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What is Java String interning?
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http://docs.oracle.com/javase/7/docs/api/java/lang/String.html#intern()
Basically doing String.intern() on a series of strings will ensure that all strings having same contents share same memory. So if you have list of names...
Rails 3 check if attribute changed
...rray).
You can check APIDock for which versions supported these methods.
http://apidock.com/rails/ActiveModel/Dirty
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How to write Unicode characters to the console?
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Console.OutputEncoding Property
http://msdn.microsoft.com/library/system.console.outputencoding(v=vs.110).aspx
Note that successfully displaying Unicode characters to the console requires the following:
The console must use a TrueType font, such as Lucid...
How to fix error with xml2-config not found when installing PHP from sources?
...able from source on Ubuntu (downloading compressed installation file from http://www.php.net/downloads.php ) and I run ./configure I get this error:
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What type of hash does WordPress use?
...y for me, no more. You can generate hashes using this encryption scheme at http://scriptserver.mainframe8.com/wordpress_password_hasher.php.
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How do I get the picture size with PIL?
... resizing...
import requests
h = { 'User-Agent': 'Neo'}
r = requests.get("https://images.freeimages.com/images/large-previews/85c/football-1442407.jpg", headers=h)
from PIL import Image
from io import BytesIO
# create image from binary content
i = Image.open(BytesIO(r.content))
width, height = i...
Android WebView style background-color:transparent ignored on android 2.2
...Data = StringHelper.addSlashes("<!DOCTYPE html><head> <meta http-equiv=\"Content-Type\" " +
"content=\"text/html; charset=utf-8\"> </head><body><div style=\"background-color: rgba(10,10,10,0.5); " +
"padding: 20px; height: 260px; border-radius: 8px;\">...
Jquery selector input[type=text]')
....})
Note: Internally jQuery will convert the above to find() equivalent
http://api.jquery.com/jQuery/
Internally, selector context is implemented with the .find() method,
so $('span', this) is equivalent to $(this).find('span').
I personally find the first alternative to be the most reada...
Create an index on a huge MySQL production table without table locking
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[2017] Update: MySQL 5.6 has support for online index updates
https://dev.mysql.com/doc/refman/8.0/en/innodb-online-ddl-operations.html#online-ddl-index-syntax-notes
In MySQL 5.6 and higher, the table remains available for read and write operations while the index is being created o...
Remove last item from array
...t('[' + arr + ']');
$('#div2').text('[' + newArr + ']');
<script src="http://code.jquery.com/jquery.min.js"></script>
<b>Original Array : </b>
<div id="div1"></div>
<br/>
<b>After slice(0, -1): </b>
<div id="div2"></div>
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