boolean-operations Questions
3
The attached screen shot says it all: I have a valid true Bool, I negate it with the bang operator, and (Xcode tells me) I have an invalid value.
It appears that this "invalid" value does behave a...
Sonority asked 15/12, 2016 at 20:45
6
Solved
I don't understand the meaning of the Python code line:
parameter and (" " + parameter) or ""
which is using strings along with logical operators and and or. Also the type of t...
Agora asked 6/10, 2013 at 20:22
4
Solved
For example, I would like to create a mask that masks elements with value between 40 and 60:
foo = np.asanyarray(range(100))
mask = (foo < 40).__or__(foo > 60)
Which just looks ugly. I...
Prostatectomy asked 25/12, 2011 at 23:3
8
Solved
Could you please explain the De Morgan's rules as simply as possible (e.g. to someone with only a secondary school mathematics background)?
Resupine asked 30/1, 2010 at 16:50
2
Solved
I'm working with masked arrays thanks to some of the help I've gotten on stackoverflow, but I'm running into a problem with the np.where evaluation of a masked array.
My masked array is:
m_pt0 = ...
Bohman asked 3/5, 2017 at 13:26
2
Solved
I have nested lists of truth values representing SAT forumlas, like this:
[[[0, True, False], [0, True, False], [0, True, 1]], [[0, True, True], [2, True, True], [3, False, True]], [[1, False, Fal...
Photogram asked 8/7, 2016 at 23:43
2
Solved
In three.js there is a function triangulateShape(). Now I encountered a failure to triangulate polygons that are simplified using Javascript Clipper. Simplifying in Clipper is done using Unioning. ...
Spirograph asked 23/4, 2013 at 0:24
24
Solved
In natural languages, we would say "some color is a primary color if the color is red, blue, or yellow."
In every programming language I've seen, that translates into something like:
isP...
Fiducial asked 8/7, 2010 at 15:11
4
Solved
The following code doesn't compile
#include <vector>
int main()
{
std::vector<bool> enable(10);
enable[0] |= true;
return 0;
}
giving the error
no match for ‘operator|=’ (operand...
Zippora asked 5/3, 2015 at 16:35
2
I have a hidden field. Where I need to set a Boolean value intitially. After some operation I need to update the hidden filed value using JavaScript. But we can only store string value in hidden fi...
Thermostat asked 5/1, 2015 at 8:31
6
Solved
If I have the following booleans
const YESTERDAY = false;
const TODAY = true;
const TOMORROW = false;
What code can I write to make sure exactly one is true?
I've tried this:
$x = self::YESTER...
Virago asked 30/1, 2012 at 11:28
5
Solved
For example, if you have n lists of bools of the same length, then elementwise boolean AND should return another list of that length that has True in those positions where all the input lists have ...
Greenshank asked 5/5, 2010 at 3:36
5
Solved
I heard that often "everything" besides 0 is true. But now very strange things are happening to me... or I just think that I do it in correct way while I don't. Here's what is happening:
When I wa...
Coactive asked 18/5, 2014 at 21:22
1
Solved
For example, if I have an expression like
x=True or True
if I evaluate in the shell the result is True
print(x)
x=True
So now I want to convert a string or an input to direct to that logic exp...
Terrill asked 3/3, 2014 at 4:28
2
Solved
I wrote a function to compare file versions between what a client currently has and the latest version of the file on a server. The client passes the "quad" (Major.Minor.Build.Private) version numb...
Allistir asked 20/2, 2014 at 16:52
2
Solved
Does Matlab have a Boolean (sometimes called logical or binary) matrix multiplication function? I'm specifically talking about what's usually denoted by a circle with a dot in it to denote Boolean ...
Pizzicato asked 16/11, 2013 at 4:49
1
Solved
The If statement and any other boolean comparison is smart enought to stop at first FALSE value when evaluating A and B and C and D and at first TRUE value when evaluating A or B or C or D.
What i...
Almanac asked 3/9, 2013 at 17:48
2
Solved
0 == false and '0' == false are both 'true'
However, (true && 0) is 'false', while (true && '0') is 'true'.
Why?
Confrere asked 27/6, 2013 at 2:7
7
Solved
So there's this page on the php site which shows the result of comparing different values:
http://php.net/manual/en/types.comparisons.php
This is a helpful reference, but I would rather not have ...
Gainful asked 16/4, 2013 at 22:28
3
Solved
I have some function like
(A and ( B or c)) or (D and E and (F or H or R or P )))
and I want to convert that function to function with only and operations (of course if possible)
I find that wi...
Characteristic asked 16/11, 2012 at 14:40
1
Solved
I have a vector v and I want to find all those elements, that have values between 4 and 7.
v = c(1:9)
# indices of elements with values larger than 4
which(v > 4)
# indices of elements with va...
Flatto asked 9/11, 2012 at 9:55
1
Solved
I found a really good example about boolean translator,
* Boolean expression (grammar) parser in c++
What I am thinking now is to do a further step, translate (!T|F)&T into F or 0, so it is ve...
Huntlee asked 26/9, 2012 at 8:56
1
Solved
The wiki article for self-enumerating pangrams states that they are computed using Binary Decision Diagrams. I've been reading about BDDs and from my understanding you need to represent some proble...
Axiomatic asked 5/9, 2012 at 21:42
6
Solved
Say, if I have a DN string, something like this:
OU=Karen,OU=Office,OU=admin,DC=corp,DC=Fabrikam,DC=COM
How to make a regular expression to pick only DNs that have both OU=Karen and OU=admin?
Andrews asked 31/5, 2012 at 4:32
2
Solved
Possible Duplicate:
Why are there no ||= or &&= operators?
By pure accident I found out today that
a &= GetBool();
is NOT the same as
a = a && GetBool();
I...
Flute asked 9/5, 2012 at 9:28
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