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How to use a variable inside a regular expression?

...wise we must write "\\\\boundary" in the regex (four backslashes). Additionally, without '\r', \b' would not converted to a word boundary anymore but to a backspace! re.escape: Basically puts a backspace in front of any special character. Hence, if you expect a special character in TEXTO, you need...
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jQuery - Add ID instead of Class

...)); $('#container').attr('id', $(this).text()); $('.stretch_footer').attr('id', $(this).text()) $('#footer').attr('id', $(this).text()); }); }); So you are changing/overwriting the id of three elements and adding an id to one element. You can modify as per you needs... ...
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Find a value in an array of objects in Javascript [duplicate]

... also there is a tiny utility for this called super-array – patotoma Sep 24 '17 at 17:43 ...
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Aliases in Windows command prompt

...ommand dropbox research points to the same directory as research. As Rivenfall pointed out, it is a good idea to include a command that allows for convenient editing of the alias.cmd file. See alias above. If you are in a cmd session, enter cmd to restart cmd and reload the alias.cmd file. When ...
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leading zeros in rails

...using a given padding character. str.rjust(integer, padstr=' ') → new_str If integer is greater than the length of str, returns a new String of length integer with str right justified and padded with padstr; otherwise, returns str. some_int = 5 some_int.to_s.rjust(2, '0') # => '05' ...
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C# Events and Thread Safety

... The JIT isn't allowed to perform the optimization you're talking about in the first part, because of the condition. I know this was raised as a spectre a while ago, but it's not valid. (I checked it with either Joe Duffy or Vance Morrison ...
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How unique is UUID?

...om numbers. However, it seems to me that given enough time, it would eventually repeat it self, just by pure chance. Is there a better system or a pattern of some type to alleviate this issue? ...
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Check if Python Package is installed

What's a good way to check if a package is installed while within a Python script? I know it's easy from the interpreter, but I need to do it within a script. ...
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“R cannot be resolved to a variable”? [duplicate]

...nd, huh? :) If you can't get R.java to build in the first place, it's usually a typo or other problem in an XML layout file. Using a capital letter in your XML filenames will also cause that problem. If R.java does exist but variables in it aren't recognized by just one Java file, for instance, ...
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How to change current working directory using a batch file

...st like the commands themselves (CD = cd). I believe that is also true for all external Windows command-line utilities (like FINDSTR, SORT etc.) Third-party tools, on the other hand, can use case-sensitive parameters. – Andriy M Feb 28 '17 at 13:36 ...