convention

Related: What is the common header format of Python files? Where can I find a list of all double-underscore variables/keywords that are commonly used in Python? In Python, variables starting and ending with double underscores are typically to store metadata or are built into the system. For example, #!/usr/bin/env python __author__ = 'Michael0x2a' __license__ = 'GPL' class Test(object): def __init__(self): print 'Hello World!' if __name__ == '__main__': t = Test() I'm pretty certain __author__ and __license__ are pretty well known. What other double-underscore metadata variables are there? Is

This question already has an answer here: What is the difference between <%, <%=, <%# and -%> in ERB in Rails? 7 answers Sorry for this question, i think its more offtopic, but i couldn't find anything on google! I saw now multiple times that a lot of people use -%> instead of just %> . Whats the sense? Example: <% @images.each_slice(6) do |slice| -%> <div class="gallery"> <% slice.each do |image| -%> <%= image_tag(image.url, :alt => image.alt) %> <% end -%> </div> <% end -%> Source: Rails each loop insert tag every 6 items? Here he has also used -%> for all blocks. I would like to add some

What rules do you use to name your variables? Where are single letter vars allows? How much info do you put in the name? how about for example code? what are your preferred meaningless variable names? (after foo & bar) why are they spelled "foo" and "bar" rather than FUBAR function startEditing(){ if (user.canEdit(currentDocument)){ editorControl.setEditMode(true); setButtonDown(btnStartEditing); } } Should read like a narrative work. One rule I always follow is this: if a variable encodes a value that is in some particular units, then those units have to be part of the variable name. Example:

I have been reading about Optionals in Swift, and I have seen examples where if let is used to check if an Optional holds a value, and in case it does – do something with the unwrapped value. However, I have seen that in Swift 2.0 the keyword guard is used mostly. I wonder whether if let has been removed from Swift 2.0 or if it still possible to be used. Should I change my programs that contain if let to guard ? if let and guard let serve similar, but distinct purposes. The "else" case of guard must exit the current scope. Generally that means it must call return or abort the program. guard is