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Query a parameter (postgresql.conf setting) like “max_connections”
Does anyone know if it's even possible (and how, if yes) to query a database server setting in PostgreSQL (9.1)?
1 Answer
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setup cron tab to specific time of during weekdays
...server. We want the cron job to run the script at certain times of the day and on some specific days of the week. For example, we want to setup a cron job that runs the script with the following sequence:
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Deleting all pending tasks in celery / rabbitmq
...ango, for celery 3.0+: manage.py celery purge (celeryctl is now deprecated and will be gone in 3.1).
– Henrik Heimbuerger
Apr 19 '13 at 14:26
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How do I check two or more conditions in one ?
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If you are using JSP 2.0 and above It will come with the EL support:
so that you can write in plain english and use and with empty operators to write your test:
<c:if test="${(empty object_1.attribute_A) and (empty object_2.attribute_B)}">
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How to check an Android device is HDPI screen or MDPI screen?
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Density values described at: developer.android.com/guide/practices/screens_support.html
– esilver
Jan 21 '14 at 21:52
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Formatting a float to 2 decimal places
...("n2"); // 2dp Number
myFloatVariable.ToString("c2"); // 2dp currency
Standard Number Format Strings
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Link and execute external JavaScript file hosted on GitHub
... for this, now, by using jsdelivr.net.
Steps:
Find your link on GitHub, and click to the "Raw" version.
Copy the URL.
Change raw.githubusercontent.com to cdn.jsdelivr.net
Insert /gh/ before your username.
Remove the branch name.
(Optional) Insert the version you want to link to, as @version (if y...
Where does Xcode 4 store Scheme Data?
I'm just starting to use Xcode 4, and I'm trying to find the file in a project where it stores all of a project's Schemes. I figured they would be stored in a file in the xcodeproj directory somewhere, but for the life of me I can't find which one.
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Difference between window.location.assign() and window.location.replace()
What is the difference between window.location.assign() and window.location.replace() , when both redirect to a new page?
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Disable cache for some images
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A common and simple solution to this problem that feels like a hack but is fairly portable is to add a randomly generated query string to each request for the dynamic image.
So, for example -
<img src="image.png" />
Would be...