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return query based on date
I have a data like this in mongodb
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How to check whether a file or directory exists?
I want to check the existence of file ./conf/app.ini in my Go code,
but I can't find a good way to do that.
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Git clone without .git directory
Is there a flag to pass to git when doing a clone, say don't clone the .git directory? If not, how about a flag to delete the .git directory after the clone?
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Install specific git commit with pip
I'm developing a django app and I'm using pip to manage my requirements. How can I do to install a specific git's commit?
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what is the preferred way to mutate a React state?
... a list of plain objects in my this.state.list that I can then use to render a list of children. What then is the right way to insert object into this.state.list ?
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How do I use DateTime.TryParse with a Nullable?
I want to use the DateTime.TryParse method to get the datetime value of a string into a Nullable. But when I try this:
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Is there an exponent operator in C#?
For example, does an operator exist to handle this?
8 Answers
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How is set() implemented?
...t objects in python have O(1) membership-checking. How are they implemented internally to allow this? What sort of data structure does it use? What other implications does that implementation have?
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What is the meaning of “__attribute__((packed, aligned(4))) ”
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Get current time in seconds since the Epoch on Linux, Bash
I need something simple like date , but in seconds since 1970 instead of the current date, hours, minutes, and seconds.
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