Update specific field on specific index

As an alternative for prior versions of Appian, the Dictionary Manipulation plugin is very useful for these sorts of things:

a!localVariables(
  local!data: {
    { index: 1, name: "John", lastName: "Doe" },
    { index: 2, name: "Henry", lastName: "Doe" },
    { index: 3, name: "Jenny", lastName: "Doe" },
  },
  
  a!forEach(
    items: local!data,
    expression: if(
      fv!index=2,
      updatedictionary(
        fv!item,
        {
          name: "Jerry"
        }
      ),
      fv!item
    )
  )
)

As an alternative for prior versions of Appian, the Dictionary Manipulation plugin is very useful for these sorts of things:

a!localVariables(
  local!data: {
    { index: 1, name: "John", lastName: "Doe" },
    { index: 2, name: "Henry", lastName: "Doe" },
    { index: 3, name: "Jenny", lastName: "Doe" },
  },
  
  a!forEach(
    items: local!data,
    expression: if(
      fv!index=2,
      updatedictionary(
        fv!item,
        {
          name: "Jerry"
        }
      ),
      fv!item
    )
  )
)

Sorry for the late reply. I tried this 

if the index is 1 and 2 the value should be both updated. but its not working as expected on my end only one can be updated.

Okay. I tried calling another forEach to update the 3rd index and it worked. Just wanna know if that's a good way to do that? 

Here

a!localVariables(
local!data: {
{ index: 1, name: "John", lastName: "Doe" },
{ index: 2, name: "Henry", lastName: "Doe" },
{ index: 3, name: "Jenny", lastName: "Doe" },
},
local!result: a!forEach(
items: local!data,
expression: if(
fv!index= 2,
updatedictionary(
fv!item,
{
name: "Jerome"
}
),
fv!item
)
),
a!forEach(
items: local!result,
expression: if(
fv!index= 3,
updatedictionary(
fv!item,
{
name: "Justine"
}
),
fv!item
)
)
)