#python #sicp
Function values each have a new annotation that we will include in environment
diagrams from now on, a parent. The parent of a function value is the first
frame of the environment in which that function was defined.
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1.6 Higher-Order Functionsc average(x, y) [parent=Global] func improve(update, close, guess) [parent=Global] func approx_eq(x, y, tolerance) [parent=Global] func sqrt(a) [parent=Global] func sqrt_update(x) [parent=f1] func sqrt_close(x) [parent=f1]
<span>Function values each have a new annotation that we will include in environment
diagrams from now on, a parent. The parent of a function value is the first
frame of the environment in which that function was defined. Functions without
parent annotations were defined in the global environment. When a user-defined
function is called, the frame created has the same parent as that function.
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