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Swift - How to convert String to Double

I'm trying to write a BMI program in swift language. And I got this problem: how to convert a String to a Double? 29 Answer...
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Finding the type of an object in C++

I have a class A and another class that inherits from it, B. I am overriding a function that accepts an object of type A as a parameter, so I have to accept an A. However, I later call functions that only B has, so I want to return false and not proceed if the object passed is not of type B. ...
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How to run a method every X seconds

I'm developing an Android 2.3.3 application and I need to run a method every X seconds . 8 Answers ...
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angularjs directive call function specified in attribute and pass an argument to it

I want to create a directive that links to an attribute. The attribute specifies the function that should be called on the scope. But I also want to pass an argument to the function that is determined inside the link function. ...
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How can you profile a Python script?

Project Euler and other coding contests often have a maximum time to run or people boast of how fast their particular solution runs. With Python, sometimes the approaches are somewhat kludgey - i.e., adding timing code to __main__ . ...
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What is the difference between 'typedef' and 'using' in C++11?

I know that in C++11 we can now use using to write type alias, like typedef s: 7 Answers ...
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/bin/sh: pushd: not found

I am doing the following inside a make file 11 Answers 11 ...
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Does hosts file exist on the iPhone? How to change it? [closed]

I am developing an application that query to the server. In my Mac, I use the hosts file to change the dns to point to a local server within my local area network. ...
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How do I format a date with Dart?

I have an instance of DateTime and I would like to format that to a String. How do I do that? I want to turn the date into a string, something like "2013-04-20". ...
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Using Python 3 in virtualenv

Using virtualenv , I run my projects with the default version of Python (2.7). On one project, I need to use Python 3.4. ...