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What is an NP-complete in computer science?
...in NP can be quickly (ie. in polynomial time) transformed into x.
In other words:
x is in NP, and
Every problem in NP is reducible to x
So, what makes NP-Complete so interesting is that if any one of the NP-Complete problems was to be solved quickly, then all NP problems can be solved quickly.
See...
What is the difference between Class and Klass in ruby?
...
class is a keyword used to define a new class. Since it's a reserved keyword, you're not able to use it as a variable name. You can't use any of Ruby's keywords as variable names, so you won't be able to have variables named def or module ...
Recursively counting files in a Linux directory
...nd command's standard output to wc command's standard input.
wc (short for word count) counts newlines, words and bytes on its input (docs).
-l to count just newlines.
Notes:
Replace DIR_NAME with . to execute the command in the current folder.
You can also remove the -type f to include directo...
Using ConfigurationManager to load config from an arbitrary location
...t of the question is that strConfigPath is an arbitrary location. In other words, you decide what the path is, instead of relying on the framework to try to load a config file from its conventional location. I would assume Server.MapPath would give you the absolute location for any files within your...
Is there a generator version of `string.split()` in Python?
...ng s by the rest of the arguments, possibly omitting
empty parts (empty keyword argument is responsible for that).
This is a generator function.
When only one delimiter is supplied, the string is simply split by it.
empty is then True by default.
str_split('[]aaa[][]bb[c', '[]')
-> '', 'aaa...
Where does 'Hello world' come from?
...f("hello, world");
}
The first known instance of the usage
of the words "hello" and "world"
together in computer literature
occurred earlier, in Kernighan's 1972
Tutorial Introduction to the Language
B[1], with the following code:
main( ) {
extrn a, b, c;
putchar(a); putchar(b)...
What's wrong with cplusplus.com?
...
@Steve: You said "Similar" is debateable. If the word similar is debatable, then it very much tells that this word isn't the correct word and should be avoided when explaining the behavior of std::remove and list::remove, because an explanation should be clear as much as po...
Read a variable in bash with a default value
...ntion
What does the :-Richard part do? From the bash manual:
${parameter:-word}
If parameter is unset or null, the expansion of word is substituted. Otherwise, the value of parameter is substituted.
Also worth noting that...
In each of the cases below, word is subject to tilde expansion, paramete...
Find and replace strings in vim on multiple lines
...nd : between the range and the find/replace command does no harm, in other words, these commands will still work:
:'<,'>:s/<search_string>/<replace_string>/g
:.:s/<search_string>/<replace_string>/g
...
Redirect all output to file [duplicate]
... two formats for redirecting standard output and standard error: &>word and >&word Of the two forms, the first is preferred. This is semantically equivalent to >word 2>&1"
– shelleybutterfly
Jul 13 '11 at 5:36
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