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Fastest check if row exists in PostgreSQL
...ex on contact, it can usually reduce time cost to 1 ms.
CREATE INDEX index_contact on contact(id);
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Relative URL to a different port number in a hyperlink?
... ASP, something like ...
<a href="<%=Request.ServerVariables("SERVER_NAME")%>:8080">Look at the other port</a>
should work. However, the exact format will depend on the technology you are using.
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Setting Curl's Timeout in PHP
...cumentation: http://www.php.net/manual/en/function.curl-setopt.php
CURLOPT_CONNECTTIMEOUT - The number of seconds to wait while trying to connect. Use 0 to wait indefinitely.
CURLOPT_TIMEOUT - The maximum number of seconds to allow cURL functions to execute.
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT...
Apply style ONLY on IE
...mp; JS hacks beyond IE.
/***** Attribute Hacks ******/
/* IE6 */
#once { _color: blue }
/* IE6, IE7 */
#doce { *color: blue; /* or #color: blue */ }
/* Everything but IE6 */
#diecisiete { color/**/: blue }
/* IE6, IE7, IE8, but also IE9 in some cases :( */
#diecinueve { color: blue\9; }
/* IE7...
Age from birthdate in python
...t(True) is 1 and int(False) is 0:
from datetime import date
def calculate_age(born):
today = date.today()
return today.year - born.year - ((today.month, today.day) < (born.month, born.day))
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How to validate a url in Python? (Malformed or not)
...om django.core.exceptions import ValidationError
val = URLValidator(verify_exists=False)
try:
val('http://www.google.com')
except ValidationError, e:
print e
If you set verify_exists to True, it will actually verify that the URL exists, otherwise it will just check if it's formed correctl...
What's the difference between RANK() and DENSE_RANK() functions in oracle?
What's the difference between RANK() and DENSE_RANK() functions? How to find out nth salary in the following emptbl table?
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YouTube Video Embedded via iframe Ignoring z-index?
...o player" width="480" height="390" src="http://www.youtube.com/embed/lzQgAR_J1PI?wmode=transparent" frameborder="0" wmode="Opaque">
or this
//Fix z-index youtube video embedding
$(document).ready(function (){
$('iframe').each(function(){
var url = $(this).attr("src");
$(thi...
UITapGestureRecognizer breaks UITableView didSelectRowAtIndexPath
... This is the cleanest in Swift. Thanks
– Dx_
Aug 8 '16 at 6:00
works well within cells in tableview, lovely ...
Is there any way to git checkout previous branch?
...
@Erotemic in powershell it would be git reflog | ? { $_ -match ': checkout: moving from (.*) to (.*)'} | % { $Matches[1] } . In bash you have to write something equivalent (get reflog and filter it to lines containing ": checkout:" string and then extract branch name). This is a...