On 07/02/2011 11:30 AM, Robert Nichols wrote: > On 07/02/2011 12:45 PM, Daniel B. Thurman wrote: >> I seem to forget my shell programming >> but is the following statement valid? >> >> ($foo==0)?foo=1:foo=0 >> >> I thought it was called the tristate conditional >> operator but in any case I could not find it in >> google. > You need to enclose the entire expression in double parentheses to make > bash parse it as an expression. Plus, your syntax is slightly wrong: > > ((($foo==0)?foo=1:0)) > > or, since within an expression the '$' to reference a variable is optional: > > (((foo==0)?foo=1:0)) > > and, if you want to insert the result directly into a command line: > > echo $(((foo==0)?1:0)) > or > echo $(((foo==0)?foo=1:0)) > Thanks - this is good information! I used: (((foo==0)?foo=1:0)) and it works in a bash script! Will add this to my bookmarks! :) -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
