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Extract substring using regexp in plain bash
I'm trying to extract the time from a string using bash, and I'm having a hard time figuring it out.
4 Answers
...
using jquery $.ajax to call a PHP function
...oth .end() and .data return data to variables
var strLenA = P.strlen('some string').end();
var strLenB = P.strlen('another string').end();
var totalStrLen = strLenA + strLenB;
console.log( totalStrLen ); // 25
// .data Returns data in an array
var data1 = P.crypt("Some Crypt String").data();
consol...
Disable assertions in Python
...
$ python -c "assert False"
Traceback (most recent call last):
File "<string>", line 1, in <module>
AssertionError
Note that by disable I mean it also does not execute the expression that follows it:
$ python -Oc "assert 1/0"
$ python -c "assert 1/0"
Traceback (most recent call las...
How to sort a Ruby Hash by number value?
... am running into is that the default Hash.sort function sorts numbers like strings rather than by number size.
4 Answers
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Behaviour of increment and decrement operators in Python
...t I presume that you wouldn't expect a hypothetical ++ operator to work on strings.)
++count
Parses as
+(+count)
Which translates to
count
You have to use the slightly longer += operator to do what you want to do:
count += 1
I suspect the ++ and -- operators were left out for consistency...
Redirect to an external URL from controller action in Spring MVC
...
Its even simpler if you directly return a String rather then the ModelAndView.
– daniel.eichten
Sep 5 '15 at 8:57
24
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How to set warning level in CMake?
...orce to always compile with W4
if(CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
string(REGEX REPLACE "/W[0-4]" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
else()
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
endif()
elseif(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX)
# Update if necessa...
Grep regex NOT containing string
...%2f%2fstackoverflow.com%2fquestions%2f10411616%2fgrep-regex-not-containing-string%23new-answer', 'question_page');
}
);
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...
Algorithm to compare two images
...can be used as a search object. There are probably several ways you could extract properties/data from this region of interest and use them to search your data set.
If you have more than 2 regions of interest, you can measure the distances between them. Take this simplified example:
(source: pe...
Why “decimal” is not a valid attribute parameter type?
...
OK so why are strings allowed as attribute properties? I suppose it comes under the 'array of primitives' category but it is heap allocated (reference type)...
– Steztric
Nov 11 '16 at 8:29
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