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When to use symbols instead of strings in Ruby?
...utput, you should go with strings, even if it appears more than once, even allocating two different objects in memory.
Here's the reasoning:
Printing the symbols will be slower than printing strings because they are cast to strings.
Having lots of different symbols will increase the overall mem...
django - why is the request.POST object immutable?
... allow substantial optimizations. An object is immutable means that we can allocate space for it at creation time, and the space requirements are not changing. It also has things like copy efficiency and comparison efficiency because of it.
Edit: this is not the case for QueryDict as Gareth Rees p...
ActionBarCompat: java.lang.IllegalStateException: You need to use a Theme.AppCompat
...). This is the phone: http://www.gsmarena.com/samsung_galaxy_y_s5360-4117.php
13 Answers
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What are the differences between ArrayList and Vector?
...%, you can avoid this by ensurecapacity() method to make sure that you are allocating sufficient memory at the initial stages itself.
Hope it helps.
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How does this checkbox recaptcha work and how can I use it?
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Here is my code running without problem in PHP:
Client Side:
<div class="g-recaptcha" data-sitekey="PUBLIC_KEY"></div>
Server Side:
if (isset($_POST['g-recaptcha-response'])) {
$captcha = $_POST['g-recaptcha-response'];
$privatekey = "SECRET_K...
What is the exact problem with multiple inheritance?
...t – or have used it very badly. Judging MI by C++ is like judging OOP by PHP or judging automobiles by Pintos.
– Jörg W Mittag
Dec 13 '08 at 12:40
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How to store arrays in MySQL?
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Use database field type BLOB to store arrays.
Ref: http://us.php.net/manual/en/function.serialize.php
Return Values
Returns a string containing a byte-stream representation of value that
can be stored anywhere.
Note that this is a binary string which may include null bytes, and
needs ...
What is the meaning of the /dist directory in open source projects?
...JS packages, used by Npm.
vendor/: includes libraries and dependencies for PHP packages, used by Composer.
bin/: files that get added to your PATH when installed.
Markdown/Text Files:
README.md: A help file which addresses setup, tutorials, and documents the project. README.txt is also used.
LIC...
How do I connect to a MySQL Database in Python?
...1 - Setting
You must install a MySQL driver before doing anything. Unlike PHP, Only the SQLite driver is installed by default with Python. The most used package to do so is MySQLdb but it's hard to install it using easy_install. Please note MySQLdb only supports Python 2.
For Windows user, you can...
Basic HTTP authentication with Node and Express 4
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Use Buffer.from() // for strings or Buffer.alloc() // for numbers as Buffer() is deprecated due to security issues.
– Mr. Alien
Feb 25 at 6:56
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