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What is the difference between . (dot) and $ (dollar sign)?
...fore cannot be used with the . operator.
show can take an Int and return a String.
putStrLn can take a String and return an IO ().
You can chain show to putStrLn like this:
(putStrLn . show) (1 + 1)
If that's too many parentheses for your liking, get rid of them with the $ operator:
putStrLn ....
MySQL Error 1215: Cannot add foreign key constraint
... @www.jensolsson.se You are correct, if the PK includes one or more string columns then they must use the same character set and collation. In this specific case the PK was an INT so the character set of the table and/or columns was not relevant.
– Ike Walker
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How to write file if parent folder doesn't exist?
...t the easiest way to do this is to use the outputFile() method from the fs-extra module.
Almost the same as writeFile (i.e. it overwrites), except that if the parent directory does not exist, it's created. options are what you'd pass to fs.writeFile().
Example:
var fs = require('fs-extra');
v...
Decimal number regular expression, where digit after decimal is optional
...
@Chandranshu and it matches an empty string, which your change would also solve.
– OGHaza
Nov 22 '13 at 14:29
2
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Passing variables through handlebars partial
...l = Handlebars.compile(source)(options.hash);
return new Handlebars.SafeString(html);
});
The key thing here is that Handlebars helpers accept a Ruby-like hash of arguments. In the helper code they come as part of the function’s last argument—options— in its hash member. This way you can ...
What's the difference between ASCII and Unicode?
...t their language (to support "é", in French, for example). Just using one extra bit doubled the size of the original ASCII table to map up to 256 characters (2^8 = 256 characters). And not 2^7 as before (128).
10000010 -> é (e with acute accent - 130)
10100000 -> á (a with acute accent - 16...
Add custom headers to WebView resource requests - android
...ws for adding headers to resource requests - onLoadResource(WebView view, String url) . Any help would be wonderful.
11 ...
How to append a newline to StringBuilder
I have a StringBuilder object,
9 Answers
9
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Python argparse ignore unrecognised arguments
...r "recognized" arguments instead.
parser = argparse.ArgumentParser(prefix_chars='+')
parser.add_argument('+cd')
The same command will produce
Namespace(_unrecognized_args=['--foo', 'BAR', 'a', 'b'], cd='e')
Put that in your pipe and smoke it =)
nJoy!
...
Convert a byte array to integer in Java and vice versa
...andatory indeed. byte b = 0; b |= 0x88; System.out.println(Integer.toString(b, 16)); //Output: -78 System.out.println(Integer.toString(b & 0xFF, 16)); //Output: 88
– HBN
Dec 6 '14 at 17:54
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