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How to check if a table exists in a given schema
...ly those tables and views are shown that the current user has access
to (by way of being the owner or having some privilege).
The query provided by @kong can return FALSE, but the table can still exist. It answers the question:
How to check whether a table (or view) exists, and the current user...
Why does changing the returned variable in a finally block not change the return value?
...value of s at the time the return statement executes is the value returned by the method. The fact that the finally clause later changes the value of s (after the return statement completes) does not (at that point) change the return value.
Note that the above deals with changes to the value of s it...
Things possible in IntelliJ that aren't possible in Eclipse?
I have heard from people who have switched either way and who swear by the one or the other.
41 Answers
...
Python (and Python C API): __new__ versus __init__
...or an immutable type, as it would allow them to be modified after creation by calling obj.__init__(*args).
Compare the behaviour of tuple and list:
>>> x = (1, 2)
>>> x
(1, 2)
>>> x.__init__([3, 4])
>>> x # tuple.__init__ does nothing
(1, 2)
>>> y = [1,...
Is returning null bad design? [closed]
...r one pointers to objects. (That's certainly how it's explicitly modelled by Haskell's Maybe in those cases, and is all the better for doing so.)
– Andrzej Doyle
Aug 6 '12 at 14:37
...
How to prevent that the password to decrypt the private key has to be entered every time when using
... '~' refers to your "home directory". In Windows, you can find this by opening a command shell (cmd) and typing "echo %USERPROFILE%".
– Hawkeye Parker
Aug 28 '12 at 23:56
14...
Check whether a string contains a substring
...es are needed because a . can match any character. You can get around this by using the \Q and \E operators.
my $substring = "s1.domain.com";
if ($mystring =~ /\Q$substring\E/) {
print qq("$mystring" contains "$substring"\n);
}
Or, you can do as eugene y stated and use the index function. ...
What are libtool's .la file for?
... # DLL
So libfoo.la is the only file that is preserved between platforms by libtool allowing to understand what happens with:
Library dependencies
Actual file names
Library version and revision
Without depending on a specific platform implementation of libraries.
...
Rails 3 datatypes?
...
and :references for polymorphic associations. See: api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/…
– Ethan
Jan 25 '12 at 8:46
...
Why does installing Nokogiri on Mac OS fail with libiconv is missing?
...er. If you already have it installed, be sure to grab the latest formulae by updating like so:
brew update
Note: In OSX 10.9+ you may need to install xCode command tools to allow you to install libiconv.
xcode-select --install
then install a newer version of libiconv
brew install libiconv
...