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  2. sort (Unix) - Wikipedia

    en.wikipedia.org/wiki/Sort_(Unix)

    Sorting is done based on one or more sort keys extracted from each line of input. By default, the entire input is taken as sort key. Blank space is the default field separator. The command supports a number of command-line options that can vary by implementation. For instance the "-r" flag will reverse the sort order.

  3. Here document - Wikipedia

    en.wikipedia.org/wiki/Here_document

    The most common syntax for here documents, originating in Unix shells, is << followed by a delimiting identifier (often the word EOF or END [2]), followed, starting on the next line, by the text to be quoted, and then closed by the same delimiting identifier on its own line.

  4. Find first set - Wikipedia

    en.wikipedia.org/wiki/Find_first_set

    This is closely related to count leading zeros (clz) or number of leading zeros (nlz), which counts the number of zero bits preceding the most significant one bit. [ nb 2 ] There are two common variants of find first set, the POSIX definition which starts indexing of bits at 1, [ 2 ] herein labelled ffs, and the variant which starts indexing of ...

  5. Cyclic redundancy check - Wikipedia

    en.wikipedia.org/wiki/Cyclic_redundancy_check

    Since the leftmost divisor bit zeroed every input bit it touched, when this process ends the only bits in the input row that can be nonzero are the n bits at the right-hand end of the row. These n bits are the remainder of the division step, and will also be the value of the CRC function (unless the chosen CRC specification calls for some ...

  6. Borda count - Wikipedia

    en.wikipedia.org/wiki/Borda_Count

    The Borda count is used for certain political elections in Slovenia and the Micronesian nation of Kiribati. A similar rule is used in Nauru. In Slovenia, the Borda count is used to elect two of the ninety members of the National Assembly: one member represents a constituency of ethnic Italians, the other a constituency of the Hungarian minority.

  7. CAPTCHA - Wikipedia

    en.wikipedia.org/wiki/Captcha

    This CAPTCHA (reCAPTCHA v1) of "smwm" obscures its message from computer interpretation by twisting the letters and adding a slight background color gradient.A CAPTCHA (/ ˈ k æ p. tʃ ə / KAP-chə) is a type of challenge–response test used in computing to determine whether the user is human in order to deter bot attacks and spam.