Can you please explain what's going on in this code [closed] - asp.net-mvc

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int pageNumber = (page ?? 1);
Please Can anyone please explain this code?

if page variable is assigned it will set pageNumber to that value or else if page is null it will set pageNumber to 1

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tfidf.idf_ what is meaning of this in the code [closed]

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tfidf = TfidfVectorizer(lowercase=False, )
tfidf.fit_transform(questions)
dict key:word and value:tf-idf score
word2tfidf = dict(zip(tfidf.get_feature_names(), tfidf.idf_))
https://scikit-learn.org/stable/modules/generated/sklearn.feature_extraction.text.TfidfVectorizer.html
idf_: array of shape (n_features,)
The inverse document frequency (IDF) vector; only defined if use_idf is True.

Global Variable Not Update ( Swift ) [closed]

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I have a global variable, but when I give the value of the variable does not change when I
run in viewDidload, this is my code :
(https://pastebin.com/7QbBjLNC)
The data is being fetched asynchronously and the print statement is getting executed before the response is received. print the data after you assign value to self.jumlahStok

Strip of substring from a string in swift [closed]

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I have a string with brackets in it from which have to remove/strip the substring.
For ex:
"8383838383(1234)" //string value
"8383838383" // desired result.
Thanks in advance
"8383838383(1234)".substringToIndex(string.rangeOfString("(")!.startIndex)
// "8383838383"
Building on #Tim's suggestion -
let strFull = "8383838383(1234)"
var str = strFull.substringToIndex(strFull.rangeOfString("(")!.startIndex)

F# Condition Statement [closed]

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How to write something
if !inBoundary then do
printfn "no it's not within the boundary"
You can use the not built-in function (and omit the do keyword after then):
let inBoundary = false
if not inBoundary then
printfn "no it's not within the boundary"

core data custom cell [closed]

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I try to write to out of the cells label but it not work.
My Code is like this:
cell.idNummer.text = [NSString string With Format: #"%#", laddataId];
In core data is laddataId an integer 32. What should I write to display in label?
Use this:
cell.idNummer.text = [NSString stringWithFormat:#"%d", laddataId];
Please see this. It will help a lot.
Hope this helps.. :)

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