Why is it important to remove whitespace from the end of a line in C? [closed] - c

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Most of the pre-commit check tools I have used with different organizations do not allow whitespace at the end of lines. What is the motivation for this? Can it cause different behaviour, increase flash memory usage, or is it just a stylistic thing?

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ABAP TRY CATCH: performance? best practices? [closed]

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How is TRY/CATCH in ABAP w.r.t. performance? Does it cost resources? If so, TRY/CATCH should be placed outside a loop, I guess.
What are there best practices in ABAP w.r.t. TRY/CATCH?

react styled-components VS emotion [closed]

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You are about to select a style module during the new project.
The two ways of using them seem almost the same.
Which one does it look good to choose?
Project wants to do stack overflow clone coding
awdawdawdasdadawdaqwda

How to represent optional attributes in an ER diagram? [closed]

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I know you can do the line/circle notation, but our lecture says we're not supposed to use those attributes. We're supposed to find a better solution. I've been reading the recommended database book, but the author DOES use the notation..? He doesn't seem to present an alternative.
Optional attributes can be represented with a dotted line connection to their respective entity. For example:optional attribute

What is the best way to share a variable across multiple threads? [closed]

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I have a variable that I would like to be shared across multiple threads, and have it be incremented only once when all of the threads have used its current value. What is the best way to accomplish this in C?

What rough spots or omissions in the GAE docs tripyou up or cost you time? [closed]

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If you could wave the magic wand and fix something in the GAE 1.5.5 documentation that have caused you lost time, grief, or missed opportunities, what would they be?
Now that the Datastore reads is a crucial quota in our billing, I would like to read something about the "Datastore reads costs" since only the write part is covered.

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