Infix Notation
This type of notation is referred to as infix since the operator is in between the two operands that it is working on.
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Functions as Values
In other words, lambdas become useful when you want to pass functions as arguments to other functions, or return a function from a function.
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Lambdas Function
DataWeave provides multiple ways to create functions. Just like we have named functions, we have functions without names, called lambdas.
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Named Functions
We create functions in the declarations section of the script using the fun keyword. This associates a set of functionality with a name.
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Functions in DataWeave 2.0
You can define your own DataWeave functions using the fun declaration in the header of a DataWeave script.
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Pattern Matching with Literal Values
A match expression contains a list of case statements that can optionally have an else statement. Each case statement consists of a conditional selector expression that must evaluate to either true or false.
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do statement in flow control (DataWeave 2.0)
A do statement creates a scope in which new variables, functions, annotations, or namespaces can be declared and used.
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else if Condition in flow (DataWeave 2.0)
You can chain several else expressions together within an if-else construct by incorporating else if.
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if else Condition in Flow Control (DataWeave 2.0)
An if statement evaluates a conditional expression and returns the value under the if only if the conditional expression returns true. Otherwise, it returns the expression under else. Every if expression must have a matching else expression.
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Flow Control
Flow control is used when you want to execute certain parts of your code in some situations, while not executing others.
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