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What is process.env.PORT in Node.js?
what is process.env.PORT || 3000 used for in Node.js? I saw this somewhere:
4 Answers
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How to pass a user defined argument in scrapy spider
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190
Spider arguments are passed in the crawl command using the -a option. For example:
scrapy crawl...
T-SQL: Opposite to string concatenation - how to split string into multiple records [duplicate]
...+ 1, CHARINDEX(@sep, @s, stop + 1)
FROM Pieces
WHERE stop > 0
)
SELECT pn,
SUBSTRING(@s, start, CASE WHEN stop > 0 THEN stop-start ELSE 512 END) AS s
FROM Pieces
)
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Ruby class types and case statements
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answered Oct 11 '10 at 17:11
NakilonNakilon
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How can I save an image with PIL?
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Abhishek kumar
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answered Jan 23 '13 at 3:42
mmgpmmgp
16.9k22 gold badges424...
How to create an empty file at the command line in Windows?
...NUL EmptyFile.txt
"How to create empty text file from a batch file?" (2008) also points to:
type NUL > EmptyFile.txt
# also
echo. 2>EmptyFile.txt
copy nul file.txt > nul # also in qid's answer below
REM. > empty.file
fsutil file createnew file.cmd 0 # to create a file on a mapped dr...
Rails :dependent => :destroy VS :dependent => :delete_all
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202
The difference is with the callback.
The :delete_all is made directly in your application and ...
Prevent “overscrolling” of web page
... still being able to scroll is:
html {
overflow: hidden;
height: 100%;
}
body {
height: 100%;
overflow: auto;
}
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Export specific rows from a PostgreSQL table as INSERT SQL script
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edited Dec 28 '18 at 10:39
Abdellah Alaoui
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an...
When to use f:viewAction / preRenderView versus PostConstruct?
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120
When should one use the f:viewAction or preRenderView event to initialize data for a page verse...