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Fastest hash for non-cryptographic uses?
...at CRC32 will have more collisions than MD5 or even SHA-1 hashes, simply because of the reduced length (32 bits compared to 128 bits respectively 160 bits). But if you just want to check whether a stored string is corrupted, you'll be fine with CRC32.
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Django - limiting query results
...ts are lazy. That means a query will hit the database only when you specifically ask for the result.
So until you print or actually use the result of a query you can filter further with no database access.
As you can see below your code only executes one sql query to fetch only the last 10 items....
C# short/long/int literal format?
In C / C# / etc. you can tell the compiler that a literal number is not what it appears to be (ie., float instead of double , unsigned long instead of int :
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Why don't Java's +=, -=, *=, /= compound assignment operators require casting?
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As always with these questions, the JLS holds the answer. In this case §15.26.2 Compound Assignment Operators. An extract:
A compound assignment expression of the form E1 op= E2 is equivalent to E1 = (T)((E1) op (E2)), where T is the type of E1, except that E1 is evaluated only o...
Ignore modified (but not committed) files in git?
Can I tell git to ignore files that are modified (deleted) but should not be committed?
5 Answers
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What is the difference between trie and radix trie data structures?
...x tree takes less memory, but it is harder to implement. Otherwise the use case of both is pretty much the same.
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In tmux can I resize a pane to an absolute value
... answered Apr 23 '13 at 0:26
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What do hjust and vjust do when making a plot using ggplot?
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Source: ggplot2, Hadley Wickham, page 196
(Yes, I know that in most cases you can use it beyond this range, but don't expect it to behave in any specific way. This is outside spec.)
hjust controls horizontal justification and vjust controls vertical justification.
An example should make th...
Re-entrant locks in C#
...e same object. The recursive code effectively already has the lock and so can continue unhindered.
lock(object) {...} is shorthand for using the Monitor class. As Marc points out, Monitor allows re-entrancy, so repeated attempts to lock on an object on which the current thread already has a lock ...
Do you need to use path.join in node.js?
...g either forward or backward slashes as path separators (this has been the case since back in the DOS days). The only real issue is that Windows command-line processors (or, more specifically, Windows-native command-line utilities) tend to interpret forward slashes as option specifiers rather than p...