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Table |
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Given
? pragma.syntax("0.8") ? def colors := ["red", "green", "blue"] # value: ["red", "green", "blue"] ? def hw := "hello world" # value: "hello world" ? def vice := ["bush" => "quayle", "clinton" => "gore"] # value: ["bush" => "quayle", "clinton" => "gore"]
Messages Shared with all Tables
Since these messages are shared between Const and Flex tables, they must be query only. As applied to a Flex table, they operate of the state of the table at that instant.
Since they are shared between lists and maps, they must be have a common meaning, whether an index is used with a list, or a key is used with a map.
Indexing
| Example | Meaning | Expansion | Value |
|---|---|---|---|
colors[2] |
Indexing. Retrieves element #2 (the third element) |
colors.get(2) |
"blue" |
hw[2] |
hw.get(2) |
'l' |
|
vice["bush"] |
Lookup. This key maps to what value? |
vice.get("bush") |
"quayle" |
Containment
| Example | Meaning | Value |
|---|---|---|
colors.contains("green") colors.contains("orange") |
Is this an element of the list? |
true false |
hw.contains('w')
hw.contains('z')
|
true false |
|
vice.contains("quayle") vice.contains("clinton") |
Is this a value of the list? |
true false |
Since "vice" maps presidents to their vice presidents, "clinton" is a key of the list (since he was a president), but is not present as a value (since he was never a vice president).
Size
| Example | Meaning | Value |
|---|---|---|
colors.size() |
How many elements are in the list? |
3 |
hw.size() |
11 |
|
vice.size() |
How many keys are in the list? |
2 |
Iteration
xxx Crap below this point
| Example | Meaning | Expansion | Value |
|---|---|---|---|
list[2] |
Indexing. Retrieves element #2 (the third element) |
list.get(2) |
42 |
[3] == [] |
Are they the same? | __equalizer.sameEver([3], []) |
false |
[3] != [] |
Are they different? | __equalizer.sameEver([3], []).not() |
true |
Dealing with Change
| Example | Value |
|---|---|
colors.snapshot() hw.snapshot() vice.snapshot() |
A Const* with a snapshot of the state at this time |
| Example | Value |
|---|---|
colors.readOnly() hw.readOnly() vice.readOnly() |
A read-only facet for querying the current state |
| Example | Value |
|---|---|
colors.diverge() hw.diverge() vice.diverge() |
A Flex* whose initial state is a snapshot of the state at this time |
Unless stated otherwise, all text on this page which is either unattributed or by Mark S. Miller is hereby placed in the public domain.
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