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Simulate CREATE DATABASE IF NOT EXISTS for PostgreSQL?
...k around it from within psql by executing the DDL statement conditionally:
SELECT 'CREATE DATABASE mydb'
WHERE NOT EXISTS (SELECT FROM pg_database WHERE datname = 'mydb')\gexec
The manual:
\gexec
Sends the current query buffer to the server, then treats each column of each row of the query's outpu...
How to generate string of a certain length to insert into a file to meet a file size criteria?
...
You can always use the a constructor for string which takes a char and a number of times you want that character repeated:
string myString = new string('*', 5000);
This gives you a string of 5000 stars - tweak to your needs.
...
performSelector may cause a leak because its selector is unknown
...ult of the method you're calling. The result could be anything: void, int, char, NSString *, id, etc. ARC normally gets this information from the header of the object type you're working with.3
There are really only 4 things that ARC would consider for the return value:4
Ignore non-object types (...
HTML Entity Decode [duplicate]
...ecifically to compensate for another IE8 bug.
– Greg Charles
Sep 10 '13 at 21:57
4
Careful with t...
Remove characters after specific character in string, then remove substring?
... when this seems kind of simple and there are tons of questions on strings/characters/regex, but I couldn't find quite what I needed (except in another language: Remove All Text After Certain Point ).
...
Is there a way to make a DIV unselectable?
...
I wrote a simple jQuery extension to disable selection some time back: Disabling Selection in jQuery. You can invoke it through $('.button').disableSelection();
Alternately, using CSS (cross-browser):
.button {
user-select: none;
-moz-user-select: none...
Is functional GUI programming possible? [closed]
... a functional controller in event driven MVVM and the use of discriminated unions and recursion for constructing a simple interface in the WPF controls demo by Flying Frog Consultancy.
– Funk
Jun 1 '16 at 10:08
...
How many and which are the uses of “const” in C++?
...p you to decide when and when not you need to copy.
struct MyString {
char * getData() { /* copy: caller might write */ return mData; }
char const* getData() const { return mData; }
};
Explanation: You might want to share data when you copy something as long as the data of the originally ...
java.sql.SQLException: Incorrect string value: '\xF0\x9F\x91\xBD\xF0\x9F…'
...e basic multilingual plane. They cannot be even represented in java as one char, "????????".length() == 4. They are definitely not null characters and one will see squares if you are not using fonts that support them.
MySQL's utf8 only supports basic multilingual plane, and you need to use utf8mb4 ...
How to get Visual Studio 'Publish' functionality to include files from post build event?
... project pick Unload Project. Then right click on the unloaded project and select Edit Project.
This statement will include all the targets and tasks that we need. Most of our customizations should be after that import, if you are not sure put if after! So if you have files to exclude there is an i...