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DataTrigger where value is NOT null?
I know that I can make a setter that checks to see if a value is NULL and do something. Example:
12 Answers
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How to change the commit author for one specific commit?
...dit
For example, if your commit history is A-B-C-D-E-F with F as HEAD, and you want to change the author of C and D, then you would...
Specify git rebase -i B (here is an example of what you will see after executing the git rebase -i B command)
if you need to edit A, use git rebase -i --root...
How do you compare structs for equality in C?
How do you compare two instances of structs for equality in standard C?
11 Answers
11
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When do we need curly braces around shell variables?
In shell scripts, when do we use {} when expanding variables?
7 Answers
7
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Difference between declaring variables before or in loop?
...etter, a or b?
From a performance perspective, you'd have to measure it. (And in my opinion, if you can measure a difference, the compiler isn't very good).
From a maintenance perspective, b is better. Declare and initialize variables in the same place, in the narrowest scope possible. Don't leave...
Throw an error in a MySQL trigger
...example on how to write the trigger in the link?I have two columns (idUser and idGuest) that must be mutually exclusive in the table orders, but i'm fairly new to triggers and i'm finding difficulties in writing it!Thx.
– Nicola Peluchetti
Mar 12 '11 at 14:44
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Process.start: how to get the output?
I would like to run an external command line program from my Mono/.NET app.
For example, I would like to run mencoder . Is it possible:
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CSRF Token necessary when using Stateless(= Sessionless) Authentication?
...teless apps)
http://www.jamesward.com/2013/05/13/securing-single-page-apps-and-rest-services
"The easiest way to do authentication without risking CSRF vulnerabilities is to simply avoid using cookies to identify the user"
http://sitr.us/2011/08/26/cookies-are-bad-for-you.html
"The biggest problem...
How to create composite primary key in SQL Server 2008
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What is the diference between using Primary Key and CONSTRAINT like in the example by @matthew-abbott ?
– mateuscb
Oct 6 '11 at 19:57
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SQLAlchemy: Creating vs. Reusing a Session
...on_commit=False) anytime you needed a new Session, except that its verbose and redundant, and I wanted to stop the proliferation of small-scale "helpers" that each approached the issue of this redundancy in some new and more confusing way.
So sessionmaker() is just a tool to help you create Session...