?"#A0B122" is an example of a CSS color value expressed in ______________________ notation.
Fill in the blank(s) with the appropriate word(s).
hexadecimal
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would add /opt/bin to PATH only if that pathname is not already in PATH. Be sure your solution works even if the shell variable starts out empty. Also make sure you check the list elements carefully. If /usr/opt/bin is in PATH but /opt/bin is not, the example just given should still add /opt/bin to PATH. (Hint: You might find this exercise easier to complete if you first write a function locate_field that tells you whether a string is an element in the value of a variable.)
Lists are commonly stored in environment variables by putting a colon (:) between each of the list elements. (The value of the PATH variable is an example.) You can add an element to such a list by catenating the new element to the front of the list, as in PATH=/opt/bin:$PATH If the element you add is already in the list, you now have two copies of it in the list. Write a shell function named addenv that takes two arguments: (1) the name of a shell variable and (2) a string to prepend to the list that is the value of the shell variable only if that string is not already an element of the list. For example, the call addenv PATH /opt/bin
Routers along the Internet backbone forward data packets to their destination using the fastest available path.
Answer the following statement true (T) or false (F)
Figure WD 6-1
In the accompanying figure, what type of hyperlink is being created?
A. a link to a Web page B. a link to an e-mail address C. a bookmark D. a link to a new document
A C2B e-business allows a buyer to name his or her own price for specific goods or services in a process called a ____.
A. supply chain B. forward auction C. network effect D. reverse auction