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Sorting a vector in descending order
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@Xeo Now they both finish in a second. Thanks!
– zw324
Jan 26 '12 at 21:03
3
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Is python's sorted() function guaranteed to be stable?
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They are stable.
By the way: you sometimes can ignore knowing whether sort and sorted are stable, by combining a multi-pass sort in a single-pass one.
For example, if you want to sort objects based on their last_name, first_name attributes, you can do it in one pass:
sorted_lis...
Using varchar(MAX) vs TEXT on SQL Server
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I didn't know that it would store in the page at 8k, and out of the page if larger. Very cool.
– Brain2000
May 11 '12 at 18:35
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Generating a random & unique 8 character string using MySQL
...no idea how many you could allocate before a collision (but it would be a known and constant value).
edit: This is now an old answer, but I saw it again with time on my hands, so, from observation...
Chance of all numbers = 2.35%
Chance of all letters = 0.05%
First collision when MD5(82945) = "7...
How to [recursively] Zip a directory in PHP?
... @Danjah: I've updated the code, should work for both *nix and Windows now.
– Alix Axel
Oct 18 '11 at 23:38
6
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Equivalent of varchar(max) in MySQL?
...ATE TABLE foo ( v VARCHAR(65532) );
Query OK, 0 rows affected (0.01 sec)
Now if we try to use a multibyte charset at the table level, we find that it counts each character as multiple bytes. UTF8 strings don't necessarily use multiple bytes per string, but MySQL can't assume you'll restrict all yo...
Assembly code vs Machine code vs Object code?
...he commands to new machine code and executes them. Modern interpreters are now much more complicated: evaluating whole sections of source code at a time, caching and optimizing where possible, and handling complex memory management tasks.
One final type of program involves the use of a runtime-envir...
(-2147483648> 0) returns true in C++?
... It is actually the equivalent of this pseudocode: operator -(2147483648)
Now, assuming your compiler has sizeof(int) equal to 4 and CHAR_BIT is defined as 8, that would make 2147483648 overflow the maximum signed value of an integer (2147483647). So what is the maximum plus one? Lets work that out...
When do we need curly braces around shell variables?
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{} is known as brace expansion. ${} is known as variable expansion. They do different things. I'd upvote you except for the no expansion bit.
– Spencer Rathbun
Jan 5 '12 at 21:52
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Are table names in MySQL case sensitive?
...u root -p variables | grep table to check that lower_case_table_names is 1 now
You might need to recreate these tables to make it work.
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