Top "Boolean" questions

Why use !! when converting int to bool?

What can be a reason for converting an integer to a boolean in this way? bool booleanValue = !!integerValue; instead of …

c++ integer boolean

Comparing previous row values in Pandas DataFrame

import pandas as pd data={'col1':[1,3,3,1,2,3,2,2]} df=pd.DataFrame(data,columns=['col1']) print df col1 0 1 1 3 2 3 3 1 4 2 5 3 6 2 7 2 I have the …

python pandas numpy boolean shift

What is the difference between Convert.ToBoolean(string) and Boolean.Parse(string)?

What is the difference between the two methods Convert.ToBoolean() and Boolean.Parse()? Is there any reason to use one …

c# parsing boolean

Boolean != false

In Java, you would usually say that if(someBool != false) is the same as if(someBool) But what if someBool …

java boolean autoboxing

How do I compare string and boolean in Javascript?

I got the Json "false" from server. I respond as bool but it's Json so it's in browser type is …

javascript string comparison boolean-logic boolean

Dealing with TRUE, FALSE, NA and NaN

Here is a vector a <- c(TRUE, FALSE, FALSE, NA, FALSE, TRUE, NA, FALSE, TRUE) I'd like a …

r boolean logical-operators na r-faq

Python AND operator on two boolean lists - how?

I have two boolean lists, e.g., x=[True,True,False,False] y=[True,False,True,False] I want to …

python list boolean operator-keyword

Do the &= and |= operators for bool short-circuit?

When writing code like this in C++: bool allTrue = true; allTrue = allTrue && check_foo(); allTrue = allTrue && …

c++ boolean lazy-evaluation short-circuiting compound-assignment

WPF Radiobutton (two) (binding to boolean value)

I have a property of type boolean presented with checkbox. I want to change that to two radiobuttons that bind …

wpf binding radio-button boolean

Running SQL user defined function that returns boolean, in where clause

Hope this doesn't seem too simple. I've looked this up but I'm not so good at SQL user defined functions …

sql function sql-server-2008-r2 boolean where-clause