## Module Overview

This module provides lang library operations on `table` values defined by the language specification 2020R1.

Applies a function each member of a table and returns a table of the result.



'map

table<Type> 

func

Type

Type1

new table containing result of applying function `func` to each member


table<Type1> key<never> 

Adds a member `val` to table `t`.
It will be added as the last member.
It panics if `val` has the same key as an existing member of `t`,
or if `val` is inconsistent with the inherent type of `t`.



Selects the members from a table for which a function returns true.
The resulting table will have the same keys as the argument table.



filter

table<Type> key<KeyType> 

a predicate to apply to each member to test whether it should be included


boolean

new table containing members for which `func` evaluates to true


Applies a function to each member of a table.
The function `func` is applied to each member of `t`.



forEach

Returns the member of table `t` with key `k`.
This for use in a case where it is known that the table has a specific key,
and accordingly panics if `t` does not have a member with key `k`.



KeyType

Tests whether `t` has a member with key `k`.



hasKey

Returns an iterator over a table.
The iterator will iterate over the members of the table not the keys.
The `entries` function can be used to iterate over the keys and members together.
The `keys` function can be used to iterator over just the keys.



iterator

a new iterator object that will iterate over the members of `t`


object {
    public isolated function next() returns record {|
        Type value;
    |}?;
} 

Returns a list of all the keys of table `t`.



keys

table<any|error> key<KeyType> 

length

table<any|error> 

nextKey

table<any|error> key<int> 

an integer not yet used as a key
This is maximum used key value + 1, or 0 if no key used
XXX should it be 0, if the maximum used key value is < 0?
Provides similar functionality to auto-increment


Adds a member `val` to table `t`, replacing any member with the same key value.
If `val` replaces an existing member, it will have the same position
in the order of the members as the existing member;
otherwise, it will be added as the last member.
It panics if `val` is inconsistent with the inherent type of `t`.



Combines the members of a table using a combining function.
The combining function takes the combined value so far and a member of the table,
and returns a new combined value.



reduce

initial value for the first argument of combining function `func`


initial

result of combining the members of `t` using `func`


remove

the member of `t` that had key `k`
This removed the member of `t` with key `k` and returns it.
It panics if there is no such member.


Removes all members of a table.
This panics if any member cannot be removed.



removeAll

Removes a member of a table with a given key, if the table has member with the key.



removeIfHasKey

the member of `t` that had key `k`, or `()` if `t` does not have a key `k`
If `t` has a member with key `k`, it removes and returns it;
otherwise it returns `()`.


Returns a list of all the members of a table.



toArray

an array whose members are the members of `t`


This module provides lang library operations on "table" values defined by the language specification 2020R1.

A type parameter that is a subtype of `any|error`.
Has the special semantic that when used in a declaration
all uses in the declaration must refer to same type.


error

lang.table

Applies a function each member of a table and returns a table of the result.

Selects the members from a table for which a function returns true.

Applies a function to each member of a table.

Returns the member of table `t` with key `k`.

Tests whether `t` has a member with key `k`.

Returns a list of all the keys of table `t`.

Adds a member `val` to table `t`, replacing any member with the same key value.

Combines the members of a table using a combining function.

Removes a member of a table with a given key, if the table has member with the key.

Returns a list of all the members of a table.

A type parameter that is a subtype of `any|error`.

ballerina/lang.table0.4.0

Module Overview

Functions

Types

'map	Applies a function each member of a table and returns a table of the result.
add	Adds a member `val` to table `t`.
filter	Selects the members from a table for which a function returns true.
forEach	Applies a function to each member of a table.
get	Returns the member of table `t` with key `k`.
hasKey	Tests whether `t` has a member with key `k`.
iterator	Returns an iterator over a table.
keys	Returns a list of all the keys of table `t`.
length	Returns number of members of a table.
nextKey	Returns the next available integer key.
put	Adds a member `val` to table `t`, replacing any member with the same key value.
reduce	Combines the members of a table using a combining function.
remove	Removes a member of a table.
removeAll	Removes all members of a table.
removeIfHasKey	Removes a member of a table with a given key, if the table has member with the key.
toArray	Returns a list of all the members of a table.