From Jonathan Gardner's Tech Wiki
[edit] Built-In Functions
(funcall #'func-name param1 param2 ...)
| Calls the function as if (func-name param1 param2 ...). When you know the number of params, use this.
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(apply #'func-name params)
| Calls the function as if (func-name param1 param2 ...). When you don't know the number of params, use this.
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[edit] Math Functions
| = | Tests that all the items are numerically equal, or that none are unequal.
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| /= | Tests that all the items are numerically unequal, or that none are equal.
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| <, >, <=, >= | Tests that Compares each item with its neighbor, one at a time.
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| min, max | Returns the min/max value.
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| LOG, EXP, EXPT, SIN, COS, TAN, ASIN, ACOS, ATAN, SINH, COSH, TANH, ASINH, ACOSH, ATANH
| Higher-level functions
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[edit] String Functions
| CHAR=, CHAR/=, CHAR<, CHAR>, CHAR<=, CHAR>=
| Case-sensitive compare, single char
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| CHAR-EQUAL, CHAR-NOT-EQUAL, CHAR-LESSP, CHAR-GREATERP, CHAR-NOT-GREATERP, CHAR-NOT-LESSP
| Case-insensitive compare, single char
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| STRING=, STRING/=, STRING<, STRING>, STRING<=, STRING>=
| Case-sensitive compare, many chars
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| STRING-EQUAL, STRING-NOT-EQUAL, STRING-LESSP, STRING-GREATERP, STRING-NOT-GREATERP, STRING-NOT-LESSP
| Case-insensitive compare, many chars
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[edit] Logical Operations
[edit] True and False
Only NIL is false. Everything else is true. T is also true.
[edit] Equality Tests
- = : Compare numbers
- CHAR= : Compare single characters
- etc...
- EQ : Object identity test. Note: (EQ 3 3) may fail, depending on the implementation. Even (EQ x x) may fail if x is a number or character.
- EQL : Compares class and values. (EQL 3 3) is true but (EQL 3 3.0) is false. Recommendation: NEVER USE EQ.
- EQUAL : Compares recursively with EQUAL, falling back to EQL when an EQUAL isn't available.
- EQUALP: Like EQUAL, and falls back to EQL, but for many types it will detect mathematical equivalence. For instance (EQUALP 1 1.0) is true.
