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ABENSTRING_CONCATENATION_ABEXA - STRING CONCATENATION ABEXA

- Concatenating Strings

This example demonstrates how string concatenations can be optimized.

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Description

This example demonstrates the optimization of a string concatenation, if a string is lengthened on the right side by appending content during an assignment to a string. In this case, the strings are processed in a loop using a REDUCE expression.

• There is no optimization in the first REDUCE expression since an expression is appended to the string s.

• In the second REDUCE expression, the expression is assigned to a helper variable num using LET. This variable can be appended to s directly without an interim result needing to be produced.

Without optimization, the runtime increases quadratically with the number of iterations, which has a noticeable effect for large numbers n.