Synopsis

(( ))

Description

This command evaluates the arithmetic expression .

If the expression evaluates to 0 then the exit code of the expression is set to 1 (FALSE). If the expression evaluates to something else than 0, then the exit code of the expression is set to 0 (TRUE). For this return code mapping, please see this section.

Synopsis

(( ))

Description

This command evaluates the arithmetic expression .

If the expression evaluates to 0 then the exit code of the expression is set to 1 (FALSE). If the expression evaluates to something else than 0, then the exit code of the expression is set to 0 (TRUE). For this return code mapping, please see this section.

I am wondering which is the preffered way of programming in C, if one is using the same math expressions very often
1. Use the math function/expression each time
2. Precalculate the expression and store it to a variable and use the variable instead

My questions are:
1. Will there be any difference in the execution time?
2.

I'm looking for a regular expression that I can use to scan for HTTP errors in my standardapache log files.

I'm interesting in matching all lines that don't have an HTTP 200 or HTTP 204 return status.

I can match the lines that do contain either HTTP 204 or HTTP 200 return code

grep 'HTTP[^"]*" 204 \| HTTP[^"]*" 200'

But I would like to have the inverse.

What is the correct way to multithread independent if statements in a bash script? Is it best to place the & after code contained in the if or after the expression?

For an & after the expression, it makes sense to continue threading as necessary if the if contains a large block of code.

Hi,
how to look for an expression like :

Code:
[09/06/12 00:03:44]
or

Code:

Client ChkAeStatus4 service
in VI ?

For a word , of cours :

Code:

/word
But for an expression ?
Thank you.

Use algebraic manipulation to find the minimum product of-sums expression for the function:(A + C + D) (A + B! + C)(A + B! + C! + D)

What am I doing wrong??

Here is what I have so far...

1) I need each expression to have all of the terms.
2) so I said okay the first term is missing a B, and the second term is missing a D so I did...

(A + B + C + D)(A + B! + C + D!)(A + B! + C + D)(A + B!

Hi all,
Accounting to gnu/sed manual,
http://www.gnu.org/software/sed/manu...ar-Expressions
*
Matches a sequence of zero or more instances of matches for the preceding regular expression, which must be an ordinary character, a special character preceded by \, a ., a grouped regexp (see below), or a bracket expression.

i need to to use c++ find_if() lambda expression, in my vc compiler it compiles without any errors, and i can't compile it in linux:debian:g++4.4 :

-CPP function:

istream_iterator<string> it = find_if(istream_iterator<string>(ss),
f,
[=](const string& str)
{return str == to_string(urlHash);});

-Error output:

-error: expected primary-expression