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Why does int i = 1024 * 1024 * 1024 * 1024 compile without error?
... @WUJ This answer IMHO provides additional insight and perspective. After reading all the answers I found this answer to provide just as much validity as the other answers provided. Also it raises the awareness that developers are not the only implementors of some software products.
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Why do we not have a virtual constructor in C++?
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I was wondering how the question even made sense until I read this explanation of how object creation works in other languages. +1.
– j_random_hacker
Apr 9 '09 at 10:39
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Proper usage of Optional.ifPresent()
...y going to use the Optional class, the most simple code is what you have already written ...
if (user.isPresent())
{
doSomethingWithUser(user.get());
}
This code has the advantages of being
readable
easy to debug (breakpoint)
not tricky
Just because Oracle has added the Optional class ...
How can I tell PyCharm what type a parameter is expected to be?
... run-time type-checking. This is both more convenient to use and easier to read than doing the same by assertions and can be used selectively just the same. typecheck-decorator is one such package and has a summary of the others in its documentation. (Flexible, too: you can even do type-checked duck...
How to get a specific version of a file in Mercurial?
...t of commands. It's a rather large and somewhat daunting list, but if you read through it, you'll find this line:
revert restore individual files or directories to an earlier state
Now, if you just want the last state for comparison purposes, there is another command you may be interested ...
Disable all table constraints in Oracle
...
Warning: if you have already DISABLED contraints, all constraints will be activated using that PL/SQL procedure. You have to filter those contraints on the where to ensure they keep disabled.
– nachouve
Nov 24...
Can I export a variable to the environment from a bash script without sourcing it?
...re are several possible workarounds.
The most obvious one, which you've already mentioned, is to use source or . to execute the script in the context of the calling shell:
$ cat set-vars1.sh
export FOO=BAR
$ . set-vars1.sh
$ echo $FOO
BAR
Another way is to have the script, rather than setting ...
How to check if running in Cygwin, Mac or Linux?
...re actually running within CygWin (the bash shell of it) so paths should already be correctly set up. As one commenter notes, you can run the bash program, passing the script, from cmd itself and this may result in the paths not being set up as needed.
If you are doing that, it's your responsibilit...
PostgreSQL Crosstab Query
...ensive with a cost of 91.38. It also produces about twice as many physical reads and performs hash joins - which can be quite expensive compared to other join types.
– Jeremiah Peschka
Jun 9 '10 at 1:41
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How to use C++ in Go
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You can't quite yet from what I read in the FAQ:
Do Go programs link with C/C++ programs?
There are two Go compiler implementations, gc (the 6g program and friends) and gccgo. Gc uses a different calling convention and linker and can therefore only...