大约有 40,000 项符合查询结果(耗时:0.0457秒) [XML]
Regular expression to allow spaces between words
					I want a regular expression that prevents symbols and only allows letters and numbers. The regex below works great, but it doesn't allow for spaces between words.
                    
                    
                        
                            
                                
...				
				
				
							Private and Protected Members : C++
					...
        
    
    
Public members of a class A are accessible for all and everyone.
Protected members of a class A are not accessible outside of A's code, but is accessible from the code of any class derived from A.
Private members of a class A are not accessible outside of A's code, or f...				
				
				
							RE error: illegal byte sequence on Mac OS X
					...t a valid UTF-8 char.
Note that, by contrast, GNU sed (Linux, but also installable on macOS) simply passes the invalid byte through, without reporting an error.
Using the formerly accepted answer is an option if you don't mind losing support for your true locale (if you're on a US system and you ne...				
				
				
							target=“_blank” vs. target=“_new”
					...or window when the user clicks on the link.
Using target="_new" is technically invalid according to the specifications, but as far as I know every browser will behave the same way:
it will search for a tab or window with the context name "_new"
if a "_new" tab/window is found, then the URL is loa...				
				
				
							Android: How to bind spinner to custom object list?
					...ass)
        label.setText(values[position].getName());
        // And finally return your dynamic (or custom) view for each spinner item
        return label;
    }
    // And here is when the "chooser" is popped up
    // Normally is the same view, but you can customize it if you want
    @Overr...				
				
				
							Run an Application in GDB Until an Exception Occurs
					... a C++ exception.
catch
  The catching of a C++ exception.
exec
  A call to exec. This is currently only available for HP-UX.
fork
  A call to fork. This is currently only available for HP-UX.
vfork
  A call to vfork. This is currently only available for HP-UX.
load or load libname
  ...				
				
				
							Remove duplicates from an array of objects in JavaScript
					...) dot notation. Yours is ES5 syntax. The others are mostly ES6 (ECMA2015). All are valid in 2017. See jaredwilli's comment.
                
– agm1984
                Nov 15 '17 at 9:20
                        
                            
                        
            
        
 ...				
				
				
							What is your preferred style for naming variables in R? [closed]
					... 
Good previous answers so just a little to add here:
underscores are really annoying for ESS users; given that ESS is pretty widely used you won't see many underscores in code authored by ESS users (and that set includes a bunch of R Core as well as CRAN authors, excptions like Hadley notwithsta...				
				
				
							Cross-Origin Request Headers(CORS) with PHP headers
					...    
        
        
        
    
    
Access-Control-Allow-Headers does not allow * as accepted value, see the Mozilla Documentation here.
Instead of the asterisk, you should send the accepted headers (first X-Requested-With as the error says).
    
    
        
          ...				
				
				
							How to print a percentage value in python?
					... 
        
            
                
                Is float(1) really more pythonic than 1.?
                
– Tobias Kienzler
                Jul 17 '13 at 7:58
            
        
    
    
        
            
            
        
        
            
            ...				
				
				
							