nothrowCall

nothrowCall(func, args...)

Alias: nothrow

Calls a function with the specified parameters. The syntax is the same as call.

Unlike call, nothrowCall does not throw exceptions during execution, but it will throw an exception if the number of arguments does not match.

func is a function.

args are the required parameters of func.

The result depends on the return value of func(args).

When preparing the DolphinDB system environment, you need to clean up the environment, such as removing existing stream tables. However, it is sometimes unclear whether a given stream table exists. If dropStreamTable is called directly, an exception will be thrown when the table does not exist. In this case, nothrowCall can be used to ignore the exception.

The following example assumes that the stream table named orderData does not exist:

dropStreamTable(`orderData)
// Throw an exception: Can't find stream table orderData

nothrowCall(dropStreamTable, `orderData)
// The function runs without throwing an exception.

Related Function: call