referring to. In my case when I cloned I had used a FQDN, but on my new machine I had only logged in using the short local domain name. I had to login via putty or plink as the FQDN to cache the key for the host name on the origin. It can help to cross chec...
Copy array by value
...lice();
console.log({newArray});
Basically, the slice() operation clones the array and returns a reference to a new array.
Also note that:
For references, strings and numbers (and not the actual object), slice() copies object references into the new array. Both the original and new array refe...
How can I truncate a datetime in SQL Server?
...floor them to remove the fraction, and the time portion of the values are gone when you cast them back to datetime. It's all just bit shifting with no complicated logic and it's very fast.
Be aware this relies on an implementation detail Microsoft is free to change at any time, even in an automati...
What's the _ underscore representative of in Swift References?
...be as clear as it's possible - so the first parameter's underscore is mentioned for EVERY method. That would explain everything)
– Dmitry Gryazin
Sep 24 '15 at 13:19
4
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Is it bad practice to use Reflection in Unit testing? [duplicate]
...y.
Update: as @tackline noted, this concerns only using Reflection within one's own test code, not the internals of the testing framework. JUnit (and probably all other similar frameworks) uses reflection to identify and call your test methods - this is a justified and localized use of reflection. ...
How to take screenshot of a div with JavaScript?
...ass image into php script, which adds appropriate headers
Example "all-in-one" script script.php
<?php if(isset($_GET['image'])):
$image = $_GET['image'];
if(preg_match('#^data:image/(.*);base64,(.*)$#s', $image, $match)){
$base64 = $match[2];
$imageBody = base64_decode...