I am looping through an array of strings, such as (1/12/1992 apple truck 12/10/10 orange bicycle). The array's length will always be divisible by 3. I need to loop through the array and grab the first 3 items (I'm going to insert them into a DB) and then grab the next 3 and so on and so forth until all of them have been gone through.
//iterate the array
for (int i = 0; i < theData.Length; i++)
{
//grab 3 items at a time and do db insert, continue until all items are gone. 'theData' will always be divisible by 3.
}
Just increment i
by 3 in each step:
Debug.Assert((theData.Length % 3) == 0); // 'theData' will always be divisible by 3
for (int i = 0; i < theData.Length; i += 3)
{
//grab 3 items at a time and do db insert,
// continue until all items are gone..
string item1 = theData[i+0];
string item2 = theData[i+1];
string item3 = theData[i+2];
// use the items
}
To answer some comments, it is a given that theData.Length
is a multiple of 3 so there is no need to check for theData.Length-2
as an upperbound. That would only mask errors in the preconditions.
i++
is the standard use of a loop, but not the only way. Try incrementing by 3 each time:
for (int i = 0; i < theData.Length - 2; i+=3)
{
// use theData[i], theData[i+1], theData[i+2]
}
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With