|
Booleans seem to be the most primitive building blocks of programming languages, because they can actually take only two (or in some cases three) "singleton" values: true, false (and sometimes undeterminded/null)
But it seems that sometimes language design...
Started by SztupY on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
And although the....
In Java:
Boolean true1 = new Boolean(true); Boolean true2 = new Boolean(true); System.out.println("true == true: " + (true1 == true2));
The reason why this prints false is that == checks for object identity.
|
|
Hi,
Simple query, possibly impossible but I know there are some clever people out there :)
Given a boolean parameter, I wish to define my where clause to either limit a certain column's output - or do nothing.
So, given parameter @bit = 1 this would be...
Started by Tabloo Quijico on
, 9 posts
by 9 people.
Answer Snippets (Read the full thread at stackoverflow):
SELECT * FROM mytable WHERE column = 1 OR @bit = 0
If you have an index on column1 , this one will be more efficient:
SELECT * FROM mytable WHERE column = 1 AND @bit = 1 UNION ALL SELECT * FROM mytable WHERE @bit = 0
See this article in my blog for performance... .
|
|
How would you convert an array of booleans to a string like "false, true, true, false" - using as few lines of code as possible?
Python allows me to use the following (very nice and clean):
", ".join(map(str, [False, True, True, False]))
In C#, string...
Started by AndiDog on
, 7 posts
by 7 people.
Answer Snippets (Read the full thread at stackoverflow):
Var boolStrings = string.Join(",", new List<bool> { false, true, true, false } .ConvertAll(x => x.ToString()).ToArray());
How about:
String.Join(", ", new List<Boolean>() { true, false, false, true }.ConvertAll....
|
Ask your Facebook Friends
|
True.ToString() false.toString(); Output: True False
Is there a valid reason for it being "True" and not "true"? It breaks when writing XML as it's boolean type is lower case, and also isn't compatible with C#'s true/false (not sure about CLS though)....
Started by Chris S on
, 8 posts
by 8 people.
Answer Snippets (Read the full thread at stackoverflow):
Not so simple to convert....
And the parsing is done by comparing the value to Boolean.TrueString or Boolean.FalseString which are "True() { if (!this) { return "False"; } return "True"; }
It's simple code to convert that to all lower case.
|
|
I am using xmllint --schema option to validate my XML that looks like this
<XML> <Active>True</Active> </XML>
In my schema file, I have following line that describes Active element.
<xsd:element name="Active" type="xsd:boolean...
Started by SoichiH on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
3.2.2.2 Canonical representation The canonical representation for boolean is the set of literals... .
True the following legal literals {true, false, 1, 0}.
According to the XML Schema specification , a boolean is true or false .
You cannot.
|
|
I am new to programming, and am wondering if there is a correct way to order your control structure logic.
It seems more natural to check for the most likely case first, but I have the feeling that some control structures won't work unless they check ...
Started by htxt on
, 10 posts
by 10 people.
Answer Snippets (Read the full thread at stackoverflow):
It should be easy to drop through the normal case .
Or perhaps pulled out into a separate method.)
if( condition is true ) { do something small; } else that's fastest and most likely to be true is performed first.
|
|
Just read on an internal university thread:
#include <iostream> using namespace std; union zt { bool b; int i; }; int main() { zt w; bool a,b; a=1; b=2; cerr<<(bool)2<<static_cast<bool>(2)<<endl; //11 cerr<<a<<...
Started by SztupY on
, 9 posts
by 9 people.
Answer Snippets (Read the full thread at stackoverflow):
Code generated by the compiler will look more like:
bool z = (x != 0) ? true : false;
However bit pattern in a bool variable is equivalent to true , especially for doing logical operations like the compiler be aware that during boolean ....
|
|
Hi,
I have to create a query that checks across several different columns, and if any of them have a 1, I want to return true.
Ideal output would be along the lines of:
ID:55
Name:John Doe
IsDealerType1:True
IsDealerType2:True
IsDealerType3:False
IsDealerType...
Started by Bryan on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
CASE WHEN (1a + 1b + 1c + 1d) > 0 THEN 1 ELSE 0 END as IsDealerType1
I like Russel's, but I'm gonna add this as well:
CASE WHEN 1 IN (1a,1b,1c,1d) THEN 1 ELSE 0 END As IsDealerType1
In SQL the BIT types cannot be used in boolean expressions (d'oh... .
|
|
As part of answering another question, I wrote the following code whose behaviour seems bizarre at first glance:
print True # outputs true True = False; print True # outputs false True = True; print True # outputs false True = not True; print True # outputs...
Started by paxdiablo on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
Imagine this instead:
A = True B = False print A # true A = B; print A # false A = A; print A # false, because A is still false from....
In 2.x, True and False are not keywords so it's possible to shadow the built-ins in this manner.
|
|
Kovu Post subject: Re: The *True* True Mirror Wiki Posted: Thu May 20, 2010 11:15 pm Lion
Joined: Mon May 03, 2010 7:27 pm
Posts: 3120
Location: Pride Rock - One day when I'm big and strong...I will be a King! I approve of this topic.
At some point I ...
Answer Snippets (Read the full thread at freeforums):
At some point i might actually make one page on there .
|
