Alan Freedman -- The Computer Language Company - Computer Desktop Encyclopedia
Computer Desktop Encyclopedia
Longest-Running Tech Reference on the Planet

A CDE Definition

You'll love The Computer Desktop Encyclopedia (CDE) for Tech Term of the Day (TTOD)

LOOK UP ANOTHER TERM


filters and pipes

External DOS/Windows commands that work together to change data in some manner. The filters are:

  FIND - Search for text
  SORT - Resequence text
  MORE - Pause after a screenful

PIPES DIRECT THE OUTPUT
The pipe symbol is the vertical bar "|" (press shift-backslash). The Find filter and pipe are useful together to locate files with common characters in their name. For example, to display all the files that have "ZIP" anywhere in their name, the following command pipes the output of the Dir command to the Find filter, which only lets through file names that contain "ZIP." See pipe.

  C:\>dir | find "ZIP"  command

  PKUNZIP   EXE         results
  PKZIP     EXE
  C:\>





pipe

(1) Slang for "communications channel" (line, wire, fiber, etc.). See data pipe, fat pipe and thin pipe.

(2) The symbol for Boolean OR operations, which is the Shift-Backslash key on a computer keyboard. For example, to search for Dell or Toshiba laptops in Google, the pipe symbol can be used instead of upper case OR as follows:

       laptops (dell | toshiba)

       laptops (dell OR toshiba)


(3) The symbol for a shared space that accepts the output of one program for input into another. In Windows, DOS and Unix, the pipe command is a vertical line (|). For example, the DOS/Windows command dir | find directs the output of the directory list to the FIND filter. In Unix/Linux, the statement ls | wc directs the directory list output to the word count function to count the number of files. See ls and filters and pipes.



Personal Use Only

Before/After Your Search Term
BeforeAfter
film frame sequencefin
film mode detectionfinalization
film recorderfinalized
film scannerFinally Light Bulb
film sequencefinancial planning language
film transferfinancial planning system
filterfinancial software
filter bubblefind
filter driverfind file
filteringfind me

Terms By Topic
Click any of the following categories for a list of fundamental terms.
Computer Words You Gotta KnowSystem design
Job categoriesUnix/Linux
Interesting stuffPersonal computers
InternetIndustrial Automation/Process Control
Communications & networkingAssociations/Standards organizations
HistoryDesktop publishing
Audio/VideoGraphics
MainframesSecurity
ProgrammingHealthcare IT
System design