character

问题 How many characters can i store in 4kb when the characters are in utf-8 encoding ? 回答1: In UTF-8 characters need between 1 and 4 bytes. So, you can store between 4096 and 1024, respectively, UTF-8 characters in 4KB. I would assume that in many use cases you can expect that most characters fit into one byte and almost all into 2. 回答2: Here is a visual cue how much 1024 or 4096 are. Read @Jon Snyder's message to get a better understanding. 1024 Characters (Assuming Characters have 4 bytes):

问题 Are there any invisible characters? I have checked Google for invisible characters and ended up with many answers but I'm not sure about those. Can someone on Stack Overflow tell me more about this? Also I have checked a profile on Facebook and found that the user didn't have any name to his profile? How can this be possible? Is it some database issue? Hacking or something? When I searched over Internet, I found that 200D is an ASCII value with an invisible character. Is it true? 回答1: How a

问题 I've struggled and failed for over ten minutes here and I give in. I need to convert an Int to a Character in Swift and cannot solve it. Question How do you convert ( cast ) an Int ( integer ) to a Character ( char ) in Swift? Illustrative Problem/Task Challenge Generate a for loop which prints the letters 'A' through 'Z', e.g. something like this: for(var i:Int=0;i<26;i++) { //Important to note - I know print(Character('A' + i)); //this is horrendous syntax... } //just trying to illustrate!

问题 I have a VB script that reads the 11th line from a text file. However from that line I need to extract characters 48 through 53 and save it as a variable. After this is accomplished I would like to use that variable and use it in a web url. Example below: Contents of the szCPUSer.dat file look like this: The script I have reads the 10th line Const ForReading = 1 Set objFSO = CreateObject("Scripting.FileSystemObject") Set objTextFile = objFSO.OpenTextFile("szCPUSer.dat", ForReading) For i = 1

问题 how can i parse a string to remove all non english characters in php right now I want to remove things like სოფო ნი� Thanks :) 回答1: $str = preg_replace('/[^\00-\255]+/u', '', $str); 回答2: Your best option would be using iconv , which converts strings to requested character encoding. iconv('UTF-8', 'ASCII//TRANSLIT', $yourtext); with //translit you get a meaningful conversion to ASCII (e.g. ß -> ss). Using //IGNORE will strip non-ascii characters altogether. iconv('UTF-8', 'ASCII//IGNORE',

问题 What was the original historical use of the vertical tab character ( \v in the C language, ASCII 11)? Did it ever have a key on a keyboard? How did someone generate it? Is there any language or system still in use today where the vertical tab character does something interesting and useful? 回答1: Vertical tab was used to speed up printer vertical movement. Some printers used special tab belts with various tab spots. This helped align content on forms. VT to header space, fill in header, VT to

问题 Basic question. char new_str[]=""; char * newstr; If I have to concatenate some data into it or use string functions like strcat/substr/strcpy, what's the difference between the two? I understand I have to allocate memory to the char * approach (Line #2). I'm not really sure how though. And const char * and string literals are the same? I need to know more on this. Can someone point to some nice exhaustive content/material? 回答1: Please go through this article below: Also see in case of array

问题 This question already has answers here : What does % do in JavaScript? (9 answers) Closed 6 years ago . How can I use modulo operator (%) in calculation of numbers for JavaScript projects? 回答1: It's the remainder operator and is used to get the remainder after integer division. Lots of languages have it. For example: 10 % 3 // = 1 ; because 3 * 3 gets you 9, and 10 - 9 is 1. Apparently it is not the same as the modulo operator entirely. 回答2: That would be the modulo operator, which produces

问题 Hopefully someone can see what I'm doing wrong, but here's the story... My current site URL's are auto-generated by the ecommerce software from the product and category names, therefore if the product/category name includes a non-alphanumeric characer, this is encoded in the URL which is a pain. EG: mysite.com/Shop/Furniture-Set-Large-Table%2C-4-Chairs.html I am moving to a new ecommerce solution, which also autogenerates the URL's from the product name, but is clever enough to remove all non

问题 How do you concatenate characters in java? Concatenating strings would only require a + between the strings, but concatenating chars using + will change the value of the char into ascii and hence giving a numerical output. I want to do System.out.println(char1+char2+char3... and create a String word like this. I could do System.out.print(char1); System.out.print(char2); System.out.print(char3); But, this will only get me the characters in 1 line. I need it as a string. Any help would be