Questions tagged [precedence]
For questions about operator precedence.
21
questions
3
votes
0
answers
36
views
What's the effect of SyntaxForm option in StandardForm boxes of Superscript?
Consider the following sample:
...
- 62.8k
1
vote
1
answer
46
views
Finding a list of results of an arithmetic operation with a permutations of precendence
Consider 3* 2 + 2 /4*10
With the default precedence for *,+, and / the result is 11.
I am curious what the results would be for all six choices for the precedence ...
- 3,926
2
votes
1
answer
85
views
Simplify Map on a list of lists
I have the following example list of matrices:
a = {p Table[RandomComplex[], {2}, {2}], q Table[RandomComplex[], {2}, {2}]}
where p and q are real variables. I ...
- 957
2
votes
0
answers
67
views
Precedence of @@ vs /@ [closed]
How do I find what I think is called the "precedence" of a given operator. That is, for the following code:
...
- 101
11
votes
2
answers
261
views
i_:0|1 varies in v12.1: incompatible change or bug?
Just check
i_: 0 | 1 // FullForm
In v12.0 or earlier the output is
Alternatives[Optional[Pattern[i, Blank[]], 0], 1]
But in ...
- 62.8k
3
votes
1
answer
111
views
Why Divide does not give the same answer? [closed]
I saw a question on Facebook $8\div2 (2 + 2)=?$
Consider these inputs.
Divide[8, 2 (2 + 2)]
1
$8\div2 (2 + 2)$ using esc+div+esc
16
Why the results are ...
- 10.4k
2
votes
1
answer
104
views
Operator Precedence in Notation Package
I am trying to use the Notation package to define custom notation for chemical reactions. The natural thing to do is to use a
\[LongRightArrow]
for the operator....
- 2,267
10
votes
2
answers
422
views
Table of precedence values for all System` symbols
Has anyone created a table listing the precedences for all symbols? Also, it would be nice if there were a function that for a given precedence value or interval, returned all the symbols with that ...
- 129k
5
votes
1
answer
715
views
How exactly does Postfix notation work?
I guess I've been using the Postfix notation // wrongly for some time now. I assumed it was a quick way to apply a function to ...
- 4,137
11
votes
4
answers
662
views
Change Operator Precedence of --> operator
I am trying to use --> operator with highest precedence
...
- 961
10
votes
2
answers
487
views
Which operators are missing from the official precedence table?
I often use the Operator Input Forms page as a reference for operator precedence as well as which (used or unused) operators exist. However, I just noticed that at least one operator is missing from ...
- 8,724
19
votes
4
answers
883
views
Is it important that the front-end has a built-in parser?
The Notebook interface has a parser that seems aware of all operator-precedences, allowing us to step through the expressions (rather: Box-) hierarchy with Ctrl+.
This is extremely convenient, saving ...
- 5,679
3
votes
2
answers
138
views
PrecedenceForm with Format
I'd like to format the output of certain operators with Infix-style formatting to have lower precedence than Times.
Let's say I ...
- 3,463
7
votes
1
answer
722
views
How to construct custom operators with precedence?
I need to combine data structures in operations analogous to addition, subtraction, multiplication and division (and more). I need more than one operation of each type, i.e. more than one method of ...
- 275
9
votes
1
answer
254
views
Bug in grouping after editing code?
Bug introduced in 7.0 or earlier and persisting through 11.0
While looking at A question about conditional replacement I think I discovered a bug in the Front End that affects both 7.0.1 and 10.0.1 ...
- 269k
4
votes
3
answers
380
views
Notation package: parenthesis placement for SuperscriptBox
The question concerns the Notation package.
I want to define notation for the function very similar to the built-in Power[a,b] ...
- 781
1
vote
0
answers
103
views
custom precedence for custom infix operator with InfixNotation [duplicate]
I am trying to define several custom operators with custom precedence to implement geometric algebra. Loading the notation package
<< Notation`
I can ...
- 43
4
votes
1
answer
365
views
Why Min cannot be used as constrains of NMinimize?
I met a strange problem when trying to do an optimization.
Initialization code,
...
- 1,429
74
votes
3
answers
5k
views
when is f@g not the same as f[g]?
I have always thought that f@g will give the same result as f[g] in all cases, and it is just a matter of style which one to use ...
- 135k
35
votes
3
answers
1k
views
Prefix operator with low precedence
The question is simple, but I will elaborate on the background as well for those interested in the idea:
How to define a new operator with specified precedence value?
Background
Mathematica was ...
- 46.5k
23
votes
4
answers
1k
views
Making a symbol's new definitions be tried before all previously defined ones
Is there any way to "close" a package (or a symbol, or a context) in that if a user of the package adds definitions to the symbol they will be tried before the package defined ones, just like what ...
- 42.4k