Gordon Weakliem writes about literal hash-table syntax, and touches on some of the problems that programmers run in to with floating-point numbers. He writes:
12 years ago, I spent half a day in the debugger trying to figure out why the computer would not believe that 0.0 == 0.0 […]
This triggered two thoughts:
floating-point numbers in GUIs should be represented differently depending on whether they are an exact representation or an inexact one - which might have saved Gordon’s 12 hours. For instance, inexact representations could be a slightly different shade from exact representations, making the hidden difference between the two zeros apparent at a glance; and
programming languages must provide reflective access to the representation of floating point numbers, if they are used. As a programmer, I must be able to access the exact bit sequence used to represent the sign, mantissa and exponent of the float.