unify | wrapbootstrap unify template with ember
kandi X-RAY | unify Summary
kandi X-RAY | unify Summary
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QUESTION
I can unify operands in SWI-Prolog, for example:
...ANSWER
Answered 2022-Apr-07 at 17:42You unify terms. Both +(1,2)
and 1 + 2
are the same term.
You may use the univ predicate (=..
) to decompose a term like this:
QUESTION
What I have to do is to unify the possible options and solve the problem with these sentences
- The Spaniard lives next to the red house.
- The Norwegian lives in the blue house.
- An Italian lives in the second house.
This is my attempt but I am getting an error, could someone please help me.
...ANSWER
Answered 2022-Mar-31 at 13:30You may write a procedure that enforces each of your rules, and then let prolog find the possible ordering of houses that fulfill all those rules:
QUESTION
I do have a problem with one column of my dataset. My "Tags" column is an object type in pandas. The Tags are in a list. Now i want to apply a lambda function to get the length of the list. I got following error message:
object of type 'float' has no len()
I analyzed the dataset and found that I have str, float and None types. I queried the None Types in my Lambda function, using an if clause. Now my problem is, I don't know how to unify the other datatypes, that all datatypes are of type List.
I tried the .astype function, but there I get the following error message:
data type 'list' not understood
Maybe someone can provide me an answer :)
Edit:
...ANSWER
Answered 2022-Mar-28 at 19:24@mozway pointed out that df['Tags'].str.len()
gracefully handles objects with undefined length!
One workaround is to define a custom function to handle the TypeError
which arises from objects with no defined length. For example, the following function returns the length of each object in df['Tags']
, or -1 if the object has no length:
QUESTION
I am a python.new who need some help in the following question:
I got a dataframe like this.
df:
index height unit 0 181.5 cm 1 72.5 inches 2 168.0 cm 3 NaN NaN .. .. .....2000+rows
...ANSWER
Answered 2022-Mar-23 at 08:56Use a dictionary to map conversion factors and use indexing to update the values/units:
QUESTION
When writing a function in TypeScript, is there a way to let the function infer what to do according to the input's type?
For example, let's say that I have a function that calculates the maximum value.
In scenario A, the input is a numeric array (i.e.,
...type: number[]
), and I want it to return the max value. So I could do:
ANSWER
Answered 2022-Mar-13 at 13:36Does this work for you...
QUESTION
Consider the following type definition of a sized list:
...ANSWER
Answered 2022-Mar-19 at 09:48By itself, Coq is not very good for writing this kind of code, but you can use the Equations plugin to make it simpler. Nevertheless, let us see how we can do it without external dependencies:
QUESTION
I am practicing Idris, and I want to obtain a list of slices from a vector.
First, I defined the following window
function which returns m
elements from the index i
onwards (i.e. xs[i:i+m]
):
ANSWER
Answered 2022-Feb-27 at 03:29Because of implicit parameters, the list comprehension here is not the same as writing literally
QUESTION
I have a set of 32 bit integers with which I will be making a data structure that will put these integers in different components ( like dsu ) the join operation has to be performed using bitwise and, if the bitwise and is not zero of two integers they lie in the same component, now given an integer how do I get ( assuming the data structure is already created for the prefix of this current integer ) the component in which this integer will lie? ex say [1,5,3,8] are given set of integers than (1,5,8) lie in one component because lsb for any pair will ensure non zero "bit and" and (8) will lie in it's own component, Or quite possibly entirely different algorithm that is much simpler if you can think of,
Edit :
It is possible however that two integers have bit and as zero but if third integer is introduced which has pairwise bit and non zero with both of them then all three will lie in same component ex [2,12, 6] 2 and 12 on operation give 0 but 2 and 6 do not and 12 and 6 do not so 6 will unify all three in one component.
Edit 2 : I am able to think of a naive algorithm that uses 32 length array for which one entry consists of linked list like structure ( like adjecentcy list ) that is if i'th bit is set then index i will contain all the integers with i'th set bit, but it could give me O(n) search, I'm thinking more towards dsu, but finding it difficult how to create it.
...ANSWER
Answered 2022-Feb-12 at 12:59The requirements imply that an incoming integer x
should be joined with component C
if and only if the bitwise AND of x
with the (bitwise OR of all numbers in C
) is nonzero.
A disjoint-set data structure would work well for this. The 'root' of each component could also maintain the bitwise OR of all of its members, which can be done with a separate hashmap, although this isn't strictly necessary.
You should also keep a hashmap from each bit-position to any member of the (unique, if it exists) component that has that bit-position set. When adding a new integer, scan over all of its set-bits: use this hashmap to find all the components to union, or whether to make a new component. This should give almost constant-time updates. There are also at most 1 + ceil(log_2(M))
different components at any time, where M
is the largest integer you've seen, which would be at most 33.
If you want to avoid some of the complexity of the Disjoint-Set code, you could go with Paul Hankin's suggestion of a list of components. Depending on your programming language and whether you want to count duplicates, a component could be represented as a (bitmask, multiset) pair, where the bitmask is the bitwise OR of all members, and the multiset of members lets you print all members of a component and test for containment in O(1)
time, although insertions could take longer (but still constant amortized time).
If you never need to print the members of a component or check whether a particular integer was ever actually added, it suffices to just store the bitmasks.
QUESTION
Working with Pandas: I have a very large dataframe where one column (imported from many .csv and .xlsx files) has mixed dates in different formats. I manage to unify all the separators /.- but still not able to unify the dates YYYY/MM/DD and DD/MM/YYYY into one of them (not really relevant which).
I have a column in a very large DataFrame:
...ANSWER
Answered 2022-Jan-12 at 22:04Assuming the Date
column values are strings (and assuming there aren't any weird formats like %Y-%d-%m
), I was able to simply use pd.Timestamp
:
QUESTION
I was tinkering around to figure out a way to unify a data access layer for some databases which have types that are identical field wise but reside in different EF DB contexts. I came up with something like this (plz ignore the string interpolation, this is just a prototype):
...ANSWER
Answered 2022-Jan-04 at 22:44Since all events have the same fields which can be extracted to then interface and assuming that concrete T
's are mapped to corresponding contexts you can just use the DbContext.Set
method:
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npm install
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