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Count the items from a IEnumerable without iterating?
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Just adding extra some info:
The Count() extension doesn't always iterate. Consider Linq to Sql, where the count goes to the database, but instead of bringing back all the rows, it issues the Sql Count() command and returns that result ...
In PHP, what is a closure and why does it use the “use” identifier?
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ohhhhhhhh, so the Uses is used to pass in extra variables, I thought it was some funny assignment. Thanks!
– SeanDowney
Jul 1 '09 at 20:31
41
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How to count total lines changed by a specific author in a Git repository?
...y long-liner! This spot of awk swabbed everyone's deck (accurate, fast, no extra weird output). Not surprising, considering this is the sort of thing awk was designed for... Too bad you were so late to the party.
– zxq9
Oct 15 '12 at 18:41
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Bubble Sort Homework
...each turn. The heaviest is already placed last. The swapped variable is an extra check so we can mark that the list is now sorted and avoid continuing with unnecessary calculations.
def bubble(badList):
length = len(badList)
for i in range(0,length):
swapped = False
for elem...
Explain the encapsulated anonymous function syntax
... not as comprehensive as the accepted answer, it provides some very useful extra information and deserves more votes
– Avrohom Yisroel
Jul 18 '17 at 13:02
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Installing Python 3 on RHEL
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There is no extra cost. RH Software Collections are part of all RHEL developer subscriptions and most RHEL subscriptions. No-cost RHEL development subscriptions can be obtained from developers.redhat.com/download. These are real RHEL su...
Case-insensitive search in Rails model
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@botbot's comment does not apply to strings from user input. "#$$" is a little-known shortcut for escaping global variables with Ruby string interpolation. It's equivalent to "#{$$}". But string interpolation doesn't happen to user-input strings. Try these in I...
Multiple actions were found that match the request in Web Api
...tor) to match the appropriate one.
You need to differ them by either querystring or route parameter to resolve ambiguity.
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MSSQL Error 'The underlying provider failed on Open'
...ng to a database and entityClient . Now I want to change the connection string so that there will be no .mdf file.
40 ...
Prevent segue in prepareForSegue method?
...have to implement the method
- (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender
In your view controller. You do your validation there, and if it's OK then return YES; if it's not then return NO; and the prepareForSegue is not called.
Note that this method doesn't...