special-characters

问题 This is a really long-standing issue in my work, that I realize I still don't have a good solution to... C naively defined all of its character test functions for an int: int isspace(int ch); But char's are often signed, and a full character often doesn't fit in an int, or in any single storage-unit that used for strings******. And these functions have been the logical template for current C++ functions and methods, and have set the stage for the current standard library. In fact, they're

问题 I don't use unicode characters in my android-textview.How can I do this? my xml : <?xml version="1.0" encoding="utf-8"?> and I don't use unicode characters in android textview,edittext,.... 回答1: Summary of comment thread: Save .txt file containing şile as UTF-8. (For Notepad, best: UTF-8 without BOM.) Load from code using a new InputStreamReader(inputStream, "utf-8") . 来源： https://stackoverflow.com/questions/9108876/i-dont-use-unicode-characters-in-my-android-textview-how-can-i-do-this

问题 Given the following python script: # dedupe.py import re def dedupe_whitespace(s,spacechars='\t '): """Merge repeated whitespace characters. Example: >>> dedupe_whitespace(r"Green\t\tGround") # doctest: +REPORT_NDIFF 'Green\tGround' """ for w in spacechars: s = re.sub(r"("+w+"+)", w, s) return s The function works as intended within the python interpreter: $ python >>> import dedupe >>> dedupe.dedupe_whitespace('Purple\t\tHaze') 'Purple\tHaze' >>> print dedupe.dedupe_whitespace('Blue\t\tSky')

问题 I am developing a native app which consists of some mathematical formulas. Formulas will be like......... I want to display such formulas in my application, but i don't how to use these special characters in Android. I want to display each formula individually in a list view...... If i am copying formula & if i am setting text to text view means it is showing like txtv.setText("\\cos^2\\theta + \\sin^2\\theta = 1\\! "); and getting output in the same pattern. So, can anyone help me how to use

问题 I have the following piece of code which seems to be changing my character set. $html = "à"; echo $html; // result: à $html = preg_replace("/\s/", "", $html); echo $html; // result: ? However, when I use [\t\n\r\f\v] as my pattern instead of the special character \s it works fine: $html = "à"; echo $html; // result: à $html = preg_replace("/[\t\n\r\f\v]/", "", $html); echo $html; // result: à Why is that? 回答1: I have the same problem. It is because of UTF8. à is 0xc3a0 in UTF8. In PHP you can

问题 I generate a plot for multiple datasets. Each of the datasets should get it's own legend, which might contain greek letters, plotmath symbols or sub and superscrition. I'd like to generate the legend-texts in a loop. Bquote works fine, if there is only one legend text. If I try to add additinal legend texts, the plotmath-commads get lost,... x <- 0:10 y1 = x * x y2 = x * 10 plot (1,1, type="n", xlab=bquote(Omega), ylab="Y", las=1, xlim=range(x), ylim=range(y1, y2)) lines(x, y1, col=1, pch=1,

问题 I want to remove all special characters from a string. Allowed characters are A-Z (uppercase or lowercase), numbers (0-9), underscore (_), white space ( ), pecentage(%) or the dot sign (.). I have tried this: StringBuilder sb = new StringBuilder(); foreach (char c in input) { if ((c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') | c == '.' || c == '_' || c == ' ' || c == '%') { sb.Append(c); } } return sb.ToString(); And this: Regex r = new Regex("(?:[^a-z0-9% ]|(?<=[

问题 I'm using regex to validate username ^[a-zA-Z]+\.[a-zA-Z]{4,10}^' Unfortunately it doesn't affect if the the value contains special characters such as !@#$%^&*)(':; I would glad to get some help for Regex that contains: Alphanumeric only ( a-zA-Z0-9 ) Length between 4 - 10 characters. 回答1: The conditions you specified do not conform to the regexp you posted. the regexp you posted ^[a-zA-Z]+\.[a-zA-Z]{4,10}^ is erroneous I guess, because of the ^ in the end, it will never be matched to any

问题 This question already has answers here : preg_match special characters (6 answers) Closed 2 years ago . I am using pspell to spell check some words. However if the word is something like G3523B it clearly is not a misspelled word but pspell changes it to GB. I would like somehow to qualify a word as a word before trying to spell check it. Maybe checking to see if the string contains any numbers or special characters. So what is the best way to check a string for special chars or digits? (if

问题 I ran into a new problem that I've never seen before: My client is adding files to a project we built and some of the filenames have special characters in them because some of the words are spanish. For example a file I'm testing has an á in it. I am calling that image in a css file as a background image but in Safari it doesnt show up. But it does on FF and Chrome. As a test I pasted the link into the browser and the same thing. Works on FF and Chrome but Safari throws an error. So the