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Low-level Operations on Java Arrays
The following macros evaluate to procedures that can be used to
manipulate primitive Java array objects.
The compiler can inline each to a single bytecode instruction
(not counting type conversion).
primitive-array-new element-type
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Syntax |
Evaluates to a one-argument procedure. Applying the resulting procedure to
an integer count allocates a new Java array of the specified length,
and whose elements have type element-type.
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primitive-array-set element-type
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Syntax |
Evaluates to a three-argument procedure. The first argument of
the resulting procedure must be an array whose elements have type
element-type; the second argument is an index; and the third
argument is a value (coercible to element-type) which replaces
the value specified by the index in the given array.
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primitive-array-get element-type
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Syntax |
Evaluates to a two-argument procedure. The first argument of
the resulting procedure must be an array whose elements have type
element-type; the second argument is an index.
Applying the procedure returns the element at the specified index.
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primitive-array-length element-type
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Syntax |
Evaluates to a one-argument procedure. The argument of
the resulting procedure must be an array whose elements have type
element-type.
Applying the procedure returns the length of the array.
(Alternatively, you can use (field array 'length) .)
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