logical-operators

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What does the exclamation mark mean in an Objective-C if statement?

I am wondering what the exclamation mark in if(!anObject) mean开发者_开发百科s.It is the boolean NOT operator also called negation.[详细]

2023-03-17 18:38 分类：问答
Logical AND + assignment in c++, safe?

I just learned this great pattern (from javascript actually) and I would like to apply it to my c++ code.[详细]

2023-03-16 20:30 分类：问答
OR and AND operation in C

I have a doubt in the program below. int main() { int i = -3,j = 2, k = 0,m; m = ++i || ++j && ++k;[详细]

2023-03-15 03:22 分类：问答
Usage of or operator in php?

The following code: $result = (false or true); echo(\"With extra parentheses: \".($result?\"true\":\"false\"));[详细]

2023-03-14 21:40 分类：问答
PHP - use variable as operator

I am trying to get th开发者_运维问答is: if($a[2] > $b[2] && $c[2] < 3) echo \"bingo\";[详细]

2023-03-12 02:13 分类：问答
Php If statement with && operator doesnt work (Logical And)

The code is as follows but the if && statement doesn\'t work. I am testing for both the drop-down and search box to be empty at the same-time yet when I select something from the drop down it[详细]

2023-03-10 22:10 分类：问答
Logical Operators, || or OR?

I remember reading a while back in regards to logical operators that开发者_运维技巧 in the case of OR, using || was better than or (or vice versa).[详细]

2023-03-06 07:04 分类：问答
How do I use the bitwise operator XOR in Lua?

How can I implement bitwise operators in Lua lang开发者_如何学Pythonuage? Specifically, I need a XOR operator/method.In Lua 5.2, you can use functions in bit32 library.[详细]

2023-03-05 04:00 分类：问答
bash operator for logical defined-or

Is there an equivalent Bash operator to Perl\'s logical defined-or?Some开发者_运维百科thing akin to:[详细]

2023-03-01 07:38 分类：问答
Using multiple criteria in subset function and logical operators

If I want to select a subset of data in R, I can use the subset f开发者_如何学JAVAunction. I wanted to base an analysis on data that that was matching one of a few criteria, e.g. that a certain variab[详细]

2023-03-01 01:13 分类：问答