traitとは意味・読み方・使い方

発音

• enPR: trāt, IPA^(key): /tɹeɪt/
  • (traditional British pronunciation, now virtually 廃れた用法) enPR: trā, IPA^(key): /tɹeɪ/
  • 韻: -eɪt, -eɪ
  • 異形同音異義語: tray, trey (one pronunciation)

名詞

trait (複数形 traits)

1. (biology, psychology) An identifying characteristic, habit or trend.

   Synonym: characteristic

   • 1856, Ralph Waldo Emerson, English Traits, Truth:

     The English, of all classes, value themselves on this trait, as distinguishing them from the French, who, in the popular belief, are more polite than true.

   • 1916, John Dewey, Democracy and Education:

     The positive and constructive aspect of possibility gives the key to understanding the two chief traits of immaturity, dependence and plasticity.

   • 2003, Robert S. Siegler, Judy S. DeLoache, Nancy Eisenberg, How Children Develop, Macmillan (→ISBN), page 89:

     Turning to our second trait, if you have straight hair, then both of your parents must carry an allele for this trait.

   The number one personality trait I hate is hypocrisy. Why can't you be consistent!?

2. (object-oriented programming) An uninstantiable collection of methods that provides functionality to a class by using the class’s own interface.

   Coordinate terms: mixin, interface, class

   Traits are somewhat between an interface and a mixin.

   • 2006, Nathaniel J. Nystrom, Programming languages for scalable software extension and composition‎^[1]:

     Traits are parametrized on other methods, which must be provided to create a class using the trait. Using a trait-like mechanism to compose large collections of mutually-dependent classes or traits could lead to parameter explosion.

派生語

• character trait
• traitlike

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