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How to match, but not capture, part of a regex?
...ut this regular expression matches only apple or banana if it’s preceded by 123- and followed by -456, or it matches the empty string if it’s preceded by 123- and followed by 456.
|Lookaround | Name | What it Does |
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How to avoid warning when introducing NAs by coercion
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Although this is the preferred response, the answer by jangorecki below seems, to me, more solid.
– Ian
Jul 6 at 15:29
add a comment
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Oracle Differences between NVL and Coalesce
... LENGTH(RAWTOHEX(SYS_GUID()))) AS val
FROM dual
CONNECT BY
level <= 10000
)
This runs for almost 0.5 seconds, since it generates SYS_GUID()'s, despite 1 being not a NULL.
SELECT SUM(val)
FROM (
SELECT COALESCE(1, LENGTH(RAWTOHEX(SYS_GUID(...
Unexpected value from nativeGetEnabledTags: 0
...round I'm filtering the LogCat output with the following expression on the by Log Message field of the filter:
^(?!.*(nativeGetEnabledTags)).*$
Otherwise it is so spammed it's almost useless.
Following Laksh suggestion, if you want to filter this always without having to always write it on th...
What techniques can be used to speed up C++ compilation times?
...standard headers don't have a respective declarations header.
Prefer pass-by-reference to pass-by-value in function signatures. This will eliminate the need to #include the respective type definitions in the header file and you will only need to forward-declare the type. Of course, prefer const ref...
How should I read a file line-by-line in Python?
...e.txt') as fp:
for line in fp:
print line
We are all spoiled by CPython's relatively deterministic reference-counting scheme for garbage collection. Other, hypothetical implementations of Python will not necessarily close the file "quickly enough" without the with block if they use so...
What is the use of “ref” for reference-type variables in C#?
...C#. It details clearly the exact behaviour and usage of passing parameters by value, by reference (ref), and by output (out).
Here's an important quote from that page in relation to ref parameters:
Reference parameters don't pass the
values of the variables used in the
function member invoc...
brew update: The following untracked working tree files would be overwritten by merge:
...po, you have to update or reset brew to the master branch version. brew [by default] is located in the /usr/local folder, so you
Go to that folder [first command] which also should update permissions (if not see below)
Fetch the origin [second command] which means to update your LOCAL version ...
Why can't you modify the data returned by a Mongoose Query (ex: findById)
When I try to change any part of the data returned by a Mongoose Query it has no effect.
2 Answers
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How to set a Fragment tag by code?
...Fragment class. The only way to set a Fragment tag that I have found is by doing a FragmentTransaction and passing a tag name as parameter.
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