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How to search a specific value in all tables (PostgreSQL)?
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ERROR: syntax error at or near "default" LINE 3: haystack_tables name[] default '{}' (Using PostgreSQL 8.2.17 and cannot upgrade)
– Henno
May 11 '14 at 8:54
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Why doesn't print work in a lambda?
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edited Jun 5 '16 at 23:05
Whymarrh
11.1k1313 gold badges5454 silver badges9494 bronze badges
answered...
Graph Algorithm To Find All Connections Between Two Arbitrary Vertices
... have deep graph (A->B->C->...->N) you could have StackOverflowError in java.
– Rrr
Aug 15 '12 at 20:23
1
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While loop to test if a file exists in bash
...some time.
PS This also causes an annoying number of "Stale file handler" errors.
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How to make “if not true condition”?
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I think it can be simplified into:
grep sysa /etc/passwd || {
echo "ERROR - The user sysa could not be looked up"
exit 2
}
or in a single command line
$ grep sysa /etc/passwd || { echo "ERROR - The user sysa could not be looked up"; exit 2; }
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How to know what the 'errno' means?
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You can use strerror() to get a human-readable string for the error number. This is the same string printed by perror() but it's useful if you're formatting the error message for something other than standard error output.
For example:
#i...
JavaScript isset() equivalent
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the problem with this is that you get an error when you try to check deeper properties, for example: obj.thisdoesntexist.foo !== undefined. In PHP you can use isset or empty and safely at any deep.
– Enrique
Aug 21 '11 at 16:35...
Tar archiving that takes input from a list of files
...e this: tar -cvf allfiles.tar --exclude='^#' -T mylist.txt. Tar reports an error, but when you check your tar archive, there are no errors, and all files from the list are inside your archive.
– Matt G
Oct 31 '18 at 6:05
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Convert pem key to ssh-rsa format
...key_file_name ssh_key_description\n", argv[0]);
iRet = 1;
goto error;
}
pFile = fopen(argv[1], "rt");
if (!pFile)
{
printf("Failed to open the given file\n");
iRet = 2;
goto error;
}
pPubKey = PEM_read_PUBKEY(pFile, NULL, NULL, NULL);
if (!pPubKey...
How to remove convexity defects in a Sudoku square?
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I am getting error: output[ri*50:(ri+1)*50-1 , ci*50:(ci+1)*50-1] = warp[ri*50:(ri+1)*50-1 , ci*50:(ci+1)*50-1].copy TypeError: long() argument must be a string or a number, not 'builtin_function_or_method'
– use...