Recent questions tagged operators

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operators - What do ">>" and "<<" mean in Javascript?

I have a piece of Javascript code I'm trying to understand // read big-endian (network byte order) 32-bit float ... (like '<' or '>') See Question&Answers more detail:os...

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

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4.0k views

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operators - What does =+ mean in C?

I came across =+ as opposed to the standard += today in some C code; I'm not quite sure what's going ... couldn't find it in the documentation. See Question&Answers more detail:os...

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

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524 views

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operators - What good are right-associative methods in Scala?

I've just started playing around with Scala, and I just learned about how methods can be made right-associative (as ... it's a fair comparison. See Question&Answers more detail:os...

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

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1.3k views

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operators - What are the ?? double question marks in Dart?

The following line of code has two question marks: final myStringList = prefs.getStringList('my_string_list_key') ?? []; What is the meaning? See Question&Answers more detail:os...

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

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471 views

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operators - Not equal to != and !== in PHP

I've always done this: if ($foo !== $bar) But I realized that if ($foo != $bar) is correct too. Double = ... to != just for the sake of 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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984 views

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operators - What's the difference between ++$i and $i++ in PHP?

What's the difference between ++$i and $i++ in PHP? Question&Answers:os...

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

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590 views

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operators - Overriding "+=" in Python? (__iadd__() method)

Is it possible to override += in Python? Question&Answers:os...

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

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574 views

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operators - Difference between & and && in Java?

This question already has answers here: Question&Answers:os...

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

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523 views

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operators - What exactly does += do in python?

I need to know what += does in Python. It's that simple. I also would appreciate links to definitions of other shorthand tools in Python. Question&Answers:os...

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

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624 views

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operators - What does the question mark character ('?') mean in C++?

int qempty() { return (f == r ? 1 : 0); } In the above snippet, what does "?" mean? What can we replace it with? Question&Answers:os...

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

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447 views

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operators - Use of "instanceof" in Java

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

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533 views

1 answer

operators - Python != operation vs "is not"

In a comment on this question, I saw a statement that recommended using result is not None vs result != None ... why one might be recommended over the other? Question&Answers:os...

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

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770 views

1 answer

operators - What does the percentage sign mean in Python

In the tutorial there is an example for finding prime numbers: >>> for n in range(2, 10): ... for x in range ... sign falls in. What does if n % x actually say? Question&Answers:os...

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

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557 views

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operators - javascript i++ vs ++i

This question already has answers here: Question&Answers:os...

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

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577 views

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operators - Short-circuit evaluation on C

I'm studying C from A Book on C by Kelley-Pohl, and there's this exercise that I don't understand: int a = 0, b = 0, x ... 777 0 778 778 1 but it is 0 0 0 0 0 1 Question&Answers:os...

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

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538 views

1 answer

operators - What does = +_ mean in JavaScript

I was wondering what the = +_ operator means in JavaScript. It looks like it does assignments. Example: hexbin.radius = ... = r * 1.5; return hexbin; }; Question&Answers:os...

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

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758 views

1 answer

operators - What is the difference between & and && in Java?

I always thought that && operator in Java is used for verifying whether both its boolean operands are true, and ... Or is there some other concept behind this? Question&Answers:os...

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

0 votes

614 views

1 answer

operators - Difference between "and" and && in Ruby?

What is the difference between the && and and operators in Ruby? Question&Answers:os...

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

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575 views

1 answer

operators - Difference between "or" and || in Ruby?

This question already has answers here: Question&Answers:os...

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

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490 views

1 answer

operators - When is "i += x" different from "i = i + x" in Python?

I was told that += can have different effects than the standard notation of i = i +. Is there a case in which i += 1 would be different from i = i + 1? Question&Answers:os...

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

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543 views

1 answer

operators - What is the use of the @ symbol in PHP?

I have seen uses of @ in front of certain functions, like the following: $fileHandle = @fopen($fileName, $writeAttributes); What is the use of this symbol? Question&Answers:os...

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

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836 views

1 answer

operators - What does ||= (or-equals) mean in Ruby?

What does the following code mean in Ruby? ||= Does it have any meaning or reason for the syntax? Question&Answers:os...

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

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450 views

1 answer

operators - How to visually print letters in the console in C#?

Closed. This question needs details or clarity. It is not currently accepting answers. question from:https://stackoverflow. ... /how-to-visually-print-letters-in-the-console-in-c...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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459 views

1 answer

operators - Two logically identical C instructions give different results

EDIT: The answer is, bitwise operations on signed values does weird things! During a debugging process, ... /65892253/two-logically-identical-c-instructions-give-different-results...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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607 views

1 answer

operators - What does the percent sign mean in PHP?

What exactly does this mean? $number = ( 3 - 2 + 7 ) % 7; question from:https://stackoverflow.com/questions/1934173/what-does-the-percent-sign-mean-in-php...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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449 views

1 answer

operators - What is <-- in Java?

(This question already has answers here): question from:https://stackoverflow.com/questions/25722718/what-is-in-java...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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466 views

1 answer

operators - What is <-- in Java?

(This question already has answers here): question from:https://stackoverflow.com/questions/25722718/what-is-in-java...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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679 views

1 answer

operators - How do I print the percent sign(%) in c

(This question already has answers here): question from:https://stackoverflow.com/questions/17774821/how-do-i-print-the-percent-sign-in-c...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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