lowercase

问题 In a web application, how do I determine whether the first letter in a given string is upper- or lower-case using JavaScript? 回答1: You can use toUpperCase : if(yourString.charAt(0) === yourString.charAt(0).toUpperCase()) { //Uppercase! } If you're going to be using this on a regular basis, I would suggest putting it in a function on the String prototype, something like this: String.prototype.isFirstCapital = function() { return this.charAt(0) === this.charAt(0).toUpperCase(); } if(yourString

问题 int main() { string s; cout << "enter the string :" << endl; cin >> s; for (int i = 0; i < s.length(); i++) s[i] ^= 32; cout << "modified string is : " << s << endl; return 0; } I saw this code which converts uppercase to lowercase on stackoverflow. But I don't understand the line s[i] = s[i]^32 . How does it work? 回答1: ^= is the exclusive-or assignment operator. 32 is 100000 in binary, so ^= 32 switches the fifth bit in the destination. In ASCII, lower and upper case letters are 32 positions

问题 I was wondering why people don't use uppercase in name of header files. I see many header files with name only in lowercase. But I thought it would be more easy to read if they write them with uppercase, say "BaseClass.h", "SubClass.h", instead of "baseclass.h", "subclass.h". Why is that? Or it's just that the header files I've seen are named only in lowercase? 回答1: There are systems out there which are case-sensitive (*nix), and there are systems which are traditionally case-insensitive

问题 This question already has answers here : How to lowercase a pandas dataframe string column if it has missing values? (8 answers) Closed 7 months ago . I have a data that contains domain names: url var1 www.CNN.com xsd www.Nbc.com wer www.BBc.com xyz www.fOX.com zyx .... The data is of the Series type. I am using the following to convert url variable to lower case: df.apply(lambda x: x.astype(str).str.lower()) However, they remain the same. What am I doing wrong? 回答1: df['url'] = df['url'].str

问题 I need help. I want to rename all files to lower case within a directory recursively. I have a code to test but it only rename within that folder not recursively. How can I make it to do it recursively. This is the code I use <?php $directory="/data"; $files = scandir($directory); foreach($files as $key=>$name){ $oldName = $name; $newName = strtolower($name); rename("$directory/$oldName","$directory/$newName"); } ?> 回答1: You can use the SPL's RecursiveDirectoryIterator for that. <?php $path =

问题 Alternately display any text that is typed in the textbox // in either Capital or lowercase depending on the original // letter changed. For example: CoMpUtEr will convert to // cOmPuTeR and vice versa. Switch.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e ) String characters = (SecondTextField.getText()); //String to read the user input int length = characters.length(); //change the string characters to length for(int i = 0; i < length; i++) //to check the

问题 i would like to know if it's possible check if one letter of a string is capitalized. Other way to see it, if all letters in the string are uppercase or lowercase. Example: string a = "aaaaAaa"; string b = "AAAAAa"; if(??){ //Cheking if all the string is lowercase cout << "The string a contain a uppercase letter" << endl; } if(??){ //Checking if all the string is uppercase cout << "The string b contain a lowercase letter" << endl; } 回答1: you can use standard algorithm std::all_of if( std::all

问题 I'm doing a filter wherein I check if a unicode (utf-8 encoding) string contains no uppercase characters (in all languages). It's fine with me if the string doesn't contain any cased character at all. For example: 'Hello!' will not pass the filter, but "!" should pass the filter, since "!" is not a cased character. I planned to use the islower() method, but in the example above, "!".islower() will return False. According to the Python Docs, "The python unicode method islower() returns True if

问题 This question already has answers here : How to test multiple variables against a value? (24 answers) Closed 5 years ago . ((In response to the above edit, this was not answered in the above link. The above question is irrelevant to my intended use.)) I have read a similar question about turning a string into lowercase; How to convert string to lowercase in Python I understand how this works perfectly, however my attempts at this myself have failed. Here's my current setup example for a debug

问题 I got a string like: var str = new Array( "Inverted HFFSfor Primary Wrap Or Secondary Multi Wrap", "HFFSwith PDSPbackgroud Feederlense & Product Alignerigit", "HFFSwith Cooler JKLHbetween Feeder & Product Aligner") How to separate i.e. 1) HFFSfor to become HFFS for 2) HFFSwith to become HFFS with 3) PDSPbackgroud to become PDSP backgroud 4) JKLHbetween to become JKLH between and so forth... My first instinc was something like: for(var i = 0; i<_str.length; i++){ if( (/*The needed Regex*/)