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Replace all non-alphanumeric characters in a string

I have a string with which i want to replace any character that isn't a standard character or number such as (a-z or 0-9) with an asterisk. For example, "h^&ell`.,|o w]{+orld" is replaced with "h*ell*o*w*orld". Note that multiple characters such as "^&" get replaced with one asterisk. How would I go...
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Substitute multiple whitespace with single whitespace in Python [duplicate]

I have this string: 3 Answers 3 ...
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Python dictionary: Get list of values for list of keys

Is there a built-in/quick way to use a list of keys to a dictionary to get a list of corresponding items? 11 Answers ...
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How do I get the MAX row with a GROUP BY in LINQ query?

I am looking for a way in LINQ to match the follow SQL Query. 6 Answers 6 ...
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How to update PATH variable permanently from Windows command line?

If I execute set PATH=%PATH%;C:\\Something\\bin from the command line ( cmd.exe ) and then execute echo %PATH% I see this string added to the PATH. If I close and open the command line, that new string is not in PATH. ...
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Pad a number with leading zeros in JavaScript [duplicate]

In JavaScript, I need to have padding. 9 Answers 9 ...
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Capitalize first letter. MySQL

Does any one know the equivalent to this TSQL in MySQL parlance? 13 Answers 13 ...
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How to escape JSON string?

Are there any classes/functions available to be used for easy JSON escaping? I'd rather not have to write my own. 14 Answer...
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What does ^M character mean in Vim?

I keep getting ^M character in my vimrc and it breaks my configuration. 15 Answers ...
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Repeat String - Javascript

What is the best or most concise method for returning a string repeated an arbitrary amount of times? 30 Answers ...