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Using margin:auto to vertically-align a div
...swer.
You can't use:
vertical-align:middle because it's not applicable to block-level elements
margin-top:auto and margin-bottom:auto because their used values would compute as zero
margin-top:-50% because percentage-based margin values are calculated relative to the width of containing block
In f...
What is the Ruby (spaceship) operator?
... operator most likely originated, it was used mainly to simplify the "sort BLOCK LIST" syntax. The BLOCK is a subroutine that can return any positive number, negative number, or 0 depending on how the list items should be sorted. Spaceship operator is convenient to use in the block.
...
How to create a directory if it doesn't exist using Node.js?
... performing this operation on app boot or initialization, then its fine to block execution as you'd do the same thing if you were to do it async. If you're making a directory as a recurring operation then its bad practice but probably won't cause any performance issue, but its a bad habbit none-the-...
Choose between ExecutorService's submit and ExecutorService's execute
...n in the framework itself unless you embed your task code in try{} catch{} block.
Example code: This code swallows Arithmetic exception : / by zero.
import java.util.concurrent.*;
import java.util.*;
public class ExecuteSubmitDemo{
public ExecuteSubmitDemo()
{
System.out.println("...
What's the point of NSAssert, actually?
...
Note that XCode 4 has NS_BLOCK_ASSERTIONS defined by default in release configurations. I guess if you don't change that your released code will not contain NSAssert:s.
– Jonny
Nov 29 '11 at 2:52
...
What is the use of the pipe symbol in YAML?
...s a tricky one: It's because indentation should be relative to the current block-level element. So in this case it should be 4+ instead of 6+ because the last block-level element is the array item (specified by -) and the literal is indented 4 from it. Somewhat surprisingly the final: | mapping is...
How can bcrypt have built-in salts?
...es as long as a cost factor of 10 does. To clear up other misinformation, PHP's crypt function uses the unix crypt library which is implemented in c.
– thomasrutter
Jul 3 '12 at 13:02
...
What are queues in jQuery?
... +1. I'm working on a jQuery-based user script that needs to connect to a PHP script as if it were another PHP script running on the client -- one HTTP request/other operation at a time, so this will definitely be helpful. Just a question: jQuery requires that queues be attached to objects, right? ...
Should a return statement be inside or outside a lock?
... value before it's returned it the return statement is outside of the lock block. Dangerous!
– Torbjørn
Feb 15 '10 at 14:37
...
RSpec: What is the difference between a feature and a request spec?
...ing responses - e.g. in a sessions_spec I may have a describe "GET /login" block with expectations in it blocks such as expect(response.status).to eq(200) and expect(response).to render_template(:new), or in a describe "POST /sessions", a context "with valid credentials" block, with expect(response)...