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Good reasons to prohibit inheritance in Java?
...re writing purely internal code this may be a bit of overkill. However the extra effort involved in adding five characters to a class file is very small. If you are writing only for internal comsumption then a future coder can always remove the 'final' - you can think of it as a warning saying "this...
Print list without brackets in a single row
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If some elements in names aren't strings, use print(', '.join(map(str,name))) instead.
– Anonymous
Dec 1 '19 at 9:43
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Determine the data types of a data frame's columns
...integer" "logical" "factor"
Using str() gets you that information plus extra goodies (such as the levels of your factors and the first few values of each variable):
str(my.data)
'data.frame': 5 obs. of 4 variables:
$ y : num 1.03 1.599 -0.818 0.872 -2.682
$ x1: int 1 2 3 4 5
$ x2: logi T...
Get loop counter/index using for…of syntax in JavaScript
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@klewis: %d formats an integer and %s formats a string. They’re based on printf. A spec is in progress at console.spec.whatwg.org/#formatter.
– Ry-♦
Aug 7 '19 at 13:39
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Learning Regular Expressions [closed]
...ou've ever used grep on Unix—even if only to search for ordinary looking strings—you've already been using regular expressions! (The re in grep refers to regular expressions.)
Order from the menu
Adding just a little complexity, you can match either 'Nick' or 'nick' with the pattern [Nn]ick. T...
Can someone explain Microsoft Unity?
...f Dependency Injection in ASP.NET Web API 2
public interface IShape
{
string Name { get; set; }
}
public class NoShape : IShape
{
public string Name { get; set; } = "I have No Shape";
}
public class Circle : IShape
{
public string Name { get; set; } = "Circle";
}
public class Rectang...
Call one constructor from another
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Like this:
public Sample(string str) : this(int.Parse(str)) { }
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Get current batchfile directory
...n used above, ending backslash or not) you will need to enclose the entire string in double quotes if path has spaces (i.e. "%batdir%ExtraDir"). You can always use PUSHD %~dp0. [https: // ss64.com/ nt/ syntax-args .html] has more on (%~) parameters.
Note that using (::) at beginning of a line makes...
Integer division: How do you produce a double?
... int to double is a widening primitive conversion.
You can get rid of the extra pair of parentheses by casting the denominator instead of the numerator:
double d = num / (double) denom;
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Initializing select with AngularJS and ng-repeat
..."the correct way" doesn't work sometimes (eg. if you want to translate the strings that populate the option names)
– btk
Mar 16 '15 at 21:10
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