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JavaScript - get the first day of the week from current date

I need the fastest way to get the first day of the week. For example: today is the 11th of November, and a Thursday; and I want the first day of this week, which is the 8th of November, and a Monday. I need the fastest method for MongoDB map function, any ideas? ...
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How to swap the buffers in 2 windows emacs

I am using emacs I find that sometimes I have 2 files separated into 2 windows. 8 Answers ...
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git branch -d gives warning

Just want to get a better understanding of the warning message after I deleted a local branch 4 Answers ...
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What does -D_XOPEN_SOURCE do/mean?

I recently encountered some code that gcc would not compile without this arg. I checked the gcc man page, but did not find this specific option. I did find XOPEN_SOURCE , but there was little explanation of what it does. ...
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Check if a user has scrolled to the bottom

...'m making a pagination system (sort of like Facebook) where the content loads when the user scrolls to the bottom. I imagine the best way to do that is to find when the user is at the bottom of the page and run an ajax query to load more posts. ...
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Get value of c# dynamic property via string

I'd like to access the value of a dynamic c# property with a string: 11 Answers 11 ...
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How to debug Lock wait timeout exceeded on MySQL?

In my production error logs I occasionally see: 11 Answers 11 ...
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What exactly does git's “rebase --preserve-merges” do (and why?)

Git's documentation for the rebase command is quite brief: 2 Answers 2 ...
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How to round to 2 decimals with Python?

I am getting a lot of decimals in the output of this code (Fahrenheit to Celsius converter). 16 Answers ...
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How to select rows from a DataFrame based on column values?

How to select rows from a DataFrame based on values in some column in Pandas? 10 Answers ...