Function call_array_method 

pub fn call_array_method(
    arr: &mut Vec<Value>,
    method: &str,
    args: &[Value],
) -> GentResult<Value>

Call a method on an array value (non-lambda methods only)

Arguments

• arr - The array to call the method on (mutable for push/pop)
• method - The method name
• args - Arguments to the method

Supported Methods

• length() - Returns the number of elements
• push(value) - Adds an element to the end (mutates array)
• pop() - Removes and returns the last element (mutates array)
• indexOf(value) - Returns index of first occurrence, or -1
• join(separator) - Joins elements into a string
• slice(start, end) - Returns a new array with elements from start to end
• concat(other) - Returns a new array combining this and other