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Func vs. Action vs. Predicate [duplicate]
...s a predicate also have an overload taking a Func<T,int,bool> for an indexed predicate.
– Jon Skeet
Nov 30 '10 at 19:17
6
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Remove blank attributes from an Object in Javascript
How do I remove all attributes which are undefined or null in a JavaScript object?
37 Answers
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How do you clear Apache Maven's cache?
... by hand (as stated by palacsint above) in the /username/.m2 directory, re-index the files by doing the following:
Go to:
Windows->Preferences->Maven->User Settings menu.
Click the Reindex button next to the Local Repository text box. Click "Apply" then "OK" and you're done.
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Given the lat/long coordinates, how can we find out the city/country?
...g/export/dump/
Add each city as a lat/long -> City mapping to a spatial index such as an R-Tree (some DBs also have the functionality)
Use nearest-neighbour search to find the closest city for any given point
Advantages:
Does not depend on an external server to be available
Very fast (easily...
What does “mro()” do?
...very attribute you get on a class's instance, not just methods, is conceptually looked up along the __mro__, so, if more than one class among the ancestors defines that name, this tells you where the attribute will be found -- in the first class in the __mro__ that defines that name.
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Conveniently map between enum and int / String
... Using the values() array will only work if all your values are 0 indexed for their id and are declared in order. (I tested this to verify that if you declare FOO(0), BAR(2), BAZ(1); that values[1] == BAR and values[2] == BAZ despite the ids passed in .)
– corsiKa
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Team city unmet requirement: MSBuildTools12.0_x86_Path exists
I have a TeamCity install on x32 Server2008 windows machine. I've run the .net 4.5 web install. I've also copied over the files from my x64 machine based on this article so that I didn't need to install vs2012 (though, I did have the change the path to remove x86 on the 32bit machine):
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How do I copy items from list to list without foreach?
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It works with all types, as long as lstStudentClass is an IEnumerable<StudentClass>, it will work. If you experience otherwise you need to provide more information.
– Lasse V. Karlsen
Apr 3 '15 ...
How to filter Pandas dataframe using 'in' and 'not in' like in SQL
...r overhead. Since this is an elementwise operation that does not depend on index alignment, there are very few situations where this method is not an appropriate replacement for pandas' isin.
Pandas routines are usually iterative when working with strings, because string operations are hard to vect...
How can I convert JSON to CSV?
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First, your JSON has nested objects, so it normally cannot be directly converted to CSV. You need to change that to something like this:
{
"pk": 22,
"model": "auth.permission",
"codename": "add_logentry",
"content_type": 8,
"name": "Can add log entry"...