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Converting strings to floats in a DataFrame
...rt say a complete string column
In [10]: df = DataFrame(dict(A = Series(['1.0','1']), B = Series(['1.0','foo'])))
In [11]: df
Out[11]:
A B
0 1.0 1.0
1 1 foo
In [12]: df.dtypes
Out[12]:
A object
B object
dtype: object
In [13]: df.convert_objects(convert_numeric=True)
Out[13]...
What does 'stale file handle' in Linux mean?
Say I have a terminal open, and through that terminal I have cd 'ed to some directory. Through another terminal, I delete that directory and restore it back from an identical backup. When I try to vim a file from the first terminal, in the same directory, why do I get an error about a stale file ...
Does use of final keyword in Java improve the performance?
... final does make a significant difference.
– Casper Færgemand
Apr 3 '14 at 13:05
6
...
In which order should floats be added to get the most precise result?
...lt;cmath>
int main()
{
long billion = 1000000000;
double big = 1.0;
double small = 1e-9;
double expected = 2.0;
double sum = big;
for (long i = 0; i < billion; ++i)
sum += small;
std::cout << std::scientific << std::setprecision(1) << big...
Can I change the Android startActivity() transition animation?
...roid"
android:fillAfter="true">
<alpha android:fromAlpha="1.0"
android:toAlpha="0.0"
android:duration="500"/> //Time in milliseconds
</set>
In your finish-class
private void finishTask() {
if("blabbla".equals("blablabla"){
finish();
...
What characters do I need to escape in XML documents?
...ee characters ", ' and > needn't be escaped in text:
<?xml version="1.0"?>
<valid>"'></valid>
Attributes
The safe way is to escape all five characters in attributes. However, the > character needn't be escaped in attributes:
<?xml version="1.0"?>
<valid attri...
Socket.IO - how do I get a list of connected sockets/clients?
...one in the future
NOTE: This Solution ONLY works with version prior to 1.0
UPDATED 2020 Mar 06
From 1.x and above, please refer to this link: getting how many people are in a chat room in socket.io
share
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Check play state of AVPlayer
...o play something while in airplane mode, the AVPlayer rate is still set to 1.0, since it implies the intention to play.
– phi
May 31 '13 at 13:13
4
...
What is bootstrapping?
I keep seeing "bootstrapping" mentioned in discussions of application development. It seems both widespread and important, but I've yet to come across even a poor explanation of what bootstrapping actually is; rather, it seems as though everyone is just supposed to know what it means. I don't, tho...
What is WEB-INF used for in a Java EE web application?
...
The change in Servlet 3.0 & 3.1 (JSR 340) allows serving static resources and JSPs from within a JAR stored in WEB-INF/lib. To quote the Servlet 3.1 spec section 10.5: Except for static resources and JSPs packaged in the META- INF/resources of a JAR fil...