containers
:container
containers
none
none
A colon : indicates a container, with the name of the word following the colon. turtleSpaces ‘resolves’ a :container ‘tag’ into the value of that container when an instruction is executed, such that if the value of :container is 5, then forward :container becomes ‘resolved’ to forward 5, before the instruction is executed.
show :container
:=
containers
expression | expression
none
Assigns the value of the second expression to the container name resolved by the first expression. See make for more details
So, for example, "frog := 5 puts the value 5 in the container named frog. However, :frog := 5 puts the value of 5 in the container named whatever is inside the container named frog.
"frog := "duck
:frog = 5
show :duck
5
buryname
containers
name or [list]
none
Buries the provided container names.
buryname "container
dequeue
containers
container
item
Similar to pop, except removes the item from the end of the list. See pop
show dequeue "container
edn
containers
containername (word)
none
Inserts a make statement into the prompt containing the specified container name and its contents for editing.
edn "container
edns
containers
containername(s) (list)
none
Opens the editor with a list of the provided containers and their contents, which are updated when the editor is exited.
edns [container1 container2]
eraselocal
containers
container (word)
none
Erases the named local container. See local
erase "localcontainer
erasename ern
containers
container (word)
none
Erases the name off of a specified container (unallocating it), and empties its contents.
erasename "mycontainer
erasenames erns
containers
none
none
Erases the names off of all the containers held by the turtle that calls it, and empties their contents
erasenames
eraseprivate
containers
container (word)
none
Erases the named private container. See private
eraseprivate "privatecontainer
eraseshare
containers
container (word)
none
Erases the specified shared container.
eraseshare "sharedcontainer
eraseshares
containers
none
none
Erases all shared containers and their contents.
erprops
containers
none
none
Erases all property lists.
erprops
get
containers
surname | container
value
Returns the value of the specified container under the given surname. See setsurname, set
show get "jones "car
camry
gprop
containers
name | property
value
Returns the value of the property in the named property list. See plist
show gprop "john "phone
in
containers
anything
anything
in simply passes whatever is passed to it. It is useful in two main contexts: first, to improve the readability of the make alternative put, as in put 5 in “container; second, to retrieve the value of another turtle’s container using query, as in query “myrtle [in :container].
pr query speedy [in :suspensions]
inc
containers
name (word)
none
Increments the contents of the named container by one. Has no effect if the value of the container is not a number.
show "container
4
inc "container
show "container
5
local
containers
word or list
none
Changes the scope of the container(s) specified by the supplied word or list to local – that is, they are only accessible by the current procedure, and only while it is executing. To preserve the state of the container when the procedure is not executing, use private. See make
local "container
local [container1 container2]
make
containers
name (word) | word, list, evaluated-list, expression or number
names (list) | list of words, numbers or lists
none
Make creates a container (also known as a container) with the name specified by the first parameter, containing the item(s) specified or generated by the second parameter. It also works with lists of both the former and the latter (see examples), but if you want to assign the returns from advisers you will need to use a softlist {}. See name and put
make "container 5
print container
5
make "container [dog pig cow]
show "container
[dog pig cow]
make [ducks frogs pigs] [4 3 1]
show :ducks
4
show :frogs
3
make [x y z] {xpos ypos zpos}
make!
containers
name (word) | expression
Contains a runtime-evaluated expression, or ‘mutated’ container. This allow expressions to be stored inside containers, and rather than being evaluated when stored, they are evaluated when recalled. A container that contains a REX may only contain a single REX and nothing else. See also name! and put!
make! “moo iterate (array 1 + random 10) [“moo]
pr :moo
make! "clock (se hours minutes seconds)
pr :clock
name
containers
number, word, longword, list, expression or container | name (word)
none
An alternative to make. Traditionally used for constants, eg name 3.14 “pi. See make, put
name 3.14 "pi
name!
containers
expression | name (word)
none
Creates a mutated container, one whose expression is re-evaluated whenever it is accessed. See make!
name! (se hours minutes seconds) "clock
names
containers
none
list
Returns a list of the defined containers (their names).
