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1. Dictionary

   mask

   /mɑːsk/

   noun

   • 1. a covering for all or part of the face, worn as a disguise, or to amuse or frighten others. Similar disguiseveilfalse facedominostocking maskfancy dresshistorical:visorarchaic:vizard
   • 2. a covering worn over the mouth and nose in order to reduce the transmission of infectious agents, or to prevent the inhalation of pollutants and other harmful substances. Similar mattephotomaskshadow maskmaskingmasking tape
   • ▪ a protective covering fitting over the whole face, worn in fencing, ice hockey, and other sports. Similar face maskprotective maskface coveringface shieldsurgical maskmedical maskgas maskoxygen maskfencing maskiron maskski maskdust masksafety goggleswelding goggleswelding maskeye maskvisor
   • ▪ a respirator used to filter inhaled air or to supply gas for inhalation.
   • ▪ a masked person. archaic
   • 3. a face pack: "this exfoliating mask helps clear your pores and leaves your skin feeling soft and healthy"
   • 4. a likeness of a person's face moulded or sculpted in clay or wax.
   • ▪ a person's face regarded as having set into a particular expression: "his face was a mask of rage"
   • ▪ a hollow model of a human head worn by ancient Greek and Roman actors.
   • ▪ the face or head of a fox or other game animal, as a trophy.
   • 5. a manner or expression that hides one's true character or feelings: "I let my mask of respectability slip" Similar pretencesemblanceveilscreenfrontfalse frontfacadeveneerblindfalse coloursdisguiseguiseconcealmentcovercover-upcloakcamouflage
   • 6. a piece of material such as card used to cover a part of an image that is not required when exposing a print.
   • 7. a patterned metal film used in the manufacture of microcircuits to allow selective modification of the underlying material.
   • 8. the enlarged labium of a dragonfly larva, which can be extended to seize prey.

   verb

   • 1. cover (the face) with a mask: "he had been masked, bound, and abducted"
   • 2. conceal (something) from view: "the poplars masked a factory"
   • ▪ (of a taste, smell, etc.) prevent the perception of (another sensation): "brandy did not completely mask the bitter taste"
   • 3. cover (an object or surface) so as to protect it during painting: "mask off doors and cupboards with sheets of plastic" Similar mattephotomaskshadow maskmaskingmasking tape

   Word Origin mid 16th century: from French masque, from Italian maschera, mascara, probably from medieval Latin masca‘witch, spectre’, but influenced by Arabic masḵara ‘buffoon’.

   Scrabble Points: 10

   • M

     3

   • A

     1

   • S

     1

   • K

     5

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2. stackoverflow.com › questions › 10493411c - What is bit masking? - Stack Overflow

   stackoverflow.com › questions › 10493411

   May 8, 2012 · I am fairly new to C programming, and I encountered bit masking. What is the general concept and function of bit masking? Examples are much appreciated.

3. stackoverflow.com › questions › 1242585c++ - How masking works - Stack Overflow

   stackoverflow.com › questions › 1242585

   Aug 7, 2009 · Your variable, msginfo_mask, when represented as a binary number (1's and 0's) is used as a "mask" by setting certain bits to 1 (using bit-wise OR) or clearing certain bits to 0 (using bit-wise AND). Your code snippet sets certain bits to 1 while leaving others unchanged. Masking is comparable to how a painter masks off areas that they do not ...

4. stackoverflow.com › questions › 50563406c - How to use #define mask in "if" comparison - Stack Overflow

   stackoverflow.com › questions › 50563406

   It is a known flaw in the C language that | and & have lower precedence than == (Dennis Ritchie admitted this at some point). This is the practical reason why your code doesn't work. Solve this by writing the macro properly: #define MASK_A (IPC_CREAT | IPC_EXCL | 0666) Any decent C programming book will address issues like this and show how to write macros properly with parenthesis.

5. stackoverflow.com › questions › 2915037C-macro: set a register field defined by a bit-mask to a given...

   stackoverflow.com › questions › 2915037

   May 26, 2010 · EDIT: in particular, I'm looking for a way to do reduce the run-time computing requirements. Is there a way to have the pre-processor compute the number of required left-shifts for the value? Yes: value *= ((MASK) & ~((MASK) << 1)) This multiplies value by the lowest set bit in MASK. The multiplier is known to be a constant power of 2 at compile time, so this will be compiled as a simple left shift by any remotely sane compiler.

6. stackoverflow.com › questions › 1392059c - Algorithm to generate bit mask - Stack Overflow

   stackoverflow.com › questions › 1392059

   Sep 8, 2009 · I was facing this unique problem of generating a bit-mask based on the input parameter. For example, if param = 2, then the mask will be 0x3 (11b) if param = 5, then the mask will be 0x1F (1 1111...

7. stackoverflow.com › questions › 18591924c++ - How can I use a bitmask? - Stack Overflow

   stackoverflow.com › questions › 18591924

   Sep 3, 2013 · Learn how to use a bitmask in C++ with a clear example and explanation from Stack Overflow, the largest online community for programmers.

8. stackoverflow.com › questions › 12578507html - Implement an input with a mask - Stack Overflow

   stackoverflow.com › questions › 12578507

   Learn how to implement an input mask in HTML on Stack Overflow, with discussions on pattern attributes and customizing input dates.

9. stackoverflow.com › questions › 63341888How to create a mask for a specific column in a dataframe in...

   stackoverflow.com › questions › 63341888

   Aug 10, 2020 · I created a mask to replace detected outliers with NaN values in a specific column in a dataframe, and the code I wrote worked perfectly for the random dataframe I created, but the the same code di...

10. stackoverflow.com › questions › 14237503c++ - the best way define a mask - Stack Overflow

    stackoverflow.com › questions › 14237503

    Jan 9, 2013 · I want to use a masks for that.I am not sure what is the best way to define such masks. For example I need to extract bits 6:14.So I need to define a mask as 111111111 << 6.

11. stackoverflow.com › questions › 62035498Bitwise operations and masking in C - Stack Overflow

    stackoverflow.com › questions › 62035498

    May 27, 2020 · Welcome to StackOverflow! Please take the tour and read "How to Ask". Then come back and edit your question, please. -- Would you mind to provide a minimal reproducible example? Or at least some specific examples of offset and and mask you expect from it? Like: offset = 3 gives mask = 00011110 (setting the left 3 bits to 0, keep the next 4 bits, set the rightmost bit to 0).