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How do I print the elements of a C++ vector in GDB?
... in GDB:
(gdb) print myVector
This will produce an output similar to:
$1 = std::vector of length 3, capacity 4 = {10, 20, 30}
To achieve above, you need to have gdb 7 (I tested it on gdb 7.01) and some python pretty-printer. Installation process of these is described on gdb wiki.
What is more...
Difference between a Seq and a List in Scala
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In Java terms, Scala's Seq would be Java's List, and Scala's List would be Java's LinkedList.
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How do I find the most recent git commit that modified a file?
... the one most recent commit, for example to use it in a script, use the -n 1 option:
git log -n 1 --pretty=format:%H -- my/file.c
--pretty=format:%h tells git log to show only the commit hash. The -- separater stops the file name from getting interpreted as a commit name, just in case it's ambigu...
What is the PostgreSQL equivalent for ISNULL()
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edited Jan 14 '12 at 2:28
Erwin Brandstetter
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std::vector performance regression when enabling C++11
...nteresting performance regression in a small C++ snippet, when I enable C++11:
1 Answer
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MySQL foreign key constraints, cascade delete
...-----+
| id | name | | id | name |
+----+------+ +----+---------+
| 1 | red | | 1 | mittens |
| 2 | blue | | 2 | boots |
+---++------+ +----+---------+
products_categories:
+------------+-------------+
| product_id | category_id |
+------------+-------------+
| 1 | 1 ...
How do you add an array to another array in Ruby and not end up with a multi-dimensional result?
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17 Answers
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Reuse a parameter in String.format?
...of the argument in the argument list. The first argument is referenced by "1$", the second by "2$", etc.
String.format("%1$s %1$s %1$s %1$s %1$s %1$s", hello);
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How can I delete one element from an array by value
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15 Answers
15
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Updating MySQL primary key
...update the primary key.
alter table xx drop primary key, add primary key(k1, k2, k3);
To fix things:
create table fixit (user_2, user_1, type, timestamp, n, primary key( user_2, user_1, type) );
lock table fixit write, user_interactions u write, user_interactions write;
insert into fixit
selec...