Using two array in single for each loop

Question

In my application i have string like this 1,2,3&&4,5,6. Now i want check each and every element in single for each loop. Is it possible or not? If its possible how can i acheive this?.

Am trying using split method. But if i am using split method i want more than loop.

Like

dim sa as string=1,2,3&&4,5,6

for each x as string in sa.split("&&")
  for each y as string in x.split(",")
    ''' Here My Process
  next
next

How can over come this?. how can change to single loop?. It is possible or not?.

I'm confused as to what exactly you are trying to do, are you only interested in the integer values? Is this the only string that needs parsed? any more info would help — Josh
– Josh, Commented May 20, 2013 at 12:59

Victor Zakharov · Accepted Answer · 2013-05-20 13:29:17Z

2

String.Split has an overload that accepts an array of string delimiters:

Dim input As String = "1,2,3&&4,5,6"
For Each element As String In input.Split({",", "&&"}, StringSplitOptions.None)
  'do your processing on (1,2,3,4,5,6)
Next

edited May 20, 2013 at 13:29

answered May 20, 2013 at 13:04

Victor Zakharov

26.6k18 gold badges95 silver badges158 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Epsil0neR · Accepted Answer · 2013-05-20 12:59:33Z

2

As I understand, you want to use only one for each instead of using for each in for each.

You can first split by "&&" and then join with ",":

dim sa as string=1,2,3&&4,5,6
dim stringArray = String.Join(",", sa.split("&&")).split(",")

for each x as string in stringArray
end for

answered May 20, 2013 at 12:59

Epsil0neR

1,70416 silver badges25 bronze badges

6 Comments

Bathsheba Over a year ago

Ingenious but not too efficient. I think that using regular expressions is a good habit to get into.

Victor Zakharov Over a year ago

@Bathsheba: so you think regex is super-efficient? :)

Bathsheba Over a year ago

Probably not if Microsoft implemented the parser ;-)

Victor Zakharov Over a year ago

@Bathsheba: Any universal processing is generally worse in performance than any specific implementation. If you provided performance analysis in your answer, and your regex is faster, we could talk about efficiency. :)

Victor Zakharov Over a year ago

@Bathsheba: Maintainability and efficiency are two different things, often going in opposite directions of each other. So the more you get one, the more you lose the other.

|

Bathsheba · Accepted Answer · 2013-05-20 12:58:22Z

0

You could split using a regular expression as a delimiter:

Imports System.Text.RegularExpressions 'goes at the top of the module

For Each x As String In Regex.Split(sa, "\,|&&")

Where the regular expression means "comma or two ampersands". Note that you need to 'escape' the comma using a backslash; this is because commas do something special in regular expressions.

Don't forget to enclose your string in quotes:

dim sa as string="1,2,3&&4,5,6"

answered May 20, 2013 at 12:58

Bathsheba

235k35 gold badges376 silver badges504 bronze badges

Comments

Alistair Findlay · Accepted Answer · 2013-05-20 13:04:23Z

0

One option would be to split on the "," and the "&" via the Split method and ignore empty entries, as such:

Dim sa As String = "1,2,3&&4,5,6"
Dim split As String() = sa.Split(New Char() {",", "&"}, StringSplitOptions.RemoveEmptyEntries)

For Each value In split
    Debug.WriteLine(value)
Next

answered May 20, 2013 at 13:04

Alistair Findlay

1,1546 silver badges12 bronze badges

Collectives™ on Stack Overflow

Using two array in single for each loop

4 Answers 4

Comments

6 Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

Comments

6 Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related