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Re: Operator precedence

by sundialsvc4 (Abbot)
on Jan 14, 2013 at 03:08 UTC ( #1013150=note: print w/replies, xml ) Need Help??


in reply to Operator precedence

These two operators exhibit what is called short-circuit evaluation.   If the left-hand side of && is found to be False, the right-hand side is not evaluated at all, since to do so would be pointless:   “False and anything-at-all is already known to be False.”   Likewise, if the left-hand side of || is found to be True, then the right-hand side is not evaluated since what it’s got is already sufficient:   “True or anything-at-all is already known to be True.”

The computer had to evaluate apple to conclude if it was True or False.   (It was True.)   Since it was True, short-circuiting did not occur so it proceeded to its rightmost part.   But, having evaluated banana in the parenthesized expression (also True), that did short-circuit:   within that subexpression, it did not have to go further.   A call to cherry will never occur in this program fragment as-written.

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[Corion]: Discipulus: If you want to rewrite the SVG, then yes, something like XML::Twig should be enough. I would try to not modify the SVG but only modify the display, but so far I haven't convinced IE to change the style...
Corion gives up
[Discipulus]: ah! so you mean if i need a static image i can use Twig, if on the fly better css selector and mody attrs (jquery?), rigth?
[LanX]: not sure what you guys are taking about, but a DOM manipulation in JS shouldn't be difficult
[Corion]: Discipulus: Yeah, that's what I would try (but so far, I can't even change the colors manually in the SVG, which is why I gave up ;) )
Discipulus bad sign..
[Discipulus]: italian doc says to modify somehow the initial SVG before using it with D3.js
[Discipulus]: LanX the fact is that my js ability is even poorer than my Perl one..

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