show names
plist
containers
propertylistname (word)
propertylist (list)
Outputs the property list associated with the supplied name. Any word can have a property list associated with it – a list of ‘properties’ and their values. plist returns a list of these pairs sequentially: [property1 value1 property2 value2 etc.] See pprop
show plist "propertylist
pon
containers
container(s) (word or list)
none
Prints out the name and value of the named container(s)
pon "container
pons
containers
none
none
Prints out the names and values of every container in the workspace.
pons
pop
containers
container
item
‘Pops’ the item at the front of the container and returns it, removing it from the contained word or list. Equivalent to: make “pop first :list make “list butfirst :list
See push
make "result pop "pushlist
pprop
containers
name | property | value
none
Property lists are a special type of container that hold multiple property / value pairs. You can have a property list and a non-property list container with the same name.
pprop "addresses [Marty McFly] [9303 Lyon Drive, Lyon Estates, Hill Valley CA 95420]
pps
containers
none
none
Prints the property list containers belonging to the calling turtle.
pps
private
containers
word
none
Initialises a private container with the name provided. A private container is a container which only exists and whose value persists inside of a procedure. This allows you to construct a procedure that modifies and stores internal parameters without losing them when that procedure exits, and needing to store them in the turtle. See the examples.
TO test
if not namep "frog [private "frog make "frog 1 stop]
inc "frog
show :frog
END
TO test :switch
private "var
if :switch = "a [make "var 1]
if :switch = "b [inc "var show :var]
END
put
containers
input (number, word, longword, list, primitive or container) | in | name (word)
none
Another syntax for make used by some Logos. ‘in’ is a simple prmitive that forwards whatever is passed to it. See in
put 5 in "counter
put!
containers
expression | in | name (word)
See make!
put! (se hours minutes seconds) in “clock
push
containers
item | container
none
“Pushes” the item on to the front of the specified container, making it the first item, and pushing the rest of the items to the right. If the container contains a word, push pushes the item on to the start of the word. If the container contains a list, push pushes the item on to the front of the list. To pull the item out of the container, use pop. Also see queue and dequeue (which do similar but to the end of the container).
push "frog "animals
queue
containers
item | container
none
Similar to push, except adds the provided item to the end of the container, appending it to the word or list inside it. See push
queue "item "container
remprop
containers
name | property
none
Removes the given property from the named property list.
remprop "proplist "property
rename
containers
oldname | newname
Renames a container.
rename “oldname “newname
set
containers
surname | container | value
none
Sets the contents of the named container in the named surname to the provided value. See setsurname, surname, get
set "jones "car "camry
setsurname
“surname
none
Used to select the ‘surname’, otherwise more commonly known as the ‘container space’, to use. All the containers (or variables) in turtleSpace have a surname, or family they belong to. Changing the surname allows you to use code containing single-dimension containers in different contexts (for example, different players) without having to modify it. You just set a different surname and run the code again. The default surname is “default
setsurname “player1
make "score 5
setsurname "player2
make "score 10
setsurname "player1
print :score
5
setvar
containers
turtle (word) | container (word) | value (word, number, list or boolean)
none
Changes the contents of the container held by the specified turtle to the specified value. Technically bad form, but sometimes necessary.
setvar "myrtle "container 50
share
“name
none
Indicates that the container “name should be shared amongst all turtles.
share “lives
surname
containers
none
namespace (word)
Returns the surname of the current container (name) space. The default surname is ‘default’. See setsurname.
print surname
default
swap
containers
container1 (word) | container2 (word)
none
Exchanges the contents of two containers. Note that the name of the container is specified as a word, eg “container. See make
swap "container1 "container2
thing
containers
containername (word)
output
Returns the contents of (the ‘thing’ in) the container of the provided container name. A longhand way of invoking the shortcut :container
show thing in "mycontainer
make "mycontainer thing in "mycontainer + 5
unburyname
containers
word or list
none
Unburies the container(s) named in its input. See bury
unburyname "container
unshare
containers
name (word) or names (list)
none
Unlike eraseshare which erases the share and its container, unshare changes the share back into a ‘global’ (turtle-internal) container.
unshare "container