character

问题 I have a function that takes input as the column name of dataframe as columnname~1 . The dataframe consists of about 50 columns in which I want to repeat the process, I can use a for loop to generate column name as a character which unfortunately the function does not recognize. The difference is just M1~1 (works) vs "M1"~1 Any suggestions are welcome 回答1: Try: as.formula(paste("M1","1",sep="~")) 回答2: Use the "[[ function? datafrm[[M1]] ~ 1 That function will interpret the character value and

问题 This may be a stupid question but its not a matter of what I can find, its a matter that I dont know what to search for. There are some special characters that don't show correctly in php. I'm taking some information from an xml file, and echo-ing them. ie: should be -> Nürnberg echoes as -> Nürnberg any tips on what to look for, or how to resolve this? 回答1: <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> 回答2: You simply have an encoding mismatch . Get up to speed with

问题 Is there any way to delete the first character in a text file once you read it? I want the program to read the character in from the text file and once it is used it should delete that current character that was read from the text file. 回答1: you can't delete characters from file,you can modify them and logically says that data was deleted. we can't remove file content. instead of deleting you can add * (or any thing that is not there in your file) at the position where you want to delete char

问题 This question already has answers here : scanf() leaves the new line char in the buffer (4 answers) Closed 12 months ago . For some reason scanf reads the character but the program doesn't continue past the while loop used to validate the character even though the character is valid. Sometimes it works and other times it doesn't. The weird thing is I don't do anything different. Any ideas? do { printf("Enter \"p\" if you want to sort and shuffle a list of players or enter \"s\" if you want to

问题 I have a simple HTML Form that allows the user to enter some text which is then sent as an SMS/TXT Message via an SMS Gateway. The user enters the message text into a textarea: <textarea rows="10" cols="40" id="smsbody" validate = "required:true" name="MessageBody"></textarea> They can enter as little or as much text as they like, however as each SMS is limited to 160 characters I would like to display a character counter that shows both the number of characters entered and then also

问题 What is the \b equivalent in swift? I have to split a string which is received from server with \b ? 回答1: From "Strings and Characters" in the Swift Reference: Special Characters in String Literals String literals can include the following special characters: The escaped special characters \0 (null character), \\ (backslash), \t (horizontal tab), \n (line feed), \r (carriage return), \" (double quote) and \' (single quote) An arbitrary Unicode scalar, written as \u{n} , where n is a 1–8 digit

问题 I'm able to separate the words in the sentence but I do not know how to check if a word contains a character other than a letter. You don't have to post an answer just some material I could read to help me. public static void main(String args []) { String sentance; String word; int index = 1; System.out.println("Enter sentance please"); sentance = EasyIn.getString(); String[] words = sentance.split(" "); for ( String ss : words ) { System.out.println("Word " + index + " is " + ss); index++; }

问题 Hy everyone, so I wrote some code that should count characters that are typed in console by user, using getchar() and a while loop until EOF character is typed, but it adds more to the count variable that it should. For example, I enter 3 characters, and then EOF character(in this case 'z') and at the end It outputs that I entered 6 characters, if I enter 4 chars + 'z' it says 8, if 5 it says 10. It displays x2 number of charaters it should. #include <stdio.h> #define END 'z' int main() {

问题 I'm trying to automate some of the systems at work here specifically to do with report generation based on survey data. Lets say i have 3 comments for 1 question. current_comments <- c("too slow", "not fast enough", "bad speed") Basically what i want to do is merge the comments into one string separated by a "-" too look like this >current_comments [1] "too slow - not fast enough - bad speed" So that i can stick it into one cell for exporting. I know that i can do this by using the paste

问题 I'm looking for a table or heuristic library that can convert extended characters like the o with the hat above it to a regular ascii o. I'm looking to do this for search indexing purposes since most people are not going to type the o with the hat. For example I type "Cote" into the search but I want my search to include things like "Côte". It appears Solr does not convert these. I tried java.text.Normalizer and friends but that did not work. did work see solution below. 回答1: You want to use