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Mapping two integers to one, in a unique and deterministic way
... +1 That's what I think too (although I did the calculation saying the order of A and B don't matter)
– lc.
May 28 '09 at 7:50
4
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Object of custom type as dictionary key
...ride __hash__ if you want special hash-semantics, and __cmp__ or __eq__ in order to make your class usable as a key. Objects who compare equal need to have the same hash value.
Python expects __hash__ to return an integer, returning Banana() is not recommended :)
User defined classes have __hash_...
Why did Rails4 drop support for “assets” group in the Gemfile
...You can do Ajax without that. You don't need to dynamically generate JS in order to do Ajax. In fact, you shouldn't dynamically generate JS. Precompile your CoffeeScript files and avoid the issue entirely.
– Marnen Laibow-Koser
Mar 26 '14 at 21:27
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Anonymous recursive PHP functions
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In order for it to work, you need to pass $factorial as a reference
$factorial = function( $n ) use ( &$factorial ) {
if( $n == 1 ) return 1;
return $factorial( $n - 1 ) * $n;
};
print $factorial( 5 );
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JS - get image width and height from the base64 code
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I would also add that the order here is very important. If you do this the other way around (src before onload) you may miss the event. See: stackoverflow.com/a/2342181/4826740
– maxshuty
Apr 4 '17 at 17:58
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Solving a “communications link failure” with JDBC and MySQL [duplicate]
...revents any external access by default. These steps are always required in order to access MySQL from any remote machine.
– Luis Crespo
May 7 '18 at 14:26
add a comment
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Solution to INSTALL_FAILED_INSUFFICIENT_STORAGE error on Android [closed]
... root access do: # su # du /data | sort -g to get a list of folders/files ordered by size
– JuanMa Cuevas
Aug 13 '13 at 12:06
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How will I know when to create an interface?
...ing that implements IEnumerable basically says "I support iteration in a unordered foreach-type pattern", you can define complex behaviors (Count, Max, Where, Select, etc.) for any enumerable type.
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Create a CSV File for a user in PHP
... to create the CSV, but miss a basic part of the question: how to link. In order to link to download of the CSV-file, you just link to the .php-file, which in turn responds as being a .csv-file. The PHP headers do that. This enables cool stuff, like adding variables to the querystring and customize ...
Is BCrypt a good hashing algorithm to use in C#? Where can I find it? [closed]
... your chief enemy: Time.
The bcrypt algorithm works because it takes five orders of magnitude longer to hash a password than MD5; (and still much longer than AES or SHA-512). It forces the hacker to spend a lot more time to create a rainbow table to lookup your passwords, making it far less likely...