repeat

问题 I have the following url: example.com/hellllllllllo And I was looking for a way to avoid repeated characters up to double. Inspired by this question/answers Remove Characters from URL with htaccess I have created the following htaccess document to avoid repeated characters. If the character is repeated more than 23 times the url is not completely rewrited and I was wondering if there is any possible improvment? RewriteCond %{REQUEST_METHOD} !=POST RewriteCond %{REQUEST_URI} ^(.*)l{3,}(.*)$

问题 import java.util.Scanner; public class MyFirstGame { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.println("Please Enter A Number: "); double s = scanner.nextDouble(); double randomNumber = Math.random(); double realNumber = randomNumber*10; double realerNumber = Math.round(realNumber); System.out.println(realerNumber); if(s==realerNumber) { System.out.println("You Win!"); } else { System.out.println("Try Again..."); } } } So what I am trying to

问题 import java.util.Scanner; public class MyFirstGame { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.println("Please Enter A Number: "); double s = scanner.nextDouble(); double randomNumber = Math.random(); double realNumber = randomNumber*10; double realerNumber = Math.round(realNumber); System.out.println(realerNumber); if(s==realerNumber) { System.out.println("You Win!"); } else { System.out.println("Try Again..."); } } } So what I am trying to

问题 In Perl I can repeat a character multiple times using the syntax: $a = "a" x 10; // results in "aaaaaaaaaa" Is there a simple way to accomplish this in Javascript? I can obviously use a function, but I was wondering if there was any built in approach, or some other clever technique. 回答1: These days, the repeat string method is implemented almost everywhere. (It is not in Internet Explorer.) So unless you need to support older browsers, you can simply write: "a".repeat(10) Before repeat , we

问题 I have code that makes a folder and places output files in it. I want to use a try-except-else block and an overwrite option, which can be set to True or False, so that in the case where the folder already exists and overwrite is set to false it will just print that the folder already exists, and in all other cases it will just execute without comment. The only solution I've come up with so far looks like this: def function( parameters, overwrite = False ): try: os.makedirs( dir ) except

问题 i have a question about sql query. i want to duplicate a one row with same value, The number of lines must be same with the value of quantity example i have 1 data like this Item ItemName Quantity B100 Mouse 10 but i want to be like this Item ItemName Quantity B100 Mouse 10 B100 Mouse 10 B100 Mouse 10 B100 Mouse 10 B100 Mouse 10 B100 Mouse 10 B100 Mouse 10 B100 Mouse 10 B100 Mouse 10 B100 Mouse 10 can you help me Thanks Before 回答1: Create a numbers table and just do a CROSS JOIN with it

问题 I would like to give a sequence of numbers to a new column to a data frame. But this sequence will repeat several times based on a value in another column. (i.e It starts from 1 until that specific value will be changed to other value). My problem is how to define the ending point for each sequence in r. A part of my data frame with the column "V2" which I intend to add: V1 V2(new added column with sequential numbers) 12 1 12 2 12 3 12 4 12 5 13 1 13 2 13 3 13 4 13 5 13 6 14 1 14 2 14 3 14 4

问题 I would like to give a sequence of numbers to a new column to a data frame. But this sequence will repeat several times based on a value in another column. (i.e It starts from 1 until that specific value will be changed to other value). My problem is how to define the ending point for each sequence in r. A part of my data frame with the column "V2" which I intend to add: V1 V2(new added column with sequential numbers) 12 1 12 2 12 3 12 4 12 5 13 1 13 2 13 3 13 4 13 5 13 6 14 1 14 2 14 3 14 4

问题 I'm using Vim's surround and repeat plugins to wrap lines of text with html tags. I'll use "yse<p>" and "ys$<p>", they both work fine. I try to repeat the command with ".", and it shows <p> in the terminal, but whenever I press enter to execute the command, surround replaces what should be <p> and </p> with ^M. My line looks like ^Mtext here^M I recognize the character as a line ending, but I don't understand why surround won't wrap my line with the code it shows in the terminal (which is

问题 (Python) I have the following array x=[1,2,3,4,5,6] and I want this one x=[[1,2],[2,3],[3,4],[4,5],[5,6]] I used this function def split(arr, size): arrs = [] while len(arr) > size: pice = arr[:size] arrs.append(pice) arr = arr[size:] arrs.append(arr) return arrs But it only generates this x=[[1,2],[3,4],[5,6]] 回答1: I suppose you want to develop your own code and not use libraries or built-in functions. Your code is fine. There's just one simple mistake: change the slice index from size to 1