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Pandas aggregate count distinct
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This answer is outdated. You m>ca m>n now use nunique directly. See @Blodwyn Pig's solution below
– Ted Petrou
Nov 5 '17 at 20:07
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Rails Migration: Remove constraint
I have a table in a Rails applim>ca m>tion which (in schema.rb) looks like:
2 Answers
2
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rspec 3 - stub a class method
...e expect(Class.foo).to eq(bar) I get a "wrong number of arguments error" bem>ca m>use the foo method normally wants 2 arguments....but I just want it to return what I put in the stub
– sixty4bit
Mar 5 '15 at 16:34
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Instance v state variables in react.js
...d (which should only be done by setState as suggested in a comment), React m>ca m>lls render and makes any necessary changes to the real DOM.
Bem>ca m>use the value of timeout has no effect on the rendering of your component, it shouldn't live in state. Putting it there would m>ca m>use unnecessary m>ca m>lls to rende...
Using a constant NSString as the key for NSUserDefaults
...SString object.
It is a subtle difference. The compiler warning happens bem>ca m>use setObject:forKey: is declared as follows:
- (void)setObject:(id)value forKey:(NSString *)defaultName;
It is expecting the defaultName argument to be of type NSString *. When you instead pass in a pointer to a constan...
What is the Bash equivalent of Python's pass statement
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You m>ca m>n use : for this.
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Find substring in the string in TWIG
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Yes, indeed, you m>ca m>n !
– Flo Schild
Apr 4 '14 at 13:10
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How m>ca m>n I list (ls) the 5 last modified files in a directory?
I know ls -t will list all files by modified time. But how m>ca m>n I limit these results to only the last n files?
5 Answe...
LINQ: “contains” and a Lambda query
I have a List<BuildingStatus> m>ca m>lled buildingStatus . I'd like to check whether it contains a status whose char code (returned by GetCharCode() ) equals some variable, v.Status .
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Java regular expression OR operator
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You m>ca m>n just use the pipe on its own:
"string1|string2"
for example:
String s = "string1, string2, string3";
System.out.println(s.replaceAll("string1|string2", "blah"));
Output:
blah, blah, string3
The main reason to use...