Recent questions tagged operators

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operators - What does the => sign mean in Haskell?

For some reason I can't find the answer to this anywhere. I tried Googling "Haskell equal sign arrow" and ... but any help is appreciated here. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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833 views

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operators - How to bitwise shift in VB.NET?

How do I bitwise shift right/left in VB.NET? Does it even have operators for this, or do I have to use some utility method? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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727 views

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operators - How to avoid short circuit evaluation in C# while doing the same functionality

Do we have any operator in C# by which I can avoid short circuit evaluation and traverse to all the ... according to result obtained. ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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565 views

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operators - What does the '!!!' syntax mean in javascript?

I just came across the following line of code in one of the Windows Store Apps samples. if (that.assets[asset]. ... what the !!! syntax means? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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556 views

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operators - what is the use of ... in c++

I tried googling ... but as expected, google ignored it. I have this code : try { // some code } catch( ... right ? any other usages for this ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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563 views

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operators - Behaviour of && in C programming language

I am beginner in C programming language, recently I have read about Logical AND && operator. I also know ... about the precedence of operators. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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677 views

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operators - PHP functions and @functions

Basically, I've seen people using @ before their function calls, not for every function, but for some ... () and file_get_contents()? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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418 views

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operators - Why do I have to use a * in front of a Perl bareword filehandle?

While trying to do this: my $obj = new JavaScript::Minifier; $obj->minify(*STDIN, *STDOUT); // modified ... or any other datatype. Thanks, See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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544 views

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operators - What is the difference between "||" and "or" in Perl?

What is the difference between the C-style operators &&, ||, ... and their Perl human-readable version "and", " ... || die("cannot open $file"); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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607 views

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operators - Why do these snippets of JavaScript behave differently even though they both encounter an error?

var a = {} var b = {} try{ a.x.y = b.e = 1 // Uncaught TypeError: Cannot set property 'y' of undefined } ... (err); } console.log(b.e) // 1 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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548 views

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operators - How to calculate percentages in LESS CSS?

I would like to calculate the width of child-container (div etc) in percentages depending on the parent ... Any hints greatly appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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487 views

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operators - Why is === faster than == in PHP?

Why is === faster than == in PHP? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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485 views

1 answer

operators - How does Python implement the modulo operation?

I'm curious in regards to the time and space complexities of the % operator in Python. Also, does Python use ... slightly from that of Python 3 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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865 views

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operators - Difference between += and =+ in C++

While programming in C++, I often confuse both "+=" and "=+", the former being the operator I actually mean. Visual ... , but what does "=+" do? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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540 views

1 answer

operators - ' vs " " vs ' ' ' in Groovy .When to Use What?

I am getting really confused in Groovy. When to use what for Strings in Groovy ? 1) Single Quotes - ' ' 2) ... same results. When to Use What ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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698 views

1 answer

operators - Use of caret symbol( ^ ) in Ruby

1 ^ 1 # => 0 1 ^ 2 # => 3 5 ^ 6 # => 3 These are the results I am getting. Can, please, somebody explain how ^ works? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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373 views

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operators - Why is 'print (52-80)*42' different than 'print 42*(52-80)' in Perl?

Perl:: What is: 1. (52-80)*42 2. 42*(52-80) Ans: 1. -28 2. -1176 Why? Have fun explaining/justifying this ... Output: > -1176 > -1176-28 > -1176 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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400 views

1 answer

operators - Is there an Non-Short circuited logical "and" in C++?

tl;dr: Is there a non-short circuit logical AND in C++ (similar to &&)? I've got 2 functions that I want to ... in the C++ standard to do it. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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417 views

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operators - How does the ? make a quantifier lazy in regex

I've been looking into regex lately and figured that the ? operator makes the *,+, or ? lazy. My ... m desperate to understand.Many thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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532 views

1 answer

operators - What are XAND and XOR

What are XAND and XOR? Also is there an XNot See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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516 views

1 answer

operators - What does << mean in Java?

I can't find out what << means in Java because I can't search for it on Google - I am ... really appreciate someone telling me, thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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637 views

1 answer

operators - Need help understanding "getbits()" method in Chapter 2 of K&R C

In chapter 2, the section on bitwise operators (section 2.9), I'm having trouble understanding how one of the ... a binary view!) Any help? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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460 views

1 answer

operators - What does ":=" do?

I've seen := used in several code samples, but never with an accompanying explanation. It's not exactly possible to ... it. What does it do? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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803 views

1 answer

operators - What is the equivalent to += in Matlab?

Is it possible in Matlab to increment a value of a variable without restating it on the right hand side of the statement? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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420 views

1 answer

operators - Why [] == [] is false in JavaScript?

I am working on a part of the code where I have an array which looks like [[data]]. The data is ... well. Any descriptions would be appreciated. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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538 views

1 answer

operators - How can I round to whole numbers in JavaScript?

I have the following code to calculate a certain percentage: var x = 6.5; var total; total = x/15*100; / ... there way to do this in JavaScript? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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451 views

1 answer

operators - Why does the expression a = a + b - ( b = a ) give a sequence point warning in c++?

Following is the test code: int main() { int a = 3; int b = 4; a = a + b - (b = a); cout ... 't see any sequence-point rule being violated here. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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604 views

1 answer

operators - R: += (plus equals) and ++ (plus plus) equivalent from c++/c#/java, etc.?

Does R have a concept of += (plus equals) or ++ (plus plus) as c++/c#/others do? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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