Although the examples here use 8-bit integers, Java integers are 32 bits. The highest bit is reserved for plus or minus sign. So you can set/unset 31 one-bit flags and a whole bunch of combination masks derived from the one-bit flag masks.
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www.vipan.com/htdocs/bitwisehelp.html
www.vipan.com/htdocs/bitwisehelp.html
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Mask (computing) - Wikipedia, the free encyclopedia
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In computer science, a mask is data that is used for bitwise operations. Using a mask, multiple bits in a byte, nibble, word (etc.) can be set either on, off or inverted from on to off (or vice vers...
en.wikipedia.org/wiki/Mask_(computing)
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In order to lump them together we need use bitmasks and bitwise operators to save space and time. While bitmasks and bitwise operators are nothing new to programmers with a computer science background, those of us coming from design backgrounds they can be a bit daunting.
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mark-story.com/posts/view/using-bitmasks-to-indicate-st...
mark-story.com/posts/view/using-bitmasks-to-indicate-status
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It is however somewhat less transparent and a (tiny) little more computationally intensive, but then again, using exclusively powers of two as keys in order to be able to generate bit masks isn’t that transparent either :-p. If you really want your keys to remain under 32, you can always use a checks, triggers,
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maggienelson.com/2009/02/denormalization-with-bitmasks/
maggienelson.com/2009/02/denormalization-with-bitmasks/
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IP Bit Mask Dotted Decimal Mask Hexadecimal Mask Effective Hosts Effective Subnets Network number Broadcast Usable IP Range Usable Ips /subnet...
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www25.brinkster.com/davegoldstraw/NetWorkMasks.htm
www25.brinkster.com/davegoldstraw/NetWorkMasks.htm
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HP OpenVMS Systems ... ask the wizar ... When working with OpenVMS bit definition symbols, realize that there are both "V" bit offsets and "M" bit mask values.
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h71000.www7.hp.com/wizard/wiz_0813.html
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Hi Folks I was looking for a way to test bit settings in a Hex value. i.e. Hex value 0x07 Bit mask 0x05 If at least all bits in mask are set in value then true. Using expr, expr 0x07 & 0x05, gives 5 which reading from the man page is as expected. ... Re: BIT masks;
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www.codecomments.com/message256812.html
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Bit masks can be used to select out rows from bit columns (TFORMn = #X) in FITS files. To represent the mask, binary, octal, and hex formats are allowed: ... To construct the boolean expression using the mask as the boolean equal operator described above on a bit table column. For example, if you had a 7 bit column...
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heasarc.gsfc.nasa.gov/docs/software/fitsio/c/f_user/nod...
heasarc.gsfc.nasa.gov/docs/software/fitsio/c/f_user/node78.html
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(16-bit) masks, overlays and source masks to fully control the shape and pattern; Every sub-picture in this Robert Bateman drawing has a black boundary of the photo mosaic ... and the use of a 32-bit alpha mask; No real photo-mosaic, but 3D-'art' with 32-bit masks in combination with a shadow effect.
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