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Two-way encryption: I need to store passwords that can be retrieved
...successfully encrypted using mcrypt, run it through base64_encode and then convert it to hex code. Once in hex code it's easy to transfer in a variety of ways.
$td = mcrypt_module_open('tripledes', '', 'ecb', '');
$iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
$key = substr("SUP...
Why do we need the “finally” clause in Python?
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@Mark Actually, sys.exit throws a normal exception. But yes, anything that causes the process to terminate immediately will mean that nothing else executes.
– Antimony
Jul 18 '12 at 23:52
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Most efficient way to concatenate strings?
...choice though not for perf reasons. It can be clumsy syntax. Resharper can convert back and forth at will.
– usr
May 8 '18 at 16:13
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Spring MVC type conversion : PropertyEditor or Converter?
I am looking for the easiest and simplest way to bind and convert data in Spring MVC. If possible, without doing any xml configuration.
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How do you get the logical xor of two variables in Python?
... the ^ operator):
from operator import xor
xor(bool(a), bool(b)) # Note: converting to bools is essential
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Why '&&' and not '&'?
...if you translate true to 1 and false to 0, then do bitwise operation, then convert non-zero to true and zero to false; it happens that the result will be the same had you just used logical operator (check this for exercise).
Another important distinction is also that a logical operator is short-cir...
What is “lifting” in Haskell?
...lt;a>. It applies a->b to every element of the container effectively converting it into functor<b>. When only first argument is supplied, a->b, fmap waits for the functor<a>. That is, supplying a->b alone turns this element-level function into the function functor<a> -&...
How to convert a PNG image to a SVG? [closed]
How to convert a PNG image to a SVG?
15 Answers
15
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MySQL, better to insert NULL or empty string?
...tching databases, is that Oracle does not support empty strings. They are converted to NULL automatically and you can't query for them using clauses like WHERE somefield = '' .
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How do I convert a git repository to mercurial?
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The hg convert utility isn't on by default after installation. In order to set it as such add the following to your .hgrc file.
[extensions]
hgext.convert=
If you're using TortoiseHg on Windows then this file resides in your home...