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Why are side-effects modeled as monads in Haskell?
Could anyone give some pointers on why the impure computations in Haskell are modelled as monads?
8 Answers
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Node.js Error: Cannot find module express
... applications always look in their local context for any dependencies. The global installation is only for setting up system-wide available binaries, such as unit test runners or bootstrappers or things like that.
With Express, when you install it globally, you get an express binary that can bootst...
What is %2C in a URL?
I'm trying to understand the structure of a URL, and I'm seeing a lot of %2C . I'm guessing this is a result of some encoding. What does that stand for?
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How to convert/parse from String to char in java?
How do I parse a String value to a char type, in Java?
14 Answers
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Getting the caller function name inside another function in Python? [duplicate]
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You can use the inspect module to get the info you want. Its stack method returns a list of frame records.
For Python 2 each frame record is a list. The third element in each record is the caller name. What you want is this:
>>> import inspect
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Converting String to “Character” array in Java
I want to convert a String to an array of objects of Character class but I am unable to perform the conversion. I know that I can convert a String to an array of primitive datatype type "char" with the toCharArray() method but it doesn't help in converting a String to an array of objects of C...
Node.js/Windows error: ENOENT, stat 'C:\Users\RT\AppData\Roaming\npm'
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Manually creating a folder named 'npm' in the displayed path fixed the problem.
More information can be found on Troubleshooting page
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What is an undefined reference/unresolved external symbol error and how do I fix it?
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Compiling a C++ program takes place in several steps, as specified by 2.2 (credits to Keith Thompson for the reference):
The precedence among the syntax rules of translation is specified by the following phases [see footnote].
Phys...
PHP date() format when inserting into datetime in MySQL
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The problem is that you're using 'M' and 'D', which are a textual representations, MySQL is expecting a numeric representation of the format 2010-02-06 19:30:13
Try: date('Y-m-d H:i:s') which uses the numeric equivalents.
edit: switched G to H, though it m...
Merging two images in C#/.NET
Simple idea: I have two images that I want to merge, one is 500x500 that is transparent in the middle the other one is 150x150.
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