Check If Exists¶
Description¶
This operation verifies if a specific key exists in the specified map.
Method¶
Backendless.Hive(hiveName).MapStore(keyName).keyExists(objKey);
where:
| Argument | Description |
|---|---|
hiveName |
Name of a hive where the operation is performed. String value. |
keyName |
Key name identifying a map. String value. |
objKey |
Key name identifying a key-value pair to check if it exists. String value. |
Return Value¶
true if an object exists. Otherwise, returns false.
Example¶
The example below checks if the "Oranges" key exists in the "fruits" map.
Backendless.Hive("groceryStore").MapStore("fruits").keyExists("Oranges");
where:
| Argument | Description |
|---|---|
"groceryStore" |
Name of a hive where the operation is performed. |
"fruits" |
Key name identifying a map. |
Codeless Reference
¶
where:
| Argument | Description |
|---|---|
hive name |
Name of a hive where the operation is performed. |
key name |
Key name identifying a map. |
object key name |
Key name identifying a key-value pair. |
Returns true if an object exists. Otherwise, returns false.
Consider the following Map storage:
The example below checks if a key-value pair with the key name "Oranges" exists in the "fruits" map.
The logic produces the following output:
