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How can I drop all the tables in a PostgreSQL database?
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If all of your tables are in a single schema, this approach could work (below code assumes that the name of your schema is public)
DROP SCHEMA public CASCADE;
CREATE SCHEMA public;
If you are using PostgreSQL 9.3 or greater, you may also need to restore the default grants....
django urls without a trailing slash do not redirect
I've got two applications located on two separate computers. On computer A, in the urls.py file I have a line like the following:
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JavaScript editor within Eclipse [closed]
...o that you don't have to use a scripting language but can write the entire app in JS.
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notifyDataSetChanged example
I'm trying to use in my Android Application the notifyDataSetChanged() method for an ArrayAdapter but it doesn't work for me.
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Show or hide element in React
... component in the click handler using setState. When the state changes get applied, the render method gets called again with the new state:
var Search = React.createClass({
getInitialState: function() {
return { showResults: false };
},
onClick: function() {
thi...
What is the difference between mutex and critical section?
...ronization primitive (like an event or semaphore).
I wrote a quick sample app that compares the time between the two of them. On my system for 1,000,000 uncontended acquires and releases, a mutex takes over one second. A critical section takes ~50 ms for 1,000,000 acquires.
Here's the test code,...
Map a network drive to be used by a service
Suppose some Windows service uses code that wants mapped network drives and no UNC paths. How can I make the drive mapping available to the service's session when the service is started? Logging in as the service user and creating a persistent mapping will not establish the mapping in the context of...
Small Haskell program compiled with GHC into huge binary
...braries are copied in verbatim.
Aside: since this is a graphics-intensive app, I'd definitely compile with ghc -O2
There's two things you can do.
Stripping symbols
An easy solution: strip the binary:
$ strip A
$ du -hs A
5.8M A
Strip discards symbols from the object file. They are generall...
Unsupported major.minor version 52.0 [duplicate]
...Make sure the JDK home path is set to 1.8.
Restart IntelliJ IDEA.
Another approach which might help is by instructing IntelliJ IDEA which JDK version to start up with.
Go to: /Applications/IntelliJ\ IDEA\ 15\ CE.app/Contents/Info.plist
and replace the JVM version with:
<key>JVMVersion</key...
How to handle click event in Button Column in Datagridview?
I am developing a windows application using C#. I am using DataGridView to display data. I have added a button column in that. I want to know how can I handle click event on that button in DataGridView.
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