eighty-twenty rule - определение. Что такое eighty-twenty rule
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Что (кто) такое eighty-twenty rule - определение

SPECIES OF INSECT
Anna's Eighty-eight; Anna's eighty-eight

eighty-twenty rule      
<programming> The program-design version of the law of diminishing returns. The 80/20 rule says that roughly 80% of the problem can be solved with 20% of the effort that it would take to solve the whole problem. For example, parsing e-mail addresses in "From:" lines in e-mail messages is notoriously difficult if you follow the RFC 2822 specification. However, about 60% of actual "From:" lines are in the format "From: Their Name <user@host>", with a far more constrained idea of what can be in "user" or "host" than in RFC 2822. Another 25% just add double-quotes around "Their Name". Matching just those two patterns would thus cover 85% of "From:" lines, with a tiny portion of the code required to fully implement RFC2822. (Adding support for "From: user@host" and "From: user@host (Their Name) " brings coverage to almost 100%, leaving only really baroque things that RFC-2822 permits, like "From: Pete(A wonderful ) chap) < pete(his account)@silly.test(his host)" or the like.) It is an eternal question whether too much attention is paid to the 80/20 rule (leading to systems that are irrevocably broken for "unusual" cases), or too little (leading to systems that sacrifice usability in the typical case, just so that rare cases can work properly). Compare: KISS Principle (2003-11-17)
Zaitsev's rule         
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  • Alexander Mikhaylovich Zaitsev
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EMPIRICAL RULE PREDICTING THE MAJOR PRODUCT(S) IN ELIMINATION REACTION
Saytzeff's rule; Zaitsev's Rule; Zaitsev's product; Saytzeff rule; Saytzeff's Rule; Saytzev's rule; Zaytsev product; Saytzeff Rule; Zaitsev rule; Saytsev's rule; Saytsev rule
In organic chemistry, Zaitsev's rule (or Saytzeff's rule, Saytzev's rule) is an empirical rule for predicting the favored alkene product(s) in elimination reactions. While at the University of Kazan, Russian chemist Alexander Zaitsev studied a variety of different elimination reactions and observed a general trend in the resulting alkenes.
mail box rule         
RULE REGARDING ACCEPTANCE BY POST OF OFFERS IN ANGLO-AMERICAN CONTRACT LAW
Mail box rule; Postal acceptance rule; Postal rule; Postage rule; Deposited acceptance rule; Mailbox rule; Postal exception
n. in contract law, making a written offer or acceptance of offer valid if sent in the mail, with postage, within the time in which the offer must be accepted, unless the offer requires acceptance by personal delivery on or before the specified date. The rule may also apply to mailing payments of insurance premiums when due. However, relying on this so-called "rule" can be dangerous, since the party awaiting the acceptance or payment may cancel the offer if there is no response in hand when the time runs out.

Википедия

Diaethria anna

Diaethria anna, also known as Anna's eighty-eight, is a butterfly in wet tropical forests in Middle America. On rare occasions, it can be found as a stray in south Texas. Its upperside is dark brown with a metallic bluish-green band on the forewings. The underside of the forewings are red, which is followed by a wide, black band and then white tips; the underside of the hindwings is white, with lines that approximate a black-outlined "88", giving the species its common name. Its markings occasionally appear more like of "98" or "89".

The caterpillars feed on tropical plants in the families Ulmaceae and Sapindaceae. Adults feed on rotting fruit and dung.

Subspecies are:

  • Diaethria anna anna
  • Diaethria anna salvadorensis