indexoutofrangeexception

Cannot subscript a value of type 'Self' with an index of type 'Int' in Swift 4?

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问题 I have been getting an array index out of range error and then came across this question. Reference link And this is the block of code. import UIKit import Foundation import CoreBluetooth EDIT 1: From what Leo suggested, so the error is gone from this block but index out of range still persists extension Collection where Index == Int { func get(index: Int) -> Element? { if 0 <= index && index < count { return self[index] } else { return nil } } } class Sample:UIViewController{ ....... //This

What is an IndexOutOfRangeException / ArgumentOutOfRangeException and how do I fix it?

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问题 I have some code and when it executes, it throws a IndexOutOfRangeException , saying, Index was outside the bounds of the array. What does this mean, and what can I do about it? Depending on classes used it can also be ArgumentOutOfRangeException An exception of type 'System.ArgumentOutOfRangeException' occurred in mscorlib.dll but was not handled in user code Additional information: Index was out of range. Must be non-negative and less than the size of the collection. 回答1: What Is It? This

IndexError: list index out of range, not sure why

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问题 What I would like the program to do is to take sequences related to a certain barcode and perform the defined function (average length and standard deviation of sequences, minus the barcode and non-relevant txt, identified by the same barcode). I have written something similar and based it off the similar program but I keep getting an indexerror. The idea is that all the sequences with the first barcode will be processed as barcodeCounter = 0 and the second one as barcodeCounter = 1, etc.

Getting “Index was out of range” exception in DataGridView when clicking header

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问题 I am using a DataGridView to display my data from a SQLite database. One column is a directory to open pdfs assigned to the row. The code works but, every time I click on the column title, it gives me the error: Index was out of range. Must be non-negative and less than the size of the collection. Actually, any time I click the column text (just "PDF", or any other column's text) it throws that error. But when I click outside the text (anywhere in the ordering box), it reorders my columns,

Getting “Index was out of range” exception in DataGridView when clicking header

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I am using a DataGridView to display my data from a SQLite database. One column is a directory to open pdfs assigned to the row. The code works but, every time I click on the column title, it gives me the error: Index was out of range. Must be non-negative and less than the size of the collection. Actually, any time I click the column text (just "PDF", or any other column's text) it throws that error. But when I click outside the text (anywhere in the ordering box), it reorders my columns, which is ok. Any ideas? The code works, opens up the PDF, but I don't want the user accidentally clicking

What is an IndexOutOfRangeException / ArgumentOutOfRangeException and how do I fix it?

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问题 I have some code and when it executes, it throws a IndexOutOfRangeException , saying, Index was outside the bounds of the array. What does this mean, and what can I do about it? Depending on classes used it can also be ArgumentOutOfRangeException An exception of type \'System.ArgumentOutOfRangeException\' occurred in mscorlib.dll but was not handled in user code Additional information: Index was out of range. Must be non-negative and less than the size of the collection. 回答1: What Is It? This

What is an “index out of range” exception, and how do I fix it? [duplicate]

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问题 This question already has answers here : What is an IndexOutOfRangeException / ArgumentOutOfRangeException and how do I fix it? (4 answers) Closed 4 years ago . I\'m getting one of the following errors: \"Index was out of range. Must be non-negative and less than the size of the collection\" \"Insertion index was out of range. Must be non-negative and less than or equal to size.\" \"Index was outside the bounds of the array.\" What does it mean, and how do I fix it? See Also