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Map over object preserving keys
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With Underscore
Underscore provides a function _.mapObject to map the values and preserve the keys.
_.mapObject({ one: 1, two: 2, three: 3 }, function (v) { return v * 3; });
// => { one: 3, two: 6, three: 9 }
DEMO
With Lodash
Lodash provides a function _.mapVa...
How to sum up an array of integers in C#
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int sum = arr.AsParallel().Sum(); a faster version that uses multiple cores of the CPU. To avoid System.OverflowException you can use long sum = arr.AsParallel().Sum(x => (long)x); For even faster versions that avoid overflow exception and s...
When creating a service with sc.exe how to pass in context parameters?
...ce as well as setting the start setting to auto so that it starts automatically. You can do this by specifying DisplayName= yourdisplayname and start= auto in your create statement.
Here is an example:
C:\Documents and Settings\Administrator> sc create asperacentral
binPath= "C:\Program Files\...
How can I list all commits that changed a specific file?
Is there a way to list all commits that changed a specific file?
16 Answers
16
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iPhone Data Usage Tracking/Monitoring
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The thing is that pdp_ip0 is one of interfaces, all pdpXXX are WWAN interfaces dedicated to different functions, voicemail, general networking interface.
I read in Apple forum that :
The OS does not keep network statistics on a process-by-process basis. As such, there's n...
Changing the case of a string in Eclipse
... You can use the hot key CTRL+SHIFT+L to bring up the popup that contains all the available hot-keys
– Ken Chan
Oct 4 '12 at 18:57
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Getting the class name from a static method in Java
...tatic context to mean the current Class in Java, that that "class.xxx" was allowed in either instance or static code to mean this class! The problem with this is that MyClass is verbose and redundant, in the context. But then as much as I like Java it does seem to lean towards verbosity.
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What's the difference between Git Revert, Checkout and Reset?
...the history.
git reset
This command is a little more complicated. It actually does a couple of different things depending on how it is invoked. It modifies the index (the so-called "staging area"). Or it changes which commit a branch head is currently pointing at. This command may alter existing h...
When is -XAllowAmbiguousTypes appropriate?
... should be able to follow functional dependencies in order to disambiguate all the other types used in the context, namely sup and fi. And indeed, the f -> internal functional dependency in SyntacticN uses our f to disambiguate our fi, and thereafter the f -> sig sym functional dependency in A...
How to get the first element of an array?
...code. It simply shows undefined, since that's the value of a[0], which actually is the first item in the array. If you want it to show foo you should skip all undefined values but it wouldn't be the first item in the array.
– Michiel van der Blonk
Sep 6 '16 at ...