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What is this crazy C++11 syntax ==> struct : bar {} foo {};?
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First, we'll take a bog-standard abstract UDT (User-Defined Type):
struct foo { virtual void f() = 0; }; // normal abstract type
foo obj;
// error: cannot declare variable 'obj' to be of abstract type 'foo'
Let's also recall that we can instantiate...
How to plot multiple functions on the same figure, in Matplotlib?
How can I plot the following 3 functions (i.e. sin , cos and the addition), on the domain t , in the same figure?
3 Ans...
How to add 10 days to current time in Rails
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10.days.from_now
Both definitely work. Are you sure you're in Rails and not just Ruby?
If you definitely are in Rails, where are you trying to run this from? Note that Active Support has to be loaded.
share
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Referring to a file relative to executing script
... case, this problem has no solution. Any approach you might have heard of, and any approach that will be detailed below, has flaws and will only work in specific cases. First and foremost, try to avoid the problem entirely by not depending on the location of your script!
If you need to write a ver...
Converting NumPy array into Python List structure?
...nvert a NumPy array to a Python List (for example [[1,2,3],[4,5,6]] ), and do it reasonably fast?
5 Answers
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DateTime.ToString(“MM/dd/yyyy HH:mm:ss.fff”) resulted in something like “09/14/2013 07.20.31.371”
...Your user must be in a culture where the time separator is a dot. Both ":" and "/" are interpreted in a culture-sensitive way in custom date and time formats.
How can I make sure the result string is delimited by colon instead of dot?
I'd suggest specifying CultureInfo.InvariantCulture:
strin...
Sort rows in data.table in decreasing order on string key `order(-x,v)` gives error on data.table 1.
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Update
data.table v1.9.6+ now supports OP's original attempt and the following answer is no longer necessary.
You can use DT[order(-rank(x), y)].
x y v
1: c 1 7
2: c 3 8
3: c 6 9
4: b 1 1
5: b 3 2
6: b 6 3
7: a 1 4
8: a 3 5
9: a 6 6
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How to stop text from taking up more than 1 line?
...ap or any other attribute that stops text from wrapping? I have a height, and overflow:hidden , and the text still breaks.
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How do I get the name of captured groups in a C# Regex?
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Use GetGroupNames to get the list of groups in an expression and then iterate over those, using the names as keys into the groups collection.
For example,
GroupCollection groups = regex.Match(line).Groups;
foreach (string groupName in regex.GetGroupNames())
{
Console.WriteLine(
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Colorize console output in Intellij products
...custom script with a default output. I'd like to colorize errors, warnings and infos. There's a way to do that in Intellij products (IDEA, PhpStorm, PyCharm)?
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