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Exit a Script On Error
I'm building a Shell Script that has a if function like this one:
5 Answers
5
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Why is unsigned integer overflow defined behavior but signed integer overflow isn't?
...U.
In practice, it is only the representations for signed values that may differ according to the implementation: one's complement, two's complement, sign-magnitude. For an unsigned type there is no reason for the standard to allow variation because there is only one obvious binary representation (t...
How do I check if file exists in Makefile so I can delete it?
In the clean section of my Makefile I am trying to check if the file exists before deleting permanently. I use this code but I receive errors.
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How do I close an open port from the terminal on the Mac?
...w do i close this port after I am done? and also which command can show me if port open or closed?
12 Answers
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Find text string using jQuery?
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does this work for json? What if I want to filter some text in a json value?
– Chamilyan
Sep 25 '10 at 0:10
5
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Get top 1 row of each group
... DESC) AS rn
FROM DocumentStatusLogs
)
SELECT *
FROM cte
WHERE rn = 1
If you expect 2 entries per day, then this will arbitrarily pick one. To get both entries for a day, use DENSE_RANK instead
As for normalised or not, it depends if you want to:
maintain status in 2 places
preserve status h...
val-mutable versus var-immutable in Scala
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You should strive for referential transparency. What that means is that, if I have an expression "e", I could make a val x = e, and replace e with x. This is the property that mutability break. Whenever you need to make a design decision, maximize for referential transparency.
As a practical matt...
Retrieve filename from file descriptor in C
...ll give you the name of the file as it was when it was opened — however, if the file was moved or deleted since then, it may no longer be accurate (although Linux can track renames in some cases). To verify, stat the filename given and fstat the fd you have, and make sure st_dev and st_ino are the...
Is there a better way to run a command N times in bash?
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If you have LOTS of iterations, the form with for (n=0;n<k;n++)) may be better; I suspect {1..k} will materialize a string with all those integers separated by spaces.
– Joe Koberg
Se...
How can I handle the warning of file_get_contents() function in PHP?
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Step 1: check the return code: if($content === FALSE) { // handle error here... }
Step 2: suppress the warning by putting an error control operator (i.e. @) in front of the call to file_get_contents():
$content = @file_get_contents($site);
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