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Check if one IEnumerable contains all elements of another IEnumerable
What is the fastest way to determine if one IEnumerable contains all the elements of another IEnumerable when comparing a field/property of each element in both collections?
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Initialization of an ArrayList in one line
...hich has an instance initializer, and that class is created just to create one object -- that just seems like a little bit overkill to me.
What would have been nice was if the Collection Literals proposal for Project Coin was accepted (it was slated to be introduced in Java 7, but it's not likely t...
“for” vs “each” in Ruby
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With the for loop, the iterator variable still lives after the block is done. With the each loop, it doesn't, unless it was already defined as a local variable before the loop started.
Other than that, for is just syntax sugar for the each method.
When @collection is nil both loops throw an exce...
What is the best comment in source code you have ever encountered? [closed]
...e to remove anything directly offensive before releasing the code). Here's one I'm particulary fond of, placed far, far down a poorly-designed 'God Object':
/**
* For the brave souls who get this far: You are the chosen ones,
* the valiant knights of programming who toil away, without rest,
* fixin...
Is there a performance difference between i++ and ++i in C?
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So the "No" is true for the one compiler you tested with.
– Andreas
Jan 25 '11 at 8:59
174
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Fastest way to determine if an integer is between two integers (inclusive) with known sets of values
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There's an old trick to do this with only one comparison/branch. Whether it'll really improve speed may be open to question, and even if it does, it's probably too little to notice or care about, but when you're only starting with two comparisons, the chances of a hu...
Renew Provisioning Profile
Just got a notice that the provisioning profile for one of my apps is about to expire. Is there some way I can renew the existing one or must I recreate a new one?
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Entity Framework: There is already an open DataReader associated with this Command
...mand with multiple selects) while next DataReader is executed before first one has completed the reading. The only way to avoid the exception is to allow multiple nested DataReaders = turn on MultipleActiveResultSets. Another scenario when this always happens is when you iterate through result of th...
Should you declare methods using overloads or optional parameters in C# 4.0?
...them to non-optional anyway.
And I like the notion that there's generally one super method, and the rest are simpler wrappers around that one.
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What exactly is a reentrant function?
... effect.
3. What exactly is the common thread between the six points mentioned that I should keep in mind while checking my code for reentrant capabilities?
You can smell a problem if your function has/gives access to a modifiable persistent resource, or has/gives access to a function that smells....