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Diffstat (limited to 'sicp.org')
-rw-r--r-- | sicp.org | 11 |
1 files changed, 11 insertions, 0 deletions
@@ -46,3 +46,14 @@ order*, the expression will be expanded to #+END_SRC and will evaluate to ~0~. +*** 6 + If I've understood it correctly, scheme uses applicative-order + evaluation, meaning, it evaluates the operands before appling the + procedure. + + In the case when ~new-if~ used in the ~sqrt-iter~ procedure, the + operands/arguments for the ~new-if~ -- ~(good-enough? guess x)~, + ~guess~, ~(sqrt-iter (improve guess x) x)~ -- are evaluated. Due + to the last operand, which is a call to the ~sqrt-iter~ procedure, + we get into infinite loop of evaluating the ~sqrt-iter~ procedure + again and again. |