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xiaq/elvish-0.5-breaking-changes.md

Last active October 11, 2016 23:20
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Breaking changes in elvish 0.5
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elvish-0.5-breaking-changes.md

  • The println builtin is now known as echo.

  • The == builtin now compares numbers -- == 1 1.0 is true, while == a a throws an exception. To compare strings, use ==s. It is part of a family of new builtins for comparing strings, <s, <=s, ==s, !=s, >s and >=s.

  • The is builtin is the new generic (shallow) equality predicate. The deep equality predicate deepeq is now known simply as eq.

  • Automatic use'ing has been removed. All modules must be used before use.

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