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Plotting two variables as lines using ggplot2 on the same graph
... nice example, but how to customize my own colours (E.g. black and orange)?, because it seems that you are using colour= as the variable name.
– Darwin PC
Oct 27 '15 at 14:23
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Why is a pure virtual function initialized by 0?
...He also states explicitly that this need not set the vtable entry to NULL, and that doing so is not the best way of implementing pure virtual functions.
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After submitting a POST form open a new window showing the result
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If you want to create and submit your form from Javascript as is in your question and you want to create popup window with custom features I propose this solution (I put comments above the lines i added):
var form = document.createElement("form")...
Why should I prefer to use member initialization lists?
... this case, the constructor for B will call the default constructor for A, and then initialize a.x to 3. A better way would be for B's constructor to directly call A's constructor in the initializer list:
B()
: a(3)
{
}
This would only call A's A(int) constructor and not its default constructo...
JavaScript ternary operator example with functions
...else syntax because I don't like to sacrifice readability - I'm old-school and I prefer my braces.
The full if/then/else format is used for pretty much everything. It's especially popular if you get into larger blocks of code in each branch, you have a muti-branched if/else tree, or multiple else/...
Unique fields that allow nulls in Django
...trings are equal to empty strings for uniqueness checks, under both Django and database rules.
You can force the admin interface to store NULL for an empty string by providing your own customized model form for Foo with a clean_bar method that turns the empty string into None:
class FooForm(forms....
Getting the last element of a split string array
...ement of a split array with multiple separators. The separators are commas and space. If there are no separators it should return the original string.
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Is it a good idea to use Google Guava library for Android development?
I am involved in the development of Android application which is a rather "thick" mobile client for a Web service. It heavily communicates with the server but also has a lot of inner logic too. So, I decided to use some features of Google Guava library to simplify development process. Here is a li...
UnicodeDecodeError: 'charmap' codec can't decode byte X in position Y: character maps to
...coding. Which one you have to figure out yourself. Common ones are Latin-1 and UTF-8. Since 0x90 doesn't actually mean anything in Latin-1, UTF-8 (where 0x90 is a continuation byte) is more likely.
You specify the encoding when you open the file:
file = open(filename, encoding="utf8")
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Is there a pattern for initializing objects created via a DI container
I am trying to get Unity to manage the creation of my objects and I want to have some initialization parameters that are not known until run-time:
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