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Javascript regex returning true.. then false.. then true.. etc [duplicate]
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/^[^-_]([a-z0-9-_]{4,20})[^-_]$/gi;
You're using a g (global) RegExp. In JavaScript, global regexen have state: you call them (with exec, test etc.) the first time, you get the first match in a given string. Call them again and ...				
				
				
							Proper way to use AJAX Post in jquery to pass model from strongly typed MVC3 view
					...         Nothing glaring stands out as a security issue to me. If you're really concerned about it though, you can always make a custom model binder on the mvc side.
                
– Craig M
                May 12 '11 at 18:31
            
        
    
    
        
            
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							How to concatenate strings in django templates?
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                I was totally confused by this answer as it uses the include tag instead of the extend tag, but apparently it just works. Though I would recommend Ahsan's own answer as it also workes and is (in my opinion) semantically more correct a...				
				
				
							Why does printf not flush after the call unless a newline is in the format string?
					Why does  printf  not flush after the call unless a newline is in the format string? Is this POSIX behavior? How might I have  printf  immediately flush every time?
                    
                    
                        
                            
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							Is there a RegExp.escape function in Javascript?
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                actually, we don't need to escape / at all
                
– thorn̈
                Feb 14 '13 at 20:53
            
        
    
    
        
            
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							How to delete a character from a string using Python
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                M might not be unique. In that case, this will replace all the Ms, right?
                
– Lazer
                Aug 24 '10 at 18:21
            
        
    
    
        
            
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							android get real path by Uri.getPath()
					I'm trying to get image from gallery. 
                    
                    
                        
                            
                                
                                        7 Answers
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							Suppressing “warning CS4014: Because this call is not awaited, execution of the current method conti
					This is not a duplicate of  "How to safely call an async method in C# without await" .
                    
                    
                        
                            
                                
                                        8 Answers
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							How to write inline if statement for print?
					... condition:
    block
if expression (introduced in Python 2.5)
expression_if_true if condition else expression_if_false
And note, that both print a and b = a are statements. Only the a part is an expression. So if you write
print a if b else 0
it means
print (a if b else 0)
and similarly ...				
				
				
							“Variable” variables in Javascript?
					...usly consider that). It is possible to access some global variables dynamically via window, but that doesn't work for variables local to a function. Global variables that do not become a property of window are variables defined with let and const, and classes.
There is almost always a better soluti...				
				
				
							