Questions tagged [upvalues]
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82 questions
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Volume[Octahedron]^=1 adds Protected attribute back to unprotected Octahedron [duplicate]
In memory of my whole night.
I encountered this when trying to answer this question by fixing the old Geometry`Polytopes` Legacy Standard Add-On Package.
Consider ...
- 72.4k
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Is there a symbol or construct that when passed as argument returns the caller?
Like Identity when passed an argument it returns that argument.
Identity[x]
gives
x
Is there a similar symbol or construct <...
- 11.5k
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NumericQ evaluates to False at first, but then evaluates to True once I copy and paste the same input
After some struggling, this is my current minimal working example:
...
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44
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Defining multilinear function series expansion
I want to define an abstract multilinear function mlfunc in arbitrary arguments with the standard algebraic and analytic properties.
Implementing algebraic ...
- 181
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81
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How to make an UpValue about Message for Protected symbol?
I would like to intercept certain messages, like the following
...
- 1,696
2
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114
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Why can't I assign upvalues to NonCommutativeMultiply?
I'm trying to define a non-commutative product with respect to which, certain quantities (e.g. numbers, and some other quantities defined in my code) behave as "scalars" and can be pulled ...
- 461
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218
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Pattern matching vs. condition in a function
I'm trying to learn stuff from pattern matching but I found sometimes pattern matching does not work as I expected. Could anyone explain why the below outputs are not same? Thank you.
And could anyone ...
- 31
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3
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179
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Can't get TagSetDelayed to match LHS when the latter has a Hold attribute set
I'm following this example here;
Code Readability and Object-Oriented Code
...
- 800
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180
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Can UpValues (as well as other "*Values") always be converted to DownValues?
As this post has discussed, UpValues are certainly useful, and as this post has discussed, g /: f[g[x_]] := h[x] is not ...
- 627
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Overloading the Normal function
I am currently working on library that keeps functions in unevaluated form, e.g.
In: a = RhoVariable[s]
Out: RhoVariable[s]
RhoVariable has some definition, namely ...
- 94
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1
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90
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How to clear a selection of definitions from UpValues?
I'm trying to set up a bunch of 2D points using UpSet that I am going to use later for building lines and graphs.
...
- 342
18
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Broken ValueQ function in Mma12.2?
f[x] ^= 1;
ValueQ[g[x]]
returns True in Mathematica 12.2. Is it a bug?
- 1,126
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Define a function for symbols with UpValues
Suppose that we define UpValues for different symbols
isSpecialFunction[N1]^=True
isSpecialFunction[N2]^=True
isSpecialFunction[N3]^=True
I would like to make the ...
- 1,688
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69
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How to duplicate UpValue of one function to another?
Let's say I have defined a function zO for the following up-values
...
- 1,483
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1
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156
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What are some ways to overload Min in order for it to work with user defined expressions?
I have defined size to work with discrete size labels:
...
