trim

问题 I have a file in the csv format with a first column of data that represents item code optionally ended with "UNIUNI" or mixed case of these chars, loaded by means of a barcode reader. I need to trim away the last "UNI" s. In Rust I tried to write with partial success a function essentially like this: fn main() { // Ok: from "9846UNIUNI" to "9846" println!("{}", read_csv_rilev("9846UNIUNI".to_string())); // Wrong: from "9846uniuni" to "9846" println!("{}", read_csv_rilev("9846uniuni".to_string

问题 In a C# string if we want to replace " " in a string to string.empty , is it fine to use stringValue.Trim() or stringValue.replace(" ", string.empty) . Both serve the same purpose. But which one is better? 回答1: Trim() and Replace() do not serve the same purpose. Trim() removes all whitespace characters from the beginning and end of the string. That means spaces , tabs , new lines , returns , and other assorted whitespace characters . Replace() only replaces the designated characters with the

问题 I can use the MySQL TRIM() method to cleanup fields containing leading or trailing whitespace with an UPDATE like so: UPDATE Foo SET field = TRIM(field); I would like to actually see the fields this will impact before this is run. I tried this but returns 0 results: SELECT * FROM Foo WHERE field != TRIM(field); Seems like this should work but it does not. Anyone have a solution? Also, curious why this does not work... 回答1: As documented under The CHAR and VARCHAR Types: All MySQL collations

问题 there are lots of scripts out there to trim a string in javascript, but none how to Left Trim String. This is what I use to trim: String.prototype.trim = function() { return this.replace(/^\s+|\s+$/g,""); } But I would like to change this a little and create a new function called leftTrim that only removes the leading space. My regex is pretty limited, so any help is much appreciated. Cheers 回答1: Use: String.prototype.leftTrim = function() { return this.replace(/^\s+/,""); } In the regex the:

问题 I use WinForms c#.I have string value like below, string Something = "1,5,12,34,"; I need to remove last comma in a string. So How can i delete it ? 回答1: Try string.TrimEnd() : Something = Something.TrimEnd(','); 回答2: King King's answer is of course right. Also Tim Schmelter's comment is also good suggestion in your case. But if you want really remove last comma in a string , you should find the index of last comma and remove like; string s = "1,5,12,34,12345"; int index = s.LastIndexOf(',');

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 . I learned string.trim() removes leading and trailing spaces. But in my case its not working i am trying below code but output is with leading and trailing space. But my expectation is text without leading and trailing space. Here is my code. String s = " Hello Rais "; s += " Welcome to my World "; s.trim( );

问题 I get data from a textarea where a user has to enter a name one on each line. That data later gets split at the carriage return. Sometimes a user may add blank lines intentionally. How can I detect these lines and delete them? I'm using PHP. I dont mind using a regexp or anything else. Incorrect Data Matthew Mark Luke John James Correct Data (Note blank lines removed) Matthew Mark Luke John James 回答1: Using regex to eliminate blank lines before exploding (works well for any number of

问题 In SQL Server 2017, you can use this syntax, but not in earlier versions: SELECT Name = TRIM(Name) FROM dbo.Customer; 回答1: SELECT LTRIM(RTRIM(Names)) AS Names FROM Customer 回答2: To Trim on the right, use: SELECT RTRIM(Names) FROM Customer To Trim on the left, use: SELECT LTRIM(Names) FROM Customer To Trim on the both sides, use: SELECT LTRIM(RTRIM(Names)) FROM Customer 回答3: I assume this is a one-off data scrubbing exercise. Once done, ensure you add database constraints to prevent bad data

问题 For example, I would like to create an array from the elements in this string: $str = 'red, green, blue ,orange'; I know you can explode and loop through them and trim: $arr = explode(',', $str); foreach ($arr as $value) { $new_arr[] = trim($value); } But I feel like there's a one line approach that can handle this. Any ideas? 回答1: You can do the following using array_map: $new_arr = array_map('trim', explode(',', $str)); 回答2: An Improved answer preg_split ('/(\s*,*\s*)*,+(\s*,*\s*)*/', 'red,

问题 Edit : Thanks to R Yoda , I was finally able to create a reproducible example to the issue I am facing: x = rawToChar(as.raw(c(0xa0, 0x31, 0x31, 0x2e, 0x31, 0x33, 0x32, 0x35, 0x39, 0x32))) trimws(x) => Question: How can I trim x? Old text of the question: Please see attached screenshot. Unfortunately I am not able to create reproducible example as dput is affecting the result... As anyone an idea how to investigate what's going wrong with x? The leading whitespace doesn't seem to be a