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Check if character is number?
I need to check whether justPrices[i].substr(commapos+2,1) .
22 Answers
22
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PostgreSQL error: Fatal: role “username” does not exist
...m user of the same name (h9uest in your case):
sudo -u postgres -i
As recommended here or here.
Then try again. Type exit when done with operating as system user postgres.
Or execute the single command createuser as postgres with sudo, like demonstrated by drees in another answer.
The point is...
How to print the ld(linker) search path
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You can do this by executing the following command:
ld --verbose | grep SEARCH_DIR | tr -s ' ;' \\012
gcc passes a few extra -L paths to the linker, which you can list with the following command:
gcc -print-search-dirs | sed '/^lib/b 1;d;:1;s,/[^/.][^/]*/\.\./,/,;...
node.js hash string?
... in a classic while-loop, then be sure that it's done... ➝ stackoverflow.com/a/21219407/444255
– Frank Nocke
Feb 15 '16 at 16:19
9
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What is in your .vimrc? [closed]
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You asked for it :-)
"{{{Auto Commands
" Automatically cd into the directory that the file is in
autocmd BufEnter * execute "chdir ".escape(expand("%:p:h"), ' ')
" Remove any trailing whitespace that is in the file
autocmd BufRead,BufWrite * if ! &b...
Unicode Processing in C++
...standards, the current C++11 standard has built in Unicode support: http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2011/n3242.pdf
So the truly best practice for Unicode processing in C++ would be to use the built in facilities for it. That isn't always a possibility with older code bases though...
Why is NaN not equal to NaN? [duplicate]
...ted answer, I disagree with it. NaN does not mean "undefined" - see http://www.cs.berkeley.edu/~wkahan/ieee754status/IEEE754.PDF, page 7 (search for the word "undefined"). As that document confirms, NaN is a well-defined concept.
Furthermore, IEEE approach was to follow the regular mathematics rule...
How do you serialize a model instance in Django?
...nd of your last line, like @DavorLucic suggested? And no need for trailing comma in your list literal (for the love of PEP8 ;).
– hobs
Oct 29 '14 at 18:16
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Remove all the elements that occur in one list from another
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Python has a language feature called List Comprehensions that is perfectly suited to making this sort of thing extremely easy. The following statement does exactly what you want and stores the result in l3:
l3 = [x for x in l1 if x not in l2]
l3 will contain [1, 6...
MySQL Like multiple values
...l.com/read.php?10,392332,392950#msg-392950
More about REGEXP here: http://www.tutorialspoint.com/mysql/mysql-regexps.htm
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