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Regular Expression for alphanumeric and underscores
...e to have a regular expression that checks if a string contains only upper and lowercase letters, numbers, and underscores.
...
How to use multiple arguments for awk with a shebang (i.e. #!)?
...sr/bin/gawk" "--re-interval" "-f" "$0" "$@", but awk treated that as a command and printed out every line of input unconditionally. That is why I put in the arbitrary_long_name==0 - it's supposed to fail all the time. You could replace it with some gibberish string. Basically, I was looking for a fa...
What's the best way to check if a file exists in C?
...exists
} else {
// file doesn't exist
}
You can also use R_OK, W_OK, and X_OK in place of F_OK to check for read permission, write permission, and execute permission (respectively) rather than existence, and you can OR any of them together (i.e. check for both read and write permission using R...
I need this baby in a month - send me nine women!
...duals to be added to the project must have:
At least a reasonable understanding of the problem domain of the project
Be proficient in the language of the project and the specific technologies that they would use for the tasks they would be given
Their proficiency must /not/ be much less or much gr...
Any recommendations for a CSS minifier? [closed]
...
The YUI Compressor is fantastic. It works on JavaScript and CSS. Check it out.
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Can you “compile” PHP code and upload a binary-ish file, which will just be run by the byte code int
I know that PHP is compiled to byte code before it is run on the server, and then that byte code can be cached so that the whole script doesn't have to be re-interpreted with every web access.
...
What are carriage return, linefeed, and form feed?
...when the name was coined. This is commonly escaped as \r, abbreviated CR, and has ASCII value 13 or 0x0D.
Linefeed means to advance downward to the next line; however, it has been repurposed and renamed. Used as "newline", it terminates lines (commonly confused with separating lines). This is co...
What is difference between MVC, MVP & MVVM design pattern in terms of coding c#
...ser which can be the UI
Controller: Controls the interaction between Model and View, where view calls the controller to update model. View can call multiple controllers if needed.
MVP:
Similar to traditional MVC but Controller is replaced by Presenter. But the Presenter, unlike Controller is re...
Is < faster than
...n two machine instructions:
A test or cmp instruction, which sets EFLAGS
And a Jcc (jump) instruction, depending on the comparison type (and code layout):
jne - Jump if not equal --> ZF = 0
jz - Jump if zero (equal) --> ZF = 1
jg - Jump if greater --> ZF = 0 and SF = OF
(etc...)
Exa...
Which is the fastest algorithm to find prime numbers?
...ly I don't think primegen is the fastest, or even the second-fastest; yafu and primesieve are both faster in general, I think, and certainly over 2^32. Both are (modified) sieves of Eratosthenes rather than the Atkin-Bernstein sieve.
– Charles
Aug 19 '11 at 4:...