This topic describes the syntax, description, parameters, and response parameters of dictionary functions. This topic also provides examples of these functions.
set
Sets key-value pairs in a dictionary specified by the d parameter. The following table
describes the details about this function.
Item | Description |
---|---|
Syntax | set(d, k, v) |
Parameters |
|
Examples |
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Response parameters | Returns a value of true. Response parameters of Example 1 and Example 2:
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get
Retrieves the value (v) that corresponds to a key (k) from a dictionary (d). The following
table describes the details about this function.
Item | Description |
---|---|
Syntax | get(d, k) |
Parameters |
|
Examples |
|
Response parameters | If the function succeeds, the value that corresponds to the specified key is returned.
Otherwise, a value of false is returned. Response parameters of this example:
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foreach
Details about this function:
- Traverses elements in a dictionary (d) and calls a callback function (f) for each element.
- Specify the f parameter in the syntax of
f(key, value, user_data)
. - When the
f()
function returns false, theforeach()
loop ends.
Item | Description |
---|---|
Syntax | foreach(d, f, user_data) |
Parameters |
|
Examples |
|
Response parameters | Returns a value of true. Response parameters of Example 1 and Example 2:
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del
Deletes key-value pairs from a dictionary (d). The following tables describes the
details about this function.
Item | Description |
---|---|
Syntax | del(d, k) |
Parameters |
|
Examples |
|
Response parameters | Returns a value of true. Response parameter for this example:
|