Recent questions tagged iterator

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iterator - split a generator/iterable every n items in python (splitEvery)

I'm trying to write the Haskell function 'splitEvery' in Python. Here is it's definition: splitEvery :: Int -> [e] -> [[e ... 4], [5, 6, 7, 8]] See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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iterator - Is there an owned version of String::chars?

The following code does not compile: use std::str::Chars; struct Chunks { remaining: Chars, } impl Chunks { fn new ... to keep a Vec<char> and an index myself? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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iterator - Is there any built-in way to get the length of an iterable in python?

For example, files, in Python, are iterable - they iterate over the lines in the file. I want to count the number ... just don't want it in memory all at once Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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iterator - Why does defining __getitem__ on a class make it iterable in python?

Why does defining __getitem__ on a class make it iterable? For instance if I write: class b: def __getitem__(self, k) ... an error returned from "for k in cb:" Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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iterator - How does RecursiveIteratorIterator work in PHP?

How does RecursiveIteratorIterator work? The PHP manual has nothing much documented or explained. ... between IteratorIterator and RecursiveIteratorIterator? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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614 views

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iterator - Python: print a generator expression?

In the Python shell, if I enter a list comprehension such as: >>> [x for x in string.letters if x ... and print that generator object in the interactive shell? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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iterator - How does zip(*[iter(s)]*n) work in Python?

s = [1,2,3,4,5,6,7,8,9] n = 3 zip(*[iter(s)]*n) # returns [(1,2,3),(4,5,6),(7,8,9) ... ) work? What would it look like if it was written with more verbose code? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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iterator - run function recursively over table

Every call to function fx left-joins a new column to x based on some data in table t and integers ... ://stackoverflow.com/questions/65866422/run-function-recursively-over-table...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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iterator - TypeError: 'module' object is not callable self.transform

I'm trying to iterate on a custom dataset, and it's failed on image transform. transform = transforms ... /questions/65645916/typeerror-module-object-is-not-callable-self-transform...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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714 views

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iterator - Operator Precedence and Order of Evaluation in Ruby: yield vs << (shovel operator)

I'm reading this book Well-Grounded Rubyist and its Control-Flow Techniques chapter on p.184 has a simple example ... -and-order-of-evaluation-in-ruby-yield-vs-shovel-operato...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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731 views

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iterator - split a generator/iterable every n items in python (splitEvery)

I'm trying to write the Haskell function 'splitEvery' in Python. Here is it's definition: splitEvery :: ... 1915170/split-a-generator-iterable-every-n-items-in-python-splitevery...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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718 views

1 answer

iterator - Iterating over and deleting from Hashtable in Java

I have a Hashtable in Java and want to iterate over all the values in the table and delete a particular ... com/questions/2351331/iterating-over-and-deleting-from-hashtable-in-java...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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740 views

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iterator - Iterating over and deleting from Hashtable in Java

I have a Hashtable in Java and want to iterate over all the values in the table and delete a particular ... com/questions/2351331/iterating-over-and-deleting-from-hashtable-in-java...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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659 views

1 answer

iterator - Iterating over and deleting from Hashtable in Java

I have a Hashtable in Java and want to iterate over all the values in the table and delete a particular ... com/questions/2351331/iterating-over-and-deleting-from-hashtable-in-java...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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635 views

1 answer

iterator - In Go is it possible to iterate over a custom type?

I have a custom type which internally has a slice of data. Is it possible, by implementing some functions or an interface ... /in-go-is-it-possible-to-iterate-over-a-custom-type...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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808 views

1 answer

iterator - Operator Precedence and Order of Evaluation in Ruby: yield vs << (shovel operator)

I'm reading this book Well-Grounded Rubyist and its Control-Flow Techniques chapter on p.184 has a simple example of ... and order of evaluation in acc << yield self[c]?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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