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What are the underlying data structures used for Redis?
...u have JSON or MessagePack you may just store objects as strings. In Redis 2.6 you can even manipulate this kind of object server side using Lua scripts.
Another interesting usage of strings is bitmaps, and in general random access arrays of bytes, since Redis exports commands to access random rang...
Get Enum from Description attribute [duplicate]
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edited Sep 16 at 8:23
Neo
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answered Dec 6 ...
Array to Hash Ruby
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a = ["item 1", "item 2", "item 3", "item 4"]
h = Hash[*a] # => { "item 1" => "item 2", "item 3" => "item 4" }
That's it. The * is called the splat operator.
One caveat per @Mike Lewis (in the comments): "Be very careful with this. Rub...
What does “static” mean in C?
...lt; 10; ++i)
foo();
}
This prints:
a = 15, sa = 15
a = 15, sa = 20
a = 15, sa = 25
a = 15, sa = 30
a = 15, sa = 35
a = 15, sa = 40
a = 15, sa = 45
a = 15, sa = 50
a = 15, sa = 55
a = 15, sa = 60
This is useful for cases where a function needs to keep some state between invocations, and ...
How to find memory leak in a C++ code/project?
I am a C++ programmer on the Windows platform. I am using Visual Studio 2008.
19 Answers
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When exactly is it leak safe to use (anonymous) inner classes?
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edited Oct 17 '18 at 18:23
community wiki
6 r...
JPA CascadeType.ALL does not delete orphans
...ments
delete all child elements
delete main row
close session
With JPA 2.0, you can now use the option orphanRemoval = true
@OneToMany(mappedBy="foo", orphanRemoval=true)
share
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improve this ...
How do I properly compare strings in C?
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285
You can't (usefully) compare strings using != or ==, you need to use strcmp:
while (strcmp(ch...
What does T&& (double ampersand) mean in C++11?
...e linked article on MSDN ("Rvalue References: C++0x Features in VC10, Part 2") is a very clear introduction to Rvalue references, but makes statements about Rvalue references that were once true in the draft C++11 standard, but are not true for the final one! Specifically, it says at various points ...
How to pause for specific amount of time? (Excel/VBA)
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129
Use the Wait method:
Application.Wait Now + #0:00:01#
or (for Excel 2010 and later):
Applic...