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Syntax of for-loop in SQL Server
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JOINs (and set operations) should be preferred over looping constructs in SQL.
– Oded
May 20 '11 at 7:58
6
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Why is there no Tree class in .NET?
... the choice of whether to use a tree is typically an implementation detail and is otherwise an unconventional way to access data. That is, you don't say, "binary-search-for element #37"; instead, you say, "get me element #37".
But have you taken a look at C5? It's super-handy and they have several ...
Validate phone number with JavaScript
I found this code in some website, and it works perfectly. It validates that the phone number is in one of these formats:
(123) 456-7890 or 123-456-7890
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Where/How to getIntent().getExtras() in an Android Fragment? [duplicate]
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What I tend to do, and I believe this is what Google intended for developers to do too, is to still get the extras from an Intent in an Activity and then pass any extra data to fragments by instantiating them with arguments.
There's actually a...
Block comments in html.erb templates in rails
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The =begin approach is annoying because:
It doesn't work for mixed HTML and Ruby (or just HTML) that's on a single line
It's annoying to type
The <% if false %> approach works, but it looks weird and doesn't give anyone else who looks at your code a hint about your intentions.
My solutio...
How do I check if a file exists in Java?
The only similar question on SO deals with writing the file and was thus answered using FileWriter which is obviously not applicable here.
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How to convert a string to utf-8 in Python
...icode'>)
^ This is the difference between a byte string (plain_string) and a unicode string.
>>> s = "Hello!"
>>> u = unicode(s, "utf-8")
^ Converting to unicode and specifying the encoding.
In Python 3
All strings are unicode. The unicode function does not exist anymore. See ...
Kill a postgresql session/connection
... pg_backend_pid()
-- don't kill the connections to other databases
AND datname = 'database_name'
;
Before executing this query, you have to REVOKE the CONNECT privileges to avoid new connections:
REVOKE CONNECT ON DATABASE dbname FROM PUBLIC, username;
If you're using Postgres 8....
Using Git how do I find changes between local and remote
... commits from your remote servers.
So, if you have a branch called master and a remote called origin, after running git fetch, you should also have a branch called origin/master. You can then get the git log of all commits that master needs to be a superset of origin/master by doing git log master....
not:first-child selector
...ther technique:
Define a rule that has greater scope than what you intend and then "revoke" it conditionally, limiting its scope to what you do intend:
div ul {
background-color: #900; /* applies to every ul */
}
div ul:first-child {
background-color: transparent; /* limits the scope of ...