Operator

Pipe Operator

A functional operator that allows chaining multiple filter operations together.

Usage

The pipe operator (|) enables sequential processing of filters, where the output of one filter becomes the input of the next filter.

Examples

# Basic pipe usage
42 | add(1) | mul(2)
# => 86

# Multiple transformations
let mul2 = def mul2(x): mul(x, 2);
let gt4 = def gt4(x): gt(x, 4);
array(1, 2, 3) | map(mul2) | filter(gt4)
# => [6]

# Function composition
let double = def _double(x): mul(x, 2);
let add_one = def _add_one(x): add(x, 1);
5 | double(self) | add_one(self)
# => 11

? Operator

The ? operator is a safe navigation operator that provides null-safe operations.

Usage

When applied to a None value, the ? operator prevents errors by returning None instead of raising an exception.

Examples

# Safe access with ? operator
let x = None | x | add(1)?
# => None

# Chaining with ? operator
None | add(1)? | mul(2)?
# => None

# Normal operation when value exists
42 | add(1)?
# => 43

.. Operator

The range operator (..) creates sequences of consecutive values between a start and end point.

Usage

The range operator generates arrays of values from a starting point to an ending point (inclusive). It works with both numeric values and characters.

Examples

# Numeric ranges
1..5
# => [1, 2, 3, 4, 5]

# Character ranges
'a'..'e'
# => ["a", "b", "c", "d", "e"]

# Using ranges with other operations
1..3 | map(fn(x): mul(x, 2);)
# => [2, 4, 6]

# Reverse ranges
5..1
# => [5, 4, 3, 2, 1]

# Single element range
3..3
# => [3]