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Is it possible to use 'else' in a list comprehension? [duplicate]
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The syntax a if b else c is a ternary operator in Python that evaluates to a if the condition b is true - otherwise, it evaluates to c. It can be used in comprehension statements:
>>> [a if a else 2 for a in [0,1,0,3]]
[2, 1, 2, 3]...
PHP Redirect with POST data
... this topic, and there are some experts who have said that it is not possible , so I would like to ask for an alternative solution.
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Padding characters in printf
I am writing a bash shell script to display if a process is running or not.
13 Answers
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How to make a Java class that implements one interface with two generic types?
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Consider encapsulation:
public class TwoTypesConsumer {
private TomatoConsumer tomatoConsumer = new TomatoConsumer();
private AppleConsumer appleConsumer = new AppleConsumer();
public void consume(Tomato t) {
tomatoConsumer.consu...
What is the difference between shallow copy, deepcopy and normal assignment operation?
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Normal assignment operations will simply point the new variable towards the existing object. The docs explain the difference between shallow and deep copies:
The difference between shallow and deep copying is only relevant for
compound objects (objects that contain other objects...
How is null + true a string?
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Bizarre as this may seem, it's simply following the rules from the C# language spec.
From section 7.3.4:
An operation of the form x op y, where op is an overloadable binary operator, x is an expression of type X, and y i...
A weighted version of random.choice
...hted version of random.choice (each element in the list has a different probability for being selected). This is what I came up with:
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How to save and restore multiple different sessions in Vim?
Depending on my task in Vim I have several tabs open.
14 Answers
14
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Convert column classes in data.table
I have a problem using data.table: How do I convert column classes? Here is a simple example: With data.frame I don't have a problem converting it, with data.table I just don't know how:
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How to print color in console using System.out.println?
...in). For example, you could define constants like these for the colors:
public static final String ANSI_RESET = "\u001B[0m";
public static final String ANSI_BLACK = "\u001B[30m";
public static final String ANSI_RED = "\u001B[31m";
public static final String ANSI_GREEN = "\u001B[32m";
public static ...