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Difference between & and && in Java? [duplicate]
I was just wondering what the difference between & and && is?
A few days I wrote a condition for an if statement the looked something like:
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How to get Git to clone into current directory
...hub.com:user/my-project.git .
From git help clone:
Cloning into an existing directory is only allowed if the directory is empty.
So make sure the directory is empty (check with ls -a), otherwise the command will fail.
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CSS: Animation vs. Transition
...I understand how to perform both CSS3 transitions and animations . What is not clear, and I've googled, is when to use which.
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What does Python's eval() do?
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edited Jun 12 '18 at 21:03
Simon
8,00988 gold badg...
When saving, how can you check if a field has changed?
..._ method of models.Model so that you keep a copy of the original value. This makes it so that you don't have to do another DB lookup (which is always a good thing).
class Person(models.Model):
name = models.CharField()
__original_name = None
def __init__(self, *args, **kwargs):
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“Single-page” JS websites and SEO
...king powerful "single-page" JavaScript websites nowadays. In my opinion, this is done right by letting the server act as an API (and nothing more) and letting the client handle all of the HTML generation stuff. The problem with this "pattern" is the lack of search engine support. I can think of two ...
How do I read any request header in PHP
...you only need a single header, instead of all headers, the quickest method is:
<?php
// Replace XXXXXX_XXXX with the name of the header you need in UPPERCASE (and with '-' replaced by '_')
$headerStringValue = $_SERVER['HTTP_XXXXXX_XXXX'];
ELSE IF: you run PHP as an Apache module or, as of PH...
How to navigate through textfields (Next / Done Buttons)
...n, where you can ask the text field what control should have focus next. This is what makes tabbing between text fields work. But since iOS devices do not have a keyboard, only touch, this concept has not survived the transition to Cocoa Touch.
This can be easily done anyway, with two assumptions:
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Link to reload current page
Is it possible to have a normal link pointing to the current location?
21 Answers
21
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Should you always favor xrange() over range()?
...performance, especially when you're iterating over a large range, xrange() is usually better. However, there are still a few cases why you might prefer range():
In python 3, range() does what xrange() used to do and xrange() does not exist. If you want to write code that will run on both Python ...