© Tyl Software Foundation 2019-2021
▶ LIST ASSIGNMENT
Assign a List by Another List
First examples will be with lists that end with plural ending:
as 1 2
ds as
print ds
[ 1, 2 ]
ds is declared and assigned by as in the same statement. Upon assignment,
ds gets all data from as.
ds is not connected to as by any reference, so any changes in one
of them will not affect the other.
Accessing a list that is an item of another list by assignment:
as 1 2
ds <- as
print ds
print as ds 0
print as 0
[ [ 1, 2 ] ]
[ 1, 2 ]
1
[ 1, 2 ]
1
In line
To edit list item of list:
ds <- as, as list is added to ds as its first item. To modify that
item it is needed to assign it to another list. In line as ds 0, the first
item of ds, which is a list is assigned to as list. Now as 0, will be the
first item of the first item of ds.
To edit list item of list:
as 1 2
ds <- as
ds <- as
print ds
ms 3 4
ds 1 ms
as ds 0
as 0 10
ds 0 as
print ds
[ [ 1, 2 ], [ 1, 2 ] ]
[ [ 10, 2 ], [ 3, 4 ] ]
[ [ 10, 2 ], [ 3, 4 ] ]
The second item of
The above code with non plural ending variables and square barckets:
ds was changed to ms. As before, to edit a list item that
is a list, as was assigned by ds 0, then after setting as, ds 0 was
assigned the updated as.
The above code with non plural ending variables and square barckets:
adata [ 1 2 ]
ddata [ ]
ddata <- adata
ddata <- adata
print ddata
mdata [ 3 4 ]
ddata 1 mdata
adata ddata 0
adata 0 10
ddata 0 adata
print ddata
All list variables are in declaration lines, and their declaration items are
decorated with square brackets, prior to using them in subsequent
list operations.