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PHP date() format when inserting into datetime in MySQL
What is the correct format to pass to the date() function in PHP if I want to insert the result into a MySQL datetime type column?
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Convert file: Uri to File in Android
What's the easiest way to convert from a file: android.net.Uri to a File in Android?
18 Answers
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How can I round up the time to the nearest X minutes?
Is there a simple function for rounding UP a DateTime to the nearest 15 minutes?
13 Answers
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TSQL - Cast string to integer or return default value
Is there a way in T-SQL to cast an nvarchar to int and return a default value or NULL if the conversion fails?
8 Answers
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How do I make a list of data frames?
How do I make a list of data frames and how do I access each of those data frames from the list?
8 Answers
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How to check if a string is a valid hex color representation?
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Hashing a string with Sha256
I try to hash a string using SHA256, I'm using the following code:
7 Answers
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Replace all elements of Python NumPy Array that are greater than some value
I have a 2D NumPy array and would like to replace all values in it greater than or equal to a threshold T with 255.0. To my knowledge, the most fundamental way would be:
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How to tell which version of a gem a rails app is using
I'm investigating a rails app - the prod server has two version of a specific gem installed, how can I tell which version the prod app is using?
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How to efficiently build a tree from a flat structure?
I have a bunch of objects in a flat structure. These objects have an ID and a ParentID property so they can be arranged in trees. They are in no particular order.
Each ParentID property does not necessarily matches with an ID in the structure. Therefore their could be several trees emerging ...