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JavaScript math, round to two decimal places [duplicate]

I have the following JavaScript syntax: 13 Answers 13 ...
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Output first 100 characters in a string

Can seem to find a substring function in python. 8 Answers 8 ...
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How do I get a value of datetime.today() in Python that is “timezone aware”?

I am trying to subtract one date value from the value of datetime.today() to calculate how long ago something was. But it complains: ...
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MySQL Cannot drop index needed in a foreign key constraint

I need to ALTER my existing database to add a column. Consequently I also want to update the UNIQUE field to encompass that new column. I'm trying to remove the current index but keep getting the error MySQL Cannot drop index needed in a foreign key constraint ...
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How do you set your pythonpath in an already-created virtualenv?

What file do I edit, and how? I created a virtual environment. 6 Answers 6 ...
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How to create a printable Twitter-Bootstrap page

I'm using Twitter-Bootstrap and I need to be able to print the page the way it looks on the browser. I'm able to print other pages made with Twitter-Bootstrap just fine but I can't seem to print my page that uses purely Twitter-Bootstrap. Am I missing a tag somewhere? ...
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Read file from line 2 or skip header row

How can I skip the header row and start reading a file from line2? 8 Answers 8 ...
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Is there a difference between copy initialization and direct initialization?

Suppose I have this function: 9 Answers 9 ...
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How do I add options to a DropDownList using jQuery?

As the question says, how do I add a new option to a DropDownList using jQuery? 12 Answers ...
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How do you add Boost libraries in CMakeLists.txt?

I need to add Boost libraries into my CMakeLists.txt. How do you do it or how do you add it? 7 Answers ...