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Favorite Django Tips & Features?

... This alleviates you from always type os.path.join() which gets annoying pretty fast: j = lambda filename: os.path.join(PROJECT_DIR, filename). Then you just need to type j("static"). – wr. Ma...
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What is the difference between HTTP_HOST and SERVER_NAME in PHP?

...T is obtained from the HTTP request header and this is what the client actually used as "target host" of the request. The SERVER_NAME is defined in server config. Which one to use depends on what you need it for. You should now however realize that the one is a client-controlled value which may thus...
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How to filter a dictionary according to an arbitrary condition function?

... And here is a good explanation why the function call dict() is slower than the constructor/literal syntax {} doughellmann.com/2012/11/… – dorvak Jul 10 '13 at 9:37 ...
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Merge two Git repositories without breaking file history

...ose instructions mostly works, except that when I commit the subtree merge all of the files from the old repositories are recorded as new added files. I can see the commit history from the old repositories when I do git log , but if I do git log <file> it shows only one commit for that fil...
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What is the bit size of long on 64-bit Windows?

...pointers for 64-bit platforms. The two mostly widely used were ILP64 (actually, only a very few examples of this; Cray was one such) and LP64 (for almost everything else). The acronynms come from 'int, long, pointers are 64-bit' and 'long, pointers are 64-bit'. Type ILP64 LP64 LLP64...
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How do I bind a WPF DataGrid to a variable number of columns?

... property is ReadOnly, like everyone noticed, I made an Attached Property called BindableColumns which updates the Columns in the DataGrid everytime the collection changes through the CollectionChanged event. If we have this Collection of DataGridColumn's public ObservableCollection<DataGrid...
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Print number of keys in Redis

... key. Also Redis may actively evict some expired keys, but not necessarily all of them. – seppo0010 Aug 24 '15 at 22:23 add a comment  |  ...
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Unable to install Maven on Windows: “JAVA_HOME is set to an invalid directory”

...ollowed the Maven tutorial to the letter but I still can't get Maven installed on Windows. 16 Answers ...
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iReport not starting using JRE 8

I have downloaded and installed the iReport 4.5 using te Windows installer. But when I try to start the iReport it shows the splash screen but does not start. ...
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Gradients in Internet Explorer 9

...soft.com/testdrive/Graphics/CSSGradientBackgroundMaker/Default.html Note: all of these browsers also support rgb/rgba in place of hexadecimal notation. share | improve this answer | ...