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runOnUiThread vs Looper.getMainLooper().post in Android
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The following behaves the same when called from background threads:
using Looper.getMainLooper()
Runnable task = getTask();
new Handler(Looper.getMainLooper()).post(task);
using Activity#runOnUiThread()
Runnable task = getTask();
runOnUiThread(task);
Th...
How to read from stdin line by line in Node
I'm looking to process a text file with node using a command line call like:
6 Answers
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What is the difference between JAX-RS and JAX-WS?
...evices, such as PDAs and mobile phones"?
3) REST based architectures typically will use a lightweight data format, like JSON, to send data back and forth. This is in contrast to JAX-WS which uses XML. I don't see XML by itself so significantly heavier than JSON (which some people may argue), but w...
Why can I use auto on a private type?
... the type is merely an alias for the actual type. What does it matter if I call it Bar or SomeDeducedType? It's not like I can use it to get to private members of class Foo or anything.
– einpoklum
Dec 1 '15 at 23:15
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How to open a file for both reading and writing?
...ting at the same time. This is not different from using the fopen() system call since file() / open() is just a tiny wrapper around this operating system call.
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Assigning code to a variable
...s:
var ButtonClicked = new Action(() => MessageBox.Show("hi"));
Then call it:
ButtonClicked();
For completeness (in regards to the various comments)...
As Erik stated, you could execute multiple lines of code:
var ButtonClicked = new Action(() =>
{
MessageBox.Show("hi");
Messa...
How to get the last N rows of a pandas DataFrame?
...7 c 8
df[-3:]
A B
5 b 6
6 b 7
7 c 8
This is the same as calling df.iloc[-3:], for instance (iloc internally delegates to __getitem__).
As an aside, if you want to find the last N rows for each group, use groupby and GroupBy.tail:
df.groupby('A').tail(2)
A B
1 a 2
2 a ...
How to structure a express.js application?
...app = module.exports = express.createServer();
bootstrap(app);
This basically means I place all my bootstrapping in a seperate file, then I bootstrap the server.
So what does bootstrap do?
var configure = require("./app-configure.js"),
less = require("./watch-less.js"),
everyauth = requ...
What does [:] mean?
...at they want with the slice.
In the context of:
x = obj[:]
This will call obj.__getitem__ with the slice object passed in. In fact, this is completely equivalent to:
x = obj[slice(None,None,None)]
(although the former is probably more efficient because it doesn't have to look up the slice ...
How to import an excel file in to a MySQL database
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There's a simple online tool that can do this called sqlizer.io.
You upload an XLSX file to it, enter a sheet name and cell range, and it will generate a CREATE TABLE statement and a bunch of INSERT statements to import all your data into a MySQL database.
(Disclaim...