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How do I drop a foreign key constraint only if it exists in sql server?
... TABLE t
DROP CONSTRAINT IF EXISTS tpartnt
GO
DROP TABLE IF EXISTS t
See http://blogs.msdn.com/b/sqlserverstorageengine/archive/2015/11/03/drop-if-exists-new-thing-in-sql-server-2016.aspx
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Scroll to a div using jquery
...croll upto Div with jQuery.
</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<script>
$(document).ready(function () {
$("#button1").click(function () {
var...
Determining the last changelist synced to in Perforce
...
I recommend the opposite for automatic build systems: you should first get the latest changelist from the server using:
p4 changes -s submitted -m1
then sync to that change and record it in the revision info. The reason is as...
Querying DynamoDB by date
...---------
Date value of CreatedAt | CreatedAt
Limitation imposed on the HTTP API user to specify the number of days to retrieve data, defaulted to 24 hr.
This way, I can always specify the HashKey as Current date's day and RangeKey can use > and < operators while retrieving. This way the d...
how to remove untracked files in Git?
...e this if you don't want to remove ignored files)
Use with Caution!
These commands can permanently delete arbitrary files, that you havn't thought of at first. Please double check and read all the comments below this answer and the --help section, etc., so to know all details to fine-tune your comm...
Why does Ruby 1.9.2 remove “.” from LOAD_PATH, and what's the alternative?
... has long been considered a bad thing in the Unix world (see, for example, http://www.faqs.org/faqs/unix-faq/faq/part2/section-13.html). I assume the Ruby folks have been persuaded of the wisdom of not doing that.
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How do I determine the size of an object in Python?
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Illegal string offset Warning PHP
...; // causes illegal string offset error
You can see this in action here:
http://ideone.com/fMhmkR
For those who come to this question trying to translate the vagueness of the error into something to do about it, as I was.
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How to create a new object instance from a Type
...rameters to the constructor and such. Check out the documentation at:
http://msdn.microsoft.com/en-us/library/system.activator.createinstance.aspx
or (new path)
https://docs.microsoft.com/en-us/dotnet/api/system.activator.createinstance
Here are some simple examples:
ObjectType instanc...
Is optimisation level -O3 dangerous in g++?
... heard from various sources (though mostly from a colleague of mine), that compiling with an optimisation level of -O3 in g++ is somehow 'dangerous', and should be avoided in general unless proven to be necessary.
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