Recent questions tagged If

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if statement - Can I have an IF block in DOS batch file?

In a DOS batch file we can only have 1 line if statement body? I think I found somewhere that I could use ... when I run the batch file. See Question&Answers more detail:os...

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

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if statement - Which is faster, try catch or if-else in java (WRT performance)

Which one is faster: Either this try { n.foo(); } catch(NullPointerException ex) { } or if (n != null) n.foo(); See Question&Answers more detail:os...

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

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if statement - MYSQL Sum Query with IF Condition

I am building a query for a report with multiple IF conditions on the SUM. I am having problems with a multiple ... , not broken down by day. See Question&Answers more detail:os...

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

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if statement - Issues with a if/else loop in Python

I am trying to make this Pig Latin translator in Python and it was working well until I tried to downsize it ... pyg_cons else: print 'empty' See Question&Answers more detail:os...

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

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if statement - PHP if single or double equals

For checking if one string matches another I've been using double equals sign up to now. e.g. if ( ... $string2) or if ($string1=$string2) See Question&Answers more detail:os...

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

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if statement - reader.ReadString does not strip out the first occurrence of delim

I wrote a simple go program and it isn't working as it should: package main import ( "bufio" "fmt" "os" ... !! Process finished with exit code 0 See Question&Answers more detail:os...

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

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if statement - Check if a variable is between two numbers with Java

I have a problem with this code: if (90 >>= angle =<< 180) The error explanation is: The left-hand ... turn the above code into correct code? See Question&Answers more detail:os...

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

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if statement - Why does (0 == 'Hello') return true in PHP?

Hey, if you have got the following code and want to check if $key matches Hello I've found out, that ... echoes hello Can anyone explain this? See Question&Answers more detail:os...

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

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if statement - Do all programming languages have boolean short-circuit evaluation?

In the PHP code if(a() && b()) when the first operand evaluates to false, b() will not be evaluated. Similarly, in if ... b()){ echo 'c'; } ?> See Question&Answers more detail:os...

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

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if statement - Dart null / false / empty checking: How to write this shorter?

This is my code for true on everything but empty string, null and false: if (routeinfo["no_route"] == "" || ... in Dart? Or is it not possible? See Question&Answers more detail:os...

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

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568 views

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if statement - jQuery: Test if checkbox is NOT checked

I'm having trouble figuring this out. I have two checkboxes (in the future will have more): checkSurfaceEnvironment-1 ... { // do something } See Question&Answers more detail:os...

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

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if statement - Python syntax for "if a or b or c but not all of them"

I have a python script that can receive either zero or three command line arguments. (Either it runs on default behavior or ... b or not a): ? See Question&Answers more detail:os...

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

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if statement - Bash comparison operator always true

I'm trying to write a small script to compare my external IP (first three bytes) with the one below: #!/ ... $IP_EX with whatever. Why is that? See Question&Answers more detail:os...

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

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if statement - Python if with many or in a contracted form

I'm learning python and I found myself lost trying to create a an if statement that should be true if the ... variable. Thank you in advance. See Question&Answers more detail: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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if statement - Compound condition in C: if (0.0 < a < 1.0)

I recently noticed that the following expression compiles in my compiler (Clang): float a; if (0.0 < a ... write conditions in this short form? See Question&Answers more detail:os...

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

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594 views

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if statement - VB6 IIf advantage

Is there a performance advantage to using IIf over If? Other than simply less code... what is the difference ... .Text), True, False) See Question&Answers more detail:os...

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

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if statement - How can a Java variable be different from itself?

I am wondering if this question can be solved in Java (I'm new to the language). This is the code: ... ) without modifying the condition itself? See Question&Answers more detail:os...

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

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if, elif, else statement issues in Bash

I can't seem to work out what the issue with the following if statement is in regards to the elif and then ... else echo "Unknown parameter" fi See Question&Answers more detail:os...

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

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507 views

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if statement - Type-juggling and (strict) greater/lesser-than comparisons in PHP

PHP is famous for its type-juggling. I must admit it puzzles me, and I'm having a hard time to find out ... was not really helpful in this case. See Question&Answers more detail:os...

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

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if statement - weird results with IF

Inspired by this question and it's answers, I did some testing. One answer suggests, the numbers are too big ... to live with without thinking? See Question&Answers more detail:os...

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

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829 views

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if statement - dplyr if_else() vs base R ifelse()

I am fairly proficient within the Tidyverse, but have always used ifelse() instead of dplyr if_else(). I want to ... this issue in the future. See Question&Answers more detail:os...

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

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588 views

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if statement - "elseif" syntax in JavaScript

How can I achieve an elseif in a JavaScript condition? See Question&Answers more detail:os...

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

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692 views

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if statement - Jquery condition check is(':hover') not working

$('.xx').mouseenter(function(){ if($(this).is(':hover')) alert('d'); else alert('f'); }); Here is ... time it alerts 'f' What's error 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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727 views

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if statement - MySQL: update a field only if condition is met

Is it possible to do an UPDATE query in MySQL which updates field value only if certain condition is met? Something ... proper way to do this? See Question&Answers more detail:os...

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

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708 views

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if statement - Who to » State if two are numbers Co-Primes A (8 bit ) and B (8 bit) ,State if A is T-Prime or not Using VHDL

Using VHDL who to ? State if two are numbers Co-Primes A (8 bit ) and B (8 bit) ,State if A is T-Prime or not...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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