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What is stack unwinding?
...when the scope is exited (here the scope is of the function func.) This is done by the compiler inserting calls to destructors of automatic (stack) variables.
Now this is a very powerful concept leading to the technique called RAII, that is Resource Acquisition Is Initialization, that helps us mana...
Should I implement __ne__ in terms of __eq__ in Python?
...eems to make sense that I should override the __ne__ method as well, but does it make sense to implement __ne__ in terms of __eq__ as such?
...
Struct like objects in Java
...defensive programming - someday getters and setters may be helpful, and it doesn't cost a lot to create/use them. So they are sometimes useful.
In practice, most fields have simple getters and setters. A possible solution would look like this:
public property String foo;
a->Foo = b->Foo;...
Why should eval be avoided in Bash, and what should I use instead?
...t of println on each call, but for the sake of example, we're not going to do that. We'll need to use eval, since variables can't be used to redirect output.
function println
{
eval printf "$2\n" "${@:3}" $1
}
function error
{
println '>&2' '\e[31mError (%d): %s\e[m' "$1" "${*:2}"
...
Git on Windows: How do you set up a mergetool?
...sing p4merge (free cross-platform 3way merge tool); tested on msys Git (Windows) install:
git config --global merge.tool p4merge
git config --global mergetool.p4merge.cmd 'p4merge.exe \"$BASE\" \"$LOCAL\" \"$REMOTE\" \"$MERGED\"'
or, from a windows cmd.exe shell, the second line becomes :
git co...
Performing a Stress Test on Web Application?
...services, database, just about anything that uses requests basically).
It does however have a steep learning curve once you start getting to complicated tests, but it's well worth it. You can get up and running very quickly, and depending on what sort of stress-testing you want to do, that might be...
Postgres: How to do Composite keys?
...
Your compound PRIMARY KEY specification already does what you want. Omit the line that's giving you a syntax error, and omit the redundant CONSTRAINT (already implied), too:
CREATE TABLE tags
(
question_id INTEGER NOT NULL,
tag_id SER...
How to do a git diff on moved/renamed file?
I moved a file using git mv . Now I would like to do a diff on the new file to compare it with the old file (with the old, now non-existent name).
...
MongoDB atomic “findOrCreate”: findOne, insert if nonexistent, but do not update
as the title says, I want to perform a find (one) for a document, by _id, and if doesn't exist, have it created, then whether it was found or was created, have it returned in the callback.
...
Commands out of sync; you can't run this command now
...
I agree, mysqli is a bit brain-damaged. It does do the right thing with the PDO mysql driver though.
– user42092
Mar 5 '09 at 13:59
17
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