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Create a dictionary on a list with grouping
...ionary(gdc => gdc.Key, gdc => gdc.ToList());
You'd make it shorter if you used shorter variable names too, of course :)
However, might I suggest that a Lookup might be more appropriate? A Lookup is basically a dictionary from a key to an IEnumerable<T> - unless you really need the val...
What's the fastest algorithm for sorting a linked list?
I'm curious if O(n log n) is the best a linked list can do.
13 Answers
13
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How do you convert an entire directory with ffmpeg?
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If you're like me and have lots of spaces (and a few other problematic characters) in your file names, I'd suggest addding double quotes : ffmpeg -i "$i" "$name.mov";
– Pif
Dec 17 '12 at...
How to update PATH variable permanently from Windows command line?
If I execute set PATH=%PATH%;C:\\Something\\bin from the command line ( cmd.exe ) and then execute echo %PATH% I see this string added to the PATH. If I close and open the command line, that new string is not in PATH.
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onSaveInstanceState () and onRestoreInstanceState ()
...restore the values in onCreate():
public void onCreate(Bundle icicle) {
if (icicle != null){
value = icicle.getLong("param");
}
}
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Get DOS path instead of Windows path
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If you're calling this from a batch script you have to escape the % signs: for %%I in ("C:\folder with spaces") do echo %%~sI
– Igor Popov
Feb 10 '15 at 13:18
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Javascript event handler with parameters
... of closure preserve access to the variables for you.
From your comments, if what you're trying to accomplish is this:
element.addEventListener('click', func(event, this.elements[i]))
Then, you could do this with a self executing function (IIFE) that captures the arguments you want in a closure ...
How to drop columns by name in a data frame
I have a large data set and I would like to read specific columns or drop all the others.
11 Answers
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Invalid URI: The format of the URI could not be determined
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It may help to use a different constructor for Uri.
If you have the server name
string server = "http://www.myserver.com";
and have a relative Uri path to append to it, e.g.
string relativePath = "sites/files/images/picture.png"
When creat...
select and update database record with a single queryset
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Just a fair warning... if you use the update method like this then any signals attached to that model or other "code stuff" won't run against the objects. Just a pointer from someone who got burned :)
– DMac the Destroyer
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