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HTML5 LocalStorage: Checking if a key exists [duplicate]
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Quoting from the specification:
The getItem(key) method must return the current value associated with the given key. If the given key does not exist in the list associated with the object then this method must return null.
You ...
Fastest way to check if a value exists in a list
...ay to do it.
You can also consider using a set, but constructing that set from your list may take more time than faster membership testing will save. The only way to be certain is to benchmark well. (this also depends on what operations you require)
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What is the best way to implement constants in Java? [closed]
...shorthand isn't worth the possible confusion as to where the constant came from, when reading long code, MaxSeconds.MAX_SECONDS may be easier to follow then going up and looking at the imports.
– MetroidFan2002
Sep 15 '08 at 20:35
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What are the lesser known but useful data structures?
...indow has focused.
Amazingly, you can derive them by applying techniques from calculus to the type of the original data structure!
share
edited Jul 23 '10 at 3:01
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Python Remove last 3 characters of a string
I'm trying to remove the last 3 characters from a string in python, I don't know what these characters are so I can't use rstrip , I also need to remove any white space and convert to upper-case
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Can we have functions inside functions in C++?
...h, that's neat! I didn't think of it. This is much better than my idea, +1 from me.
– sbi
Dec 1 '10 at 13:32
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is it possible to change values of the array when doing foreach in javascript?
...seems similar to forEach, maybe just that the possibility to return values from a map makes things clearer from a syntax perspective than using the index.
– Christophe Vidal
Nov 15 '15 at 11:56
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@selector() in Swift?
...ing Swift 3 / Xcode 8 and Swift 4 / Xcode 9):
You can construct a Selector from a Swift function type using the #selector expression.
let timer = Timer(timeInterval: 1, target: object,
selector: #selector(MyClass.test),
userInfo: nil, repeats: false)
button.addTar...
Can't get Gulp to run: cannot find module 'gulp-util'
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UPDATE
From later versions, there is no need to manually install gulp-util.
Check the new getting started page.
If you still hit this problem try reinstalling your project's local packages:
rm -rf node_modules/
npm install
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What is the use of the %n format specifier in C?
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From here we see that it stores the number of characters printed so far.
n The argument shall be a pointer to an integer into which is written the number of bytes written to the output so far by this call to one of the ...