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How can I specify a branch/tag when adding a Git submodule?

...s means, when someone else checks out your repository, or pulls your code, and does git submodule update, the submodule is checked out to that particular commit. This is great for a submodule that does not change often, because then everyone on the project can have the submodule at the same commi...
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css ellipsis on second line

...ss-overflow-3/#max-lines we can haz this in pure CSS using fragments (new) and max-lines (new). Also some more info on http://css-tricks.com/line-clampin/ EDIT 2 WebKit/Blink has line-clamp: -webkit-line-clamp: 2 will put ellipsis on 2nd line. ...
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Is there a way to pass optional parameters to a function?

...a way in Python to pass optional parameters to a function while calling it and in the function definition have some code based on "only if the optional parameter is passed" ...
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How do I run all Python unit tests in a directory?

... that will, you guessed it, run all files in the aforementioned test form and return the result. I have tried two methods so far; both have failed. I will show the two methods, and I hope someone out there knows how to actually do this correctly. ...
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Python Pandas merge only certain columns

...e to only merge some columns? I have a DataFrame df1 with columns x, y, z, and df2 with columns x, a ,b, c, d, e, f, etc. 5...
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List all tables in postgresql information_schema

...asterisk).(asterisk) thing, sorry. I just ran the select query in postgres and it listed information about all the tables in it. Try running the select statement (on your blank db) and see what it returns. – RodeoClown Feb 16 '10 at 22:15 ...
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c# open a new form then close the current form?

...urrent form is disposed together with form2. Therefore you need to hide it and set form2.Closed event to call this.Close(). private void OnButton1Click(object sender, EventArgs e) { this.Hide(); var form2 = new Form2(); form2.Closed += (s, args) => this.Close(); form2.Show(); } ...
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Best practices for Storyboard login screen, handling clearing of data upon logout

...controller is a Tab Bar Controller. I'm creating the login/logout process, and it's mostly working fine, but I've got a few issues. I need to know the BEST way to set all this up. ...
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HTTP Content-Type Header and JSON

...ur own. The header is there so your app can detect what data was returned and how it should handle it. You need to look at the header, and if it's application/json then parse it as JSON. This is actually how jQuery works. If you don't tell it what to do with the result, it uses the Content-Type ...
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How do you downgrade rubygems?

...ve rubygems 1.3.1 installed but I want to go back to 1.2.0. What's the command to downgrade rubygems? 6 Answers ...