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Rails “validates_uniqueness_of” Case Sensitivity
...validates the uniqueness of 'foo' by asking the DB if that name exists yet and the DB says the name doesn't exist yet.
Process B does the same thing and gets the same response
Process A submits the insert statement for the new record and succeeds
If you have a database constraint requiring uniquenes...
How to change the value of attribute in appSettings section with Web.config transformation
... Excellent answer. I was trying 3rd party options like Slow Cheetah and getting nowhere - this was simple and perfect.
– Steve
Aug 14 '15 at 20:53
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How to make PyCharm always show line numbers
...g to enable line numbers for all files, but I have to always right click and enable this on per file basis.
6 Answers
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Where is virtualenvwrapper.sh after pip install?
I'm trying to setup virtualenvwrapper on OSX, and all the instructions and tutorials I've found tell me to add a source command to .profile, pointing towards virtualenvwrapper.sh. I've checked all the python and site-packages directories, and I can't find any virtualenvwrapper.sh. Is this something ...
Persistent :set syntax for a given filetype?
I'm working on a Symfony2 project which uses Twig, and the filetypes are myfile.html.twig . Vim doesn't automatically detect the syntax highlighting and so applies none. I can use :set syntax=HTML after I've opened the file but this is a pain when jumping between files.
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Should JAVA_HOME point to JDK or JRE?
...\Program Files (x86)\Java\jre7 . It works fine. Afterwards, I unzipped ant and set up the environment variables related to Ant, I got the following error messages after typing "ant -version"
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JavaScript/jQuery to download file via POST with JSON data
...ody.innerHTML += takes the HTML text of the body, appends the iframe HTML, and sets the innerHTML of the page to that string. This will wipe out any event bindings your page has, amongst other things. Create an element and use appendChild instead.
$.post('/create_binary_file.php', postData, functio...
fetch in git doesn't get all branches
...ated a new branch, which I'd like to start working on. I read the manual, and it seems dead straight easy. Strangely it's not working, and all the posts I've found suggest I'm doing the right thing. So I'll subject myself to the lambasting, because there must be something obviously wrong with t...
How to get the type of T from a member of a generic class or method?
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If I understand correctly, your list has the same type parameter as the container class itself. If this is the case, then:
Type typeParameterType = typeof(T);
If you are in the lucky situation of having object as a type parameter, see...
Twitter Bootstrap - Tabs - URL doesn't change
I'm using Twitter Bootstrap and its "tabs".
15 Answers
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