© Tyl Software Foundation 2019-2021
▶ ACCESS & EDIT RECORDS
Adding/Removing Scalar Keys
To add a scalar key to a record:
product <- 'price' 10.0
price property is added to product, and its value will be 10.0.
The value can be omitted:
product <- 'price'
In this case, the value will be NULL.
price key can be accessed and edited by the dot notation:
product { cat 'Electrical' name 'LED Light Bulb' }
product <- 'price' 10.0
print 'assigned price = ' + product.price
product.price 20
print 'updated price = ' + product.price
assigned price = 10
updated price = 20
updated price = 20
Alternatively, you can have a scalar variable as the property name:
product { cat 'Electrical' name 'LED Light Bulb' }
key 'price'
product <- key 10.0
print 'assigned ' + key + ' = ' + product key
assigned price = 10
Accessing a peoperty that was added with scalar variable,
is done dynamically only.
Removing a key is done by appending the remove item code '->', to the dynamic access statement:
Removing a key is done by appending the remove item code '->', to the dynamic access statement:
product 'price' ->
price key is removed from product, and its value is
returned.
Note that in remove item statements, the access statement must be dynamic.
Consider this program:
product { cat 'Electrical' name 'LED Light Bulb' }
print product
product <- 'price' 10.0
print product
removedprice product 'price' ->
print product
print
print 'removed price: ' + removedprice
{
cat: 'Electrical'
name: 'LED Light Bulb'
}
{
cat: 'Electrical'
name: 'LED Light Bulb'
price: 10
}
{
cat: 'Electrical'
name: 'LED Light Bulb'
}
removed price: 10
cat: 'Electrical'
name: 'LED Light Bulb'
}
{
cat: 'Electrical'
name: 'LED Light Bulb'
price: 10
}
{
cat: 'Electrical'
name: 'LED Light Bulb'
}
removed price: 10
In line '
removedprice product 'price' ->', removedprice gets the value of the item that
is being removed from product.
Editing Scalar Keys
Editing a record is done by appending the value statement to the
record access statement:
product.name 'Fluorescent Light Bulb'
In line
Other options to edit a record:
product.name 'Fluorescent Light Bulb', product.name is the
access statement, and it will be set to 'Fluorescent Light Bulb'.
Other options to edit a record:
product 'name' 'Fluorescent Light Bulb'
key 'name'
value 'Fluorescent Light Bulb'
product key value
values 'LED Light Bulb', 'Fluorescent Light Bulb'
product key values 1
In all these record edit statements,
product name property will be set to
'Fluorescent Light Bulb'. In line product key values 1, the section values 1,
is the value statement,
so the second item of values list will be the new value of product name.