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Why is String immutable in Java?
...mizes your String objects, it sees that if two objects have same value (a="test", and b="test") and thus you need only one string object (for both a and b, these two will point to the same object).
Class loading: String is used as arguments for class loading. If mutable, it could result in wrong cla...
How to architect an Ember.js application
... files, along with other things like Broccoli for assets and PhantomJS for testing...
– JKillian
Apr 20 '15 at 21:14
F...
Python regular expressions return true/false
...h objects are always true, and None is returned if there is no match. Just test for trueness.
if re.match(...):
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The simplest way to comma-delimit a list?
...ry loop, but I bet it's more efficient than an if. Most solutions repeat a test we know won't be true - though inefficient, they're probably the clearest. Thanks for the link!
– 13ren
Mar 21 '09 at 12:03
...
Debug vs. Release performance
...ertion about the performance impact of a change is to try it both ways and test it under realistic-but-controlled conditions.
You're asking a question about performance, so clearly you care about performance. If you care about performance then the right thing to do is to set some performance goals ...
Can I call jquery click() to follow an link if I haven't bound an event handler to it with bind
...his might be the wanted behavior, but I don't think so.
EDIT:
I did some testing and what you said is wrong, even if you bind a function to an 'a' tag it still doesn't take you to the website specified by the href attribute. Try the following code:
<html>
<head>
<script src="http:...
UICollectionView reloadData not functioning properly in iOS 7
... I'm not sure if I can explain more. After searching, researching, testing and probing. I feel this is an iOS 7 bug. Forcing the main thread will run all UIKit related messages. I seem to run into this when popping to the view from another view controller. I refresh the data on viewWillApp...
How to delete from a text file, all lines that contain a specific string?
...temp && mv temp file
Ruby (1.9+)
ruby -i.bak -ne 'print if not /test/' file
Perl
perl -ni.bak -e "print unless /pattern/" file
Shell (bash 3.2 and later)
while read -r line
do
[[ ! $line =~ pattern ]] && echo "$line"
done <file > o
mv o file
GNU grep
grep -v "patt...
How to use http.client in Node.js if there is basic authorization
...ername:password combination which gets encoded in Base64:
var username = 'Test';
var password = '123';
var auth = 'Basic ' + Buffer.from(username + ':' + password).toString('base64');
// new Buffer() is deprecated from v6
// auth is: 'Basic VGVzdDoxMjM='
var header = {'Host': 'www.example.com', '...
What's the difference between equal?, eql?, ===, and ==?
... true if obj and other refer to the same hash key. This is used by Hash to test members for equality. For objects of class Object, eql? is synonymous with ==. Subclasses normally continue this tradition by aliasing eql? to their overridden == method, but there are exceptions. Numeric types, for exam...