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Double not (!!) operator in PHP
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It's not the "double not operator", it's the not operator applied twice. The right ! will result in a boolean, regardless of the operand. Then the left ! will negate that boolean.
This means that for any true value (numbers...
C/C++ include header file order
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I don't think there's a recommended order, as long as it compiles! What's annoying is when some headers require other headers to be included first... That's a problem with the headers themselves, not with the order of includes.
My personal preference is to go from local to glob...
Escape Character in SQL Server
I want to use quotation with escape character. How can I do?
9 Answers
9
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Why is it slower to iterate over a small string than a small list?
I was playing around with timeit and noticed that doing a simple list comprehension over a small string took longer than doing the same operation on a list of small single character strings. Any explanation? It's almost 1.35 times as much time.
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Why am I getting this error: No mapping specified for the following EntitySet/AssociationSet - Entit
I'm using Entity Framework 4 with the Model First approach.
15 Answers
15
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How expensive is the lock statement?
I've been experimenting with multi threading and parallel processing and I needed a counter to do some basic counting and statistic analysis of the speed of the processing. To avoid problems with concurrent use of my class I've used a lock statement on a private variable in my class:
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How can I count all the lines of code in a directory recursively?
...ion and want to count all the lines of code under a specific directory and its subdirectories. We don't need to ignore comments, as we're just trying to get a rough idea.
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WordPress asking for my FTP credentials to install plugins
...ordPress blog in my local system. But when I try to add plugins from admin it asks for FTP access. What do I need to configure for WordPress to be able to upload without FTP?
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Understanding slice notation
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It's pretty simple really:
a[start:stop] # items start through stop-1
a[start:] # items start through the rest of the array
a[:stop] # items from the beginning through stop-1
a[:] # a copy of the whole ...
Stopwatch vs. using System.DateTime.Now for timing events [duplicate]
...ine the precision and resolution of the Stopwatch timing implementation.
It uses a higher resolution / precision than DateTime.Now.
You can also check out these related links:
Environment.TickCount vs DateTime.Now
Is DateTime.Now the best way to measure a function's performance?
DateTime is go...