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What is more efficient: Dictionary TryGetValue or ContainsKey+Item?
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you can actually look at the .net source for it now too: referencesource.microsoft.com/#mscorlib/system/collections/… you can see that all 3 of TryGetValue, ContainsKey, and this[] call the same FindEntry method and do the same amount of work, only differing in how they...
Expand a random range from 1–5 to 1–7
... sampling, e.g.:
int i;
do
{
i = 5 * (rand5() - 1) + rand5(); // i is now uniformly random between 1 and 25
} while(i > 21);
// i is now uniformly random between 1 and 21
return i % 7 + 1; // result is now uniformly random between 1 and 7
This has an expected runtime of 25/21 = 1.19 itera...
Why would one use the Publish/Subscribe pattern (in JS/jQuery)?
...ing is an Object-oriented principle in which each component of the system knows its responsibility and doesn’t care about the other components (or at least tries to not care about them as much as possible). Loose coupling is a good thing because you can easily reuse the different modules. You’re...
Where can I find “make” program for Mac OS X Lion?
... Indeed, installing new Xcode resolved my problem. Unfortunately I didn't know that after doing a Mac OS X upgrade I also have to upgrade to the latest Xcode version.
– Roman Kagan
Jul 20 '11 at 20:05
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git switch branch without discarding local changes
..... return, edit a bunch of stuff, then: oops, wanted to be on develop
So now you want these changes, which you have not yet committed to master, to be on develop.
If you don't have a develop yet, the method is trivial:
$ git checkout -b develop
This creates a new develop branch starting from ...
How can I push a local Git branch to a remote with a different name easily?
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I'd be interested to know whether there is a shorthand for the branch name I've checked out. I might just want to git push buildserver .:test_this where the . shall be the local branch name which I don't necessarily know. I could look it up, sure,...
parseInt vs unary plus, when to use which?
...er for a more complete set of cases
Well, here are a few differences I know of:
An empty string "" evaluates to a 0, while parseInt evaluates it to NaN. IMO, a blank string should be a NaN.
+'' === 0; //true
isNaN(parseInt('',10)); //true
The unary + acts more like parseFloat ...
Fragments within Fragments
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That point is now. Nested Fragments are now part of the Android API, yay! developer.android.com/about/versions/….
– Alex Lockwood
Nov 13 '12 at 20:58
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Styling multi-line conditions in 'if' statements? [closed]
...anks, it's probably a good idea to update your examples too since they are now not recommended. I was trying to figure this out myself and was confused by the discrepancy between your answer and the style guide (hence my comment). I wasn't just trying to be pedantic.
– joshca...
Unique Constraint in Entity Framework Code First
...d compliant you should absolutely be able to enforce uniqueness this way. Now whether EF allows you to properly manage the transaction lifecycle this way is another question.
– mattmc3
May 1 '11 at 0:21
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