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What is the difference between String.slice and String.substring?
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Ben Nadel has written a good article about this, he points out the difference in the parameters to these functions:
String.slice( begin [, end ] )
String.substring( from [, to ] )
String.substr( start [, length ] )
He also points out that if the parameters to sli...
Placeholder in IE9
... the top $(this) should be assigned to a variable which can be used throughout the code. Calling $ for every expression that uses $(this) is a no-no straight out of "Don't Write jQuery Like This 101".
– Sami Samhuri
Nov 29 '11 at 1:10
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CSS selector by inline style attribute
... if you could tell us why you need to do this then we can probably help out more
– corroded
Dec 8 '11 at 6:19
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How to get a user's client IP address in ASP.NET?
...ge. The address for a home user on broadband will be the address at their router, so every device inside the house will appear on the outside to be the same, but the router uses NAT to ensure that traffic is routed to each device correctly. For users accessing from an office environment the address ...
What are the most common naming conventions in C?
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Additional note about point 6: the C standard has some rules about reserving names that begin with _ for implementation and future use. There are a few exceptions to names beginning with _ but in my opinion it is not worth the trouble to memor...
How to initialize an array's length in JavaScript?
...esult in confusing behavior, because all tests that use the length to find out whether an array is empty or not will report that the array is not empty.
Some tests show that setting the initial length of large arrays can be more efficient if the array is filled afterwards, but the performance gain (...
Is Zookeeper a must for Kafka?
...articular design pattern -- a single broker implementation of Kafka misses out on all of the reliability features of a multi-broker cluster along with it's ability to scale.
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Best way to test for a variable's existence in PHP; isset() is clearly broken
...e 1.
Functionality that existed only to predict how these functions are about to behave (e.g. "will there be a key 'foo' in the array returned by get_defined_vars?") is superfluous, since you can simply run the function and find out with no ill effects.
4a. Variable variables ($$foo)
While not qu...
(Built-in) way in JavaScript to check if a string is a valid number
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A very important note about parseInt is that it will allow you to specify a radix for converting the string to an int. This is a big gotcha as it tries to guess a radix for you if you don't supply it. So, for example: parseInt("17") results in 17 ...
Most efficient way to remove special characters from string
...ifference.)
Edit 3:
I tested the lookup+char[] solution, and it runs in about 13 ms.
The price to pay is, of course, the initialization of the huge lookup table and keeping it in memory. Well, it's not that much data, but it's much for such a trivial function...
private static bool[] _lookup;
st...