Related:

• flag n. [very common] A variable or quantity that can take on one of two value
  a bit, particularly one that is used to indicate one of two outcomes or is used to control which of two things is to be done....
• flag: n. A variable or quantity that can take on one of two value
  a bit, particularly one that is used to indicate one of two outcomes or is used to control which of two things is to be done....
• The questions remain the same. The answers are eternally variable.
• hidden flag n. [scientific computation] An extra option added to a routine without changing the calling sequence.
  For example, instead of adding an explicit input variable to instruct a routine to give extra diagnostic output, the programmer might just add a test for some otherwise meaningless feature of the existing inputs, such as a negative mass....
• hidden flag: [scientific computation] n. An extra option added to a routine without changing the calling sequence.
  For example, instead of adding an explicit input variable to instruct a routine to give extra diagnostic output, the programmer might just add a test for some otherwise meaningless feature of the existing inputs, such as a negative mass....
• Choose variable names that will not be confused.
• flag day n. A software change that is neither forward- nor backward-compatible, and which is costly to make and costly to reverse.
  Can we install that without causing a flag day for all users?...
• flag day: n. A software change that is neither forward- nor backward-compatible, and which is costly to make and costly to reverse.
  Can we install that without causing a flag day for all users?...