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Computed / calculated / virtual / derived columns in PostgreSQL
...al, but makes makes life a bit easier).
Suppose my computation is md5(some_string_field), then I create the index as:
CREATE INDEX some_string_field_md5_index ON some_table(MD5(some_string_field));
Now, any queries that act on MD5(some_string_field) will use the index rather than computing it f...
leading zeros in rails
...using a given padding character.
str.rjust(integer, padstr=' ') → new_str
If integer is greater than the length of str, returns a new String of length integer with str right justified and padded with padstr; otherwise, returns str.
some_int = 5
some_int.to_s.rjust(2, '0') # => '05'
...
CSS Font Border?
...
Here's what I'm using :
.text_with_1px_border
{
text-shadow:
-1px -1px 0px #000,
0px -1px 0px #000,
1px -1px 0px #000,
-1px 0px 0px #000,
1px 0px 0px #000,
-1px 1px 0px #000,
0px 1px 0p...
Bootstrap with jQuery Validation Plugin
...After(element);
}
}
});
See Example: http://jsfiddle.net/mapb_1990/hTPY7/7/
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Escape angle brackets in a Windows command prompt
... echo to do the output and quote with double quotes:
C:\WINDOWS> set/p _="<html>" <nul
<html>
C:\WINDOWS> set/p _="<html>" <nul | sort
<html>
Note that this will not preserve leading spaces on the prompt text.
...
How to programmatically take a screenshot on Android?
... save the file:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
And this is the code (running in an Activity):
private void takeScreenshot() {
Date now = new Date();
android.text.format.DateFormat.format("yyyy-MM-dd_hh:mm:ss", now);
try {
//...
Android Writing Logs to text File
...
Don't forget to add permission for writing_external_storage in Manifest!
– virusss8
Jan 18 '12 at 20:16
...
Xcode stuck at “Your application is being uploaded”
...rom apple download center:
http://support.apple.com/kb/DL1572?viewlocale=en_US
If this still doesn't help then follow this third method:
This method enables the application loader to use the HTTP port instead of HTTPS.
Go to
Application Loader java folder :
/Applications/Xcode.app/Contents/Applicat...
Git Blame Commit Statistics
...git-fame that might be useful.
Installation and usage:
$ gem install git_fame
$ cd /path/to/gitdir
$ git fame
Output:
Statistics based on master
Active files: 21
Active lines: 967
Total commits: 109
Note: Files matching MIME type image, binary has been ignored
+----------------+-----+-----...
Why use ICollection and not IEnumerable or List on many-many/one-many relationships?
... memory but about encapsulation. Consider: private IEnumerable<int> _integers = new List<int> { 1, 2, 3 }; uses the same memory as private List<int> _integers = new List<int> { 1, 2, 3 };
– phoog
Apr 11 '12 at 20:29
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