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Efficient list of unique strings C#
What is the most efficient way to store a list of strings ignoring any duplicates?
I was thinking a dictionary may be best inserting strings by writing dict[str] = false; and enumerating through the keys as a list. Is that a good solution?
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Convert unix time to readable date in pandas dataframe
I have a dataframe with unix times and prices in it. I want to convert the index column so that it shows in human readable dates.
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Solutions for INSERT OR UPDATE on SQL Server
...S..) approach is very dangerous.
When multiple threads will try to perform Insert-or-update you can easily
get primary key violation.
Solutions provided by @Beau Crawford & @Esteban show general idea but error-prone.
To avoid deadlocks and PK violations you can use something like this:
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How do you perform a CROSS JOIN with LINQ to SQL?
How do you perform a CROSS JOIN with LINQ to SQL?
5 Answers
5
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How do I access the request object or any other variable in a form's clean() method?
I am trying to request.user for a form's clean method, but how can I access the request object? Can I modify the clean method to allow variables input?
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Invoke a callback at the end of a transition
I need to make a FadeOut method (similar to jQuery) using D3.js . What I need to do is to set the opacity to 0 using transition() .
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Media Queries - In between two widths
I'm trying to use CSS3 media queries to make a class that only appears when the width is greater than 400px and less than 900px. I know this is probably extremely simple and I am missing something obvious, but I can't figure it out. What I have come up with is the below code, appreciate any help.
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ManyRelatedManager object is not iterable
Trying to do this:
6 Answers
6
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How to create an array from a CSV file using PHP and the fgetcsv function
Can someone kindly provide a code to create an array from a CSV file using fgetcsv?
14 Answers
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How can I get the diff between all the commits that occurred between two dates with Git?
Or just all the commits that occurred between two dates? In SVN, you could do something like
11 Answers
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