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What is a Manifest in Scala and when do you need it?
...ime can easily represent. A Manifest is a way for the compiler to send an inter-dimensional message to the code at runtime about the type information that was lost.
This is similar to how the Kleptonians have left encoded messages in fossil records and the "junk" DNA of humans. Due to limitations...
Mercurial move changes to a new branch
...et's say the changesets to move are revisions 1-3:
hg qimport -r 1:3 # convert revisions to patches
hg qpop -a # remove all them from history
hg branch new # start a new branch
hg qpush -a # push them all back into history
hg qfin -a # finalize the patches
...
Sending POST data in Android
...onnect();
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
}
References:
https://developer.android.com/reference/java/net/HttpURLConnection.html
How to add parameters to HttpURLConnection using POST using NameValuePair
Older A...
Difference between EXISTS and IN in SQL?
...
The exists keyword can be used in that way, but really it's intended as a way to avoid counting:
--this statement needs to check the entire table
select count(*) from [table] where ...
--this statement is true as soon as one match is found
exists ( select * from [table] where ... ...
Is it worth using Python's re.compile?
...er a quick glance at the actual Python 2.5 library code, I see that Python internally compiles AND CACHES regexes whenever you use them anyway (including calls to re.match()), so you're really only changing WHEN the regex gets compiled, and shouldn't be saving much time at all - only the time it tak...
Difference of keywords 'typename' and 'class' in templates?
...
typename and class are interchangeable in the basic case of specifying a template:
template<class T>
class Foo
{
};
and
template<typename T>
class Foo
{
};
are equivalent.
Having said that, there are specific cases where there is...
Why should I use a pointer rather than the object itself?
...jects in C++. But one thing that occurred to me is that people often use pointers to objects rather than the objects themselves, for example this declaration:
...
How to listen for a WebView finishing loading a URL?
I have a WebView that is loading a page from the Internet. I want to show a ProgressBar until the loading is complete.
...
Can I mask an input text in a bat file?
... cmd.exe scripts (such as if you have a lot of code that you don't want to convert), you can use the same trick.
First, modify the cmd script so it calls Powershell rather than CScript:
@echo off
for /f "delims=" %%i in ('powershell -file getpwd.ps1') do set passwd=%%i
The Powershell script is e...
Shortest distance between a point and a line segment
...t notice someone had supplied a 3D version. @RogiSolorzano, you'll need to convert the lat,long coordinates into x,y,z coordinates in 3-space first.
– Grumdrig
Dec 24 '17 at 5:42
...