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Use of #pragma in C
...ler to do something, set some option, take some action, override some default, etc. that may or may not apply to all machines and operating systems.
See msdn for more info.
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Deadly CORS when http://localhost is the origin
...s: "GET, PUT, POST, DELETE, HEAD, OPTIONS"
Access-Control-Expose-Headers: <you can add values here>
The source code is published on Github.
Note that the extension filter all URLs by default. This may break some websites (for example: Dropbox). I have changed it to filter only localhost UR...
To find whether a column exists in data frame or not
...
You have a number of options, including using %in% and grepl:
dat <- data.frame(a=1:2, b=2:3, c=4:5)
dat
a b c
1 1 2 4
2 2 3 5
To get the names of the columns:
names(dat)
[1] "a" "b" "c"
Use %in% to check for membership:
"d" %in% names(dat)
[1] FALSE
Or use `grepl` to check for a...
How to build & install GLFW 3 and use it in a Linux project
...erbose output on the last three CMake stages, telling you what has been built or where it has been placed. (In /usr/include, for example.)
Step 2: Create a test program and compile
The next step is to fire up vim ("what?! vim?!" you say) or your preferred IDE / text editor... I didn't use vim, I use...
How to get subarray from array?
... and want some function getSubarray(array, fromIndex, toIndex) , that result of call getSubarray(ar, 1, 3) is new array [2, 3, 4] .
...
Regex: Remove lines containing “help”, etc
...
@AndrewSchultz, sorry, but no.
– stema
Feb 25 '19 at 13:23
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Why should the “PIMPL” idiom be used? [duplicate]
...cat_->Purr(); Purr() is not accessible from the outside because by deafult it's private. What am I missing here?
– binaryguy
Aug 14 '15 at 9:20
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Can't use method return value in write context
...hing) || !$thing. When the thing you're checking always exists (in PHP results of function calls always exist), the empty() function is nothing but a negation operator.
PHP doesn't have concept of emptyness. Values that evaluate to false are empty, values that evaluate to true are non-empty. It's t...
How to find the nearest parent of a Git branch?
...t the ancestry of baz did not change, we just removed a label (and the resulting dangling commit). And what if we add a new label at 4?
---o---1 foo
\
2---3
\
4 quux
\
5-...
Why is this program valid? I was trying to create a syntax error
...
error->Syntax(!exit(0));
Not only is it valid syntax, it doesn't result in a run-time error because the first thing executed is exit(0).
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