C# Change Variable Name By Values in For Loop

Question

I have 4 string List variables:

var cat1 = new List<string>();
var cat2 = new List<string>();
var cat3 = new List<string>();
var cat4 = new List<string>();

if (value== "1")
{
    cat1.Add(value.ToString());
}

else if (value== "2")
{
    cat2.Add(value.ToString());
}

else if (value == "3")
{
    cat3.Add(value.ToString());
}

else if (value== "4")
{
    cat4.Add(value.ToString());
}

Instead of using 4 if-else, can I use for-loop by changing variable names in each loop increment?

Such as:

for (int i = 1; i < 5; i++)
{
    cat[i].Add(value.ToString());
}

wait, do you want to add value.ToStrong() to all of your lists? Why don't you just add it then to one-by-one? — vasily.sib
– vasily.sib, Commented May 22, 2019 at 2:46

Backs · Accepted Answer · 2019-05-22 02:35:59Z

4

Place your lists in array and use indexes from 0 to 4 in for loop:

var cat1 = new List<string>();
var cat2 = new List<string>();
var cat3 = new List<string>();
var cat4 = new List<string>();

var cat = new[] { cat1, cat2, cat3, cat4 };

for (int i = 0; i < 4; i++)
{
    cat[i].Add(value.ToString());
}

answered May 22, 2019 at 2:35

Backs

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2 Comments

vasily.sib Over a year ago

your code will add value.ToString() to all of this lists. Why don't you just var v = value.ToString(); cat1.Add(v); cat2.Add(v); cat3.Add(v); cat4.Add(v);?

gymcode Over a year ago

@vasily.sib thank you for your advice. I have implemented it.

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