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Find document with array that contains a specific value
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32
In case you need to find documents which contain NULL elements inside an array of sub-documents...
Trimming a huge (3.5 GB) csv file to read into R
...with readLines. This piece of a code creates csv with selected years.
file_in <- file("in.csv","r")
file_out <- file("out.csv","a")
x <- readLines(file_in, n=1)
writeLines(x, file_out) # copy headers
B <- 300000 # depends how large is one pack
while(length(x)) {
ind <- grep("^[^...
DateTime “null” value
I've been searching a lot but couldn't find a solution. How do you deal with a DateTime that should be able to contain an uninitialized value (equivalent to null)? I have a class which might have a DateTime property value set or not. I was thinking of initializing the property holder to DateTime.Min...
How to get body of a POST in php?
...dy of a POST or PUT request (or any other HTTP method):
$entityBody = file_get_contents('php://input');
Also, the STDIN constant is an already-open stream to php://input, so you can alternatively do:
$entityBody = stream_get_contents(STDIN);
From the PHP manual entry on I/O streamsdocs:
ph...
What is a pre-revprop-change hook in SVN, and how do I create it?
...icely.
– Mark Biek
Aug 10 '10 at 18:32
27
You can edit hooks in VisualSVN by right-clicking your ...
URLs: Dash vs. Underscore [closed]
Should it be /about_us or /about-us ?
18 Answers
18
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.gitignore all the .DS_Store files in every folder and subfolder
I've added .DS_Store to the .gitignore file, but it seems that it is only ignoring .DS_Store in the root directory, not in every folder and subfolder.
...
How to check if a symlink exists
... otherwise.
– bear
Apr 23 '11 at 21:32
48
To help anyone who finds this via Google as I did, the ...
How to stretch div height to fill parent div - CSS
I have a page with divs like below
8 Answers
8
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MySQL “NOT IN” query
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answered Feb 11 '15 at 10:32
user4554358user4554358
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