increment

问题 I'm trying to create a script to count the number of hidden and non-hidden files in a folder where the script is run. However, I run into an issue where I cannot increment variables. #!/bin/bash #A simple script to count the number of hidden and non-hidden files in the folder this script is run in #Variables to store the number of hidden and non-hidden files and folders #Variables with a 'h' at the end represent hidden items files=0 fileh=0 #List all files and folders #Use grep to folder

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . In Java, Is the increment operator more efficient that a simple addition operation? 回答1: It compiles to the exact same byte code. It's all a matter of preference. EDIT : As it turns out this is NOT true. public class SO_Test { public static void main(String[] args) { int a = 1; a++; a += 1; ++a; } } Output:

问题 package practicejava; public class Query { public static void main(String[] args) { char ch = 66; System.out.println("character= " + ch); ch++; System.out.println("character = " + ch); } } Technically ch++; and ch=ch+1; are the same but why do I get an error when I write ch=ch+1; instead of ch++; ? 回答1: You need to provide a cast in order to do that : ch = (char) (ch + 1); This is because the expression ch + 1 is is promoted ( upcast ) to an int . In order for you to reassign this expression

问题 Is there a way to increment attribute values using n in nth-child(n) to output the result of: div:nth-child(1){ top: -5px; } div:nth-child(2){ top: -10px; } div:nth-child(3){ top: -15px; } div:nth-child(4){ top: -20px; } div:nth-child(5){ top: -25px; } 回答1: You could if you use a preprocessor like sass . An example: div { $var: 5; @for $i from 1 through 5 { &:nth-child(#{$i}) { top: -#{$var}px; $var: $var + 5; } } } A demo: http://sassmeister.com/gist/7d7a8ed86e857be02d1a Another way to

问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 6 years ago . The goal of this program is to make all numbers in an array the same. You have to increment all values in the array except for one each time. Then the

问题 I've got a weak imagination when it comes to names, so I often find myself re-using identifiers in my code. This caused me to run into this specific problem. Here's some example code: public delegate void TestDelegate(int test); public class Test { private int test; private void method(int aaa) { TestDelegate del = test => aaa++; test++; } public static void Main() { } } Here are the compilation errors (output by ideone): prog.cs(11,3): error CS0135: `test' conflicts with a declaration in a

问题 I am not sure what the title should be, but the code should explain it better: class Group { private $number = 20; public function __toString() { return "$this->number"; } } $number = new Group(); echo $number, PHP_EOL; echo ++ $number, PHP_EOL; echo PHP_EOL; $number = "20"; echo $number, PHP_EOL; echo ++ $number, PHP_EOL; echo PHP_EOL; $number = 20; echo $number, PHP_EOL; echo ++ $number, PHP_EOL; Output: 20 20 <--- Expected 21 20 21 20 21 Any idea why I got 20 instead of 21 ? Even then the

问题 I'm trying to browse through a picture gallery with jquery, so I have a button which is supposed to increment a variable by 1 and then use that to load the next picture. Using the top answer on this SO question, I thought this would be the solution: <div id="pic"></div> <div id="browse-right">NEXT</div> <%= image_tag("/1.JPG", id:"1") %> <%= image_tag("/2.JPG", id:"2") %> <%= image_tag("/3.JPG", id:"3") %> $("#1").click(function() { var x = 1; $("#pic").html('<img src="/' + x + '.JPG" />'); }

问题 have a question about CountDownTimer. I have to make an application that allows the user to increment the time time by +1, for every click of the button. Then after the button stops being clicked it waits for three seconds, then starts to countdown. I pasted my code below. My Issue is: I can't seem to get the Incrementing of the number working correctly, however it seems that after I stop Incrementing the number (onStop()) it directly goes to (onFinish()). Instead of going to the OnTick() and

问题 I am still very new to Python (3). I have a BUNCH of sensor data, but the download limit forces me to retrieve the data in chunks instead of all at once (each .zip file downloaded contains a folder of .csv files for each sensor's data during a given time period). Thus, I have dozens of large .csv files distributed among several folders that I would eventually like to concat/merge/append into one .csv file for each sensor's full data. To make things more complicated, .csv file names for each