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Difference between JVM and HotSpot?
...ne code.
HotSpot is an an implementation of the JVM concept. It was originally developed by Sun and now it is owned by Oracle. There are other implementations of the JVM specification, like JRockit, IBM J9, among many others.
See List of Java Virtual Machine Implementations
The OpenJDK is a proj...
In C# what is the difference between a destructor and a Finalize method in a class?
...em.Object.Finalize method. You have to use destructor syntax to do so. Manually overriding Finalize will give you an error message.
Basically what you are trying to do with your Finalize method declaration is hiding the method of the base class. It will cause the compiler to issue a warning which ...
What does the star operator mean, in a function call?
...ues = (1, 2)
s = sum(*values)
This will unpack the tuple so that it actually executes as:
s = sum(1, 2)
The double star ** does the same, only using a dictionary and thus named arguments:
values = { 'a': 1, 'b': 2 }
s = sum(**values)
You can also combine:
def sum(a, b, c, d):
return a ...
How to plot two columns of a pandas data frame using points?
...
You can specify the style of the plotted line when calling df.plot:
df.plot(x='col_name_1', y='col_name_2', style='o')
The style argument can also be a dict or list, e.g.:
import numpy as np
import pandas as pd
d = {'one' : np.random.rand(10),
'two' : np.random.rand(...
How do I create a multiline Python string with inline variables?
...
This isn't really the same because the OP wants named parameters, not positional ones.
– Ismail Badawi
Apr 11 '12 at 19:33
...
Iterating through a JSON object
..._raw= raw.readlines()
json_object = json.loads(json_raw[0])
you should really just do:
json_object = json.load(raw)
You shouldn't think of what you get as a "JSON object". What you have is a list. The list contains two dicts. The dicts contain various key/value pairs, all strings. When you do j...
Aren't Python strings immutable? Then why does a + “ ” + b work?
...the variable a to point at a new string "Dog eats treats". You didn't actually mutate the string "Dog". Strings are immutable, variables can point at whatever they want.
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Java heap terminology: young, old and permanent generations?
... permanent generations are in the Java heap terminology, and more specifically the interactions between the three generations.
...
ViewPager and fragments — what's the right way to store fragment's state?
...agment will be placed. FragmentPagerAdapter.getItem(int position) is only called when a fragment for that position does not exist. After rotating, Android will notice that it already created/saved a fragment for this particular position and so it simply tries to reconnect with it with FragmentManage...
Using @include vs @extend in Sass?
...
Extends do not allow customization, but they produce very efficient CSS.
%button
background-color: lightgrey
&:hover, &:active
background-color: white
a
@extend %button
button
@extend %button
Result:
a, button {
...