typecast | experimental python library for defining casts
kandi X-RAY | typecast Summary
kandi X-RAY | typecast Summary
These examples show possible uses for this library. However there might be many others: Improving APIs, interoperability of external libraries, etc. I encourage the curious reader to think of ways this library might apply to solve some of the design challenges in their current projects.
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Top functions reviewed by kandi - BETA
- Decorator that applies autocast
- Cast obj to target_cls
- Decorator to match annotations
- A breadth - first search
- Cast instance to type_
- Cast instance to target_cls
- Decorator for typecast functions
- Return the cast elements for the given attribute
- Add a cast function
typecast Key Features
typecast Examples and Code Snippets
Community Discussions
Trending Discussions on typecast
QUESTION
I have trouble understanding the first line of code inside this implementation of the bsearch function in C. I understand the search algorithm itself and I have played around with this function to get a good grasp of it but I still do not get what
...ANSWER
Answered 2021-Jun-15 at 21:44Within the function you need to find each element in the passed array. However the type of the array is unknown. You only know the size of each element of the array and the starting address of the array that is passed through the parameter base0. of the type const void *
..
To access an element of the array you need to use the pointer arithmetic. But the type void is incomplete type. Its size is unknown/ So you may not use the pointer of the type (const) void *` in expressions with the pointer arithmetic.
Thus this declaration
QUESTION
I am trying to retrieve a document from firestore in my c# application but for some reason when I typecast the array coming from firestore it is returning null. Any help would be appreciated. Thanks in advance
C# Code
...ANSWER
Answered 2021-May-02 at 10:23Did you check the type
of testarray
. Is the conversion from type
to string[]
possible?
as
returns null
when the conversion is not possible - see description of as operator.
The as operator explicitly converts the result of an expression to a given reference or nullable value type. If the conversion is not possible, the as operator returns null.
QUESTION
I am parsing a json file which contains keyword arguments for a function some_function
which is called in succession.
JSON FILE
ANSWER
Answered 2021-Jun-06 at 14:37You can modify the existing dict first.
QUESTION
I have an array like this:
...ANSWER
Answered 2021-Jun-06 at 12:57You can iterate over the array using Array#filter
and only keep the elements that are not numbers using isNaN
:
QUESTION
I have created a Pygame application where I have about 25 rectangles. I want to display 25 different text values (which is a numerical value but typecasted in str
- I mention this because I believe we need string in the first argument) at the center of the rectangle. I have imported a csv file that contains data.
ANSWER
Answered 2021-Jun-05 at 07:30All of the text is drawn on top of each other. You need to draw the text at different positions. e.g.:
QUESTION
I have this table in postgres
...ANSWER
Answered 2021-Jun-01 at 18:26The problem isn't with the CTE
, but with how you're passing values into the VALUES
clause. Somehow all values created inside of the CTE
at VALUES
are being sent as text (perhaps the query is created with all values between single quotes?). The following example reproduces your query with pure SQL statements, and it works as it should:
QUESTION
Is the following type cast from sockaddr_in* to sockaddr* a violation of "strict aliasing rule" ?
Example code snippet from "Beej's Guide to Network programming" (version 2.3.23). The typecast is happening at the last line.
...ANSWER
Answered 2021-Jun-01 at 04:17A lot of the UNIX networking foundations are built on these sorts of creative "abuses" of structures. This can make using these functions and structures in non C code quite difficult as many languages, like C++, forbid these sorts of arbitrary recasting operations by default.
In C++ you will need to deal with the fact that, yes, technically these are not valid casts, but the UNIX networking specification has been around for decades and is a known commodity. You can make reasonable assumptions about what is and isn't a valid conversion regardless of what the compiler insists.
As always you will need to tread carefully, but especially when doing these sorts of casts.
QUESTION
in the below, code action type (action as SucceededAction) is specified in the reducer and things are working but if I remove (as SucceededAction) I am getting an error 'payload does not exist on type 'SucceededAction | FailedAction'.'
Now if I replace the constants with --
type_SUCCEEDED:'type_SUCCEEDED',type_FAILED:'type_FAILED' and use them like type_FAILED and type_SUCCEEDED instead of type.FAILED, type.SUCCEEDED, it works without typecasting.
So, in the code below I think typeof is not working for my actions due to which I have to typecast in the reducers. Want to know the exact cause for the same. Please help if you know the reason and help me out here to find out the mistake in the code below.
Thanks.
...ANSWER
Answered 2021-May-30 at 17:18Right now TypeScript sees both type.SUCCEEDED
and type.FAILED
as string
. This means that your action, SucceededAction | FailedAction
, is just { readonly type: string; readonly payload: string; } | { readonly type: string; }
.
The type names need to be string literal types in order to discriminate the union. This can be done in two ways:
1) EnumsYou can make your type
variable an enum
:
QUESTION
I'm setting up a function that will retrieve data from my database. It takes a key string as argument, and it returns a different data type based on the key.
My goal is to have TypeScript infer the type that will be returned based on the key that's passed as argument.
This is what I've tried:
...ANSWER
Answered 2021-May-30 at 01:13There is actually several ways, here is one way
QUESTION
ANSWER
Answered 2021-May-27 at 12:23First you are dealing with a 4 byte values and double
require 8 bytes. What you want is using single
as it's a 4 bytes.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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No vulnerabilities reported
Install typecast
You can use typecast like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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