How can i edit an object in an array

[l4m2]

a=[0,0,0,0,0];a(0)=1;a returns still [0,0,0,0,0]

[Kilinich]

you could only re-create an array (or write function to do it).
also there is some tricks like this:

a := [0,0,0,0,0];
a = a * [1,1,0,1,1] + [0,0,1,0,0] * b

[l4m2]

you could only re-create an array (or write function to do it).
also there is some tricks like this:

a := [0,0,0,0,0];
a = a * [1,1,0,1,1] + [0,0,1,0,0] * b

Byt what if some other things(for example,strings) existed?
setv=(a,i,d){z="";for(string.length(a),(j)=>{z=z+(j>0?",":"")+(i==j?"d":"a("+j+")")});z}
is said Bad index in list.
Of course,if succeed we have to evaluate(eval) it.

[l4m2]

setv=(a,i,d)=>{z="[";for(string.length(a),(j)=>{z=z+(j>0?",":"")+(i==j?"d":"a("+j+")")});eval(z+"]")}
I mistook thyme again....