Comments on: SICP sections 3.1.2 - 3.1.3 http://eli.thegreenplace.net/2007/09/27/sicp-sections-312-313/ Eli Bendersky's personal website Fri, 21 Nov 2008 18:12:12 +0000 http://wordpress.org/?v=2.6.2 By: eliben http://eli.thegreenplace.net/2007/09/27/sicp-sections-312-313/#comment-128239 eliben Thu, 28 Aug 2008 16:02:19 +0000 http://eli.thegreenplace.net/2007/09/27/sicp-sections-312-313/#comment-128239 I guess that if one reads the small print of the contract, you're right. But I think my solution is good enough, as it provides the required protection, and does so in a much more elegant manner than the solution to the original requirement leads to. I guess that if one reads the small print of the contract, you’re right. But I think my solution is good enough, as it provides the required protection, and does so in a much more elegant manner than the solution to the original requirement leads to.

]]> By: Jason http://eli.thegreenplace.net/2007/09/27/sicp-sections-312-313/#comment-127858 Jason Mon, 25 Aug 2008 22:56:39 +0000 http://eli.thegreenplace.net/2007/09/27/sicp-sections-312-313/#comment-127858 I think you are missing an requirement here for Exercise 3.7: "Define a procedure make-joint that accomplishes this. Make-joint should take three arguments. The first is a password-protected account. The second argument must match the password with which the account was defined in order for the make-joint operation to proceed." The questions asks to signal an indication that the make-joint was not successful due to an incorrect acc-pass, yours only fail when the joint account try to withdraw money. I think you are missing an requirement here for Exercise 3.7: “Define a procedure make-joint that accomplishes this. Make-joint should take three arguments. The first is a password-protected account. The second argument must match the password with which the account was defined in order for the make-joint operation to proceed.”

The questions asks to signal an indication that the make-joint was not successful due to an incorrect acc-pass, yours only fail when the joint account try to withdraw money.

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