copapy.iif#

copapy.iif(expression, true_result, false_result)#

Inline if-else operation. Returns true_result if expression is non-zero, else returns false_result.

Overloads:

  • expression (value[Any]), true_result (value[int] | int), false_result (value[int] | int) → value[int]

  • expression (value[Any]), true_result (value[float] | float), false_result (value[float] | float) → value[float]

  • expression (float | int), true_result (TNum), false_result (TNum) → TNum

  • expression (float | int), true_result (TNum | value[TNum]), false_result (value[TNum]) → value[TNum]

  • expression (float | int), true_result (value[TNum]), false_result (TNum | value[TNum]) → value[TNum]

  • expression (float | int | value[Any]), true_result (TNum | value[TNum]), false_result (TNum | value[TNum]) → value[TNum] | TNum

  • expression (float | int | value[Any]), true_result (TContainer), false_result (Any) → TContainer

  • expression (float | int | value[Any]), true_result (Any), false_result (TContainer) → TContainer

Both results are computed if expression is not known at trace time. The selection is done without a branching. The result is exact and inf or nan in the result that is not selected have no effect.

Vectors, tensors and arrays as results are selected as a whole by the scalar expression. They are blended by multiplications with 1 and 0 (array stencils for arrays and packed vectors or tensors): inf or nan in an element of the result that is not selected gives nan.

Parameters:

  • expression (Any) – The condition to evaluate: a number or copapy value.

  • true_result (Any) – The result if expression is non-zero.

  • false_result (Any) – The result if expression is zero.

Returns:

The selected result based on the evaluation of expression.

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