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forget
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Calling Sequence
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forget( f, opts )
forget( f, a, b, c, ..., opts )
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Parameters
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f
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procedure or module; the object to forget
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a, b, c, ...
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(optional) specific argument sequence for f
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opts
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options of the form keyword = true or false, where keyword is one of subfunctions, forgetpermanent or reinitialize
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Description
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The forget function is used to clear remember tables of procedures. Its precise action is controlled by the options given, whether f is a procedure or a module, and whether the remember table(s) in question is a pure remember table or a cache table.
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subfunctions = true or false (default: true)
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If true, this causes forget(f) to also forget procedures related to f. If f is a module, this means all procedures in the module, including procedures in submodules. If f is a procedure which is not in a module, this means all procedures whose name is of the form f/.... If subfunctions=false and f is a an appliable module, only the remember table associated to the ModuleApply member of f is cleared. If subfunctions=false and f is a procedure which is not a module member, only the remember table associated to f itself is cleared. This option is ignored in the case when f is a procedure which is a module member.
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forgetpermanent = true or false (default: false)
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If true then permanent entries in cache-based remember tables are also removed. If not given, or given as forgetpermanent=false, only temporary entries in cache-based remember tables are cleared. This option is ignored for non-cache-based remember tables.
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reinitialize = true or false (default: true)
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This option only applies to the case when f is a procedure which is not a member of a module. In this case, if reinitialize=true, the corresponding procedure f is completely discarded and reloaded from its Maple archive, causing its remember table to be restored to its initial state.
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forget(f, a, b, c, ..., opts) restricts the action of forget to clearing only remember table entry(s) indexed by the argument list [a, b, c, ...], and subject to the interpretations implied by the options in opts.
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Examples
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![Cache(512, 'temporary' = [-x = -sin(x), x = sin(x)], 'permanent' = [0 = 0, (1/6)*Pi = 1/2, I = I*sinh(1), (1/4)*Pi = (1/2)*2^(1/2), Pi = 0, infinity = undefined, -infinity = undefined, (1/2)*Pi = 1, (1/3)*Pi = (1/2)*3^(1/2)])](/support/helpjp/helpview.aspx?si=6523/file00294/math235.png)
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![Cache(512, 'temporary' = [-x = -sin(x)], 'permanent' = [0 = 0, (1/6)*Pi = 1/2, I = I*sinh(1), (1/4)*Pi = (1/2)*2^(1/2), Pi = 0, infinity = undefined, -infinity = undefined, (1/2)*Pi = 1, (1/3)*Pi = (1/2)*3^(1/2)])](/support/helpjp/helpview.aspx?si=6523/file00294/math246.png)
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![Cache(512, 'permanent' = [0 = 0, (1/6)*Pi = 1/2, I = I*sinh(1), (1/4)*Pi = (1/2)*2^(1/2), Pi = 0, infinity = undefined, -infinity = undefined, (1/2)*Pi = 1, (1/3)*Pi = (1/2)*3^(1/2)])](/support/helpjp/helpview.aspx?si=6523/file00294/math257.png)
| (4) |
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![Cache(512, 'permanent' = [0 = 0, (1/6)*Pi = 1/2, I = I*sinh(1), (1/4)*Pi = (1/2)*2^(1/2), Pi = 0, infinity = undefined, -infinity = undefined, (1/2)*Pi = 1, (1/3)*Pi = (1/2)*3^(1/2)])](/support/helpjp/helpview.aspx?si=6523/file00294/math268.png)
| (5) |
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