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how to check the dtype of a column in python pandas
...treat numeric columns and string columns. What I am doing now is really dumb:
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How to declare a type as nullable in TypeScript?
...r undefined.
You can make the field optional which is different from nullable.
interface Employee1 {
name: string;
salary: number;
}
var a: Employee1 = { name: 'Bob', salary: 40000 }; // OK
var b: Employee1 = { name: 'Bob' }; // Not OK, you must have 'salary'
var c: Employee1 = { name: 'B...
Can a decorator of an instance method access the class?
I have something roughly like the following. Basically I need to access the class of an instance method from a decorator used upon the instance method in its definition.
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std::auto_ptr to std::unique_ptr
With the new standard coming (and parts already available in some compilers), the new type std::unique_ptr is supposed to be a replacement for std::auto_ptr .
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Notification click: activity already open
...notification and the activity is already opened, it's not started again, but just brought to front.
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socket.shutdown vs socket.close
I recently saw a bit of code that looked like this (with sock being a socket object of course):
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Inserting a PDF file in LaTeX
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IcyFlame
4,1401515 gold badges4242 silver badges6969 bronze badges
answered Apr 29 '10 at 18:16
MicaMica
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ruby convert array into function arguments
... the * (or "splat") operator:
a = [0, 1, 2, 3, 4] # => [0, 1, 2, 3, 4]
b = [2, 3] # => [2, 3]
a.slice(*b) # => [2, 3, 4]
Reference:
Array to Arguments Conversion
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What exactly does stringstream do?
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Sometimes it is very convenient to use stringstream to convert between strings and other numerical types. The usage of stringstream is similar to the usage of iostream, so it is not a burden to learn.
Stringstreams can be used to both read strings and write data into strings. It mainly ...
What is the advantage of GCC's __builtin_expect in if else statements?
I came across a #define in which they use __builtin_expect .
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