index and find cmd
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12-16-2018, 11:38 PM
(This post was last modified: 12-16-2018 11:53 PM by compsystems.)
Post: #3
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RE: index and find cmd
on XCAS PC, Help Button.
Quote:Index of the first position of an object in a list, a string or a set or return an error message. Index acts as a system variable and as a functional command, For functional command: Index() returns the first position of an object in a list, a string or a set, if it does not find the object returns an error message. "Error: Bad Argument Value[/code]" index(List/String/Set,Object) LIST: index:=0:; index([9,8,-1,8,9,8,7],8) [↵] returns "Done",1 index:=1:; index([9,8,-1,8,9,8,7],8) [↵] returns "Done",2 SET: index:=0:; F_ := set[ H_,E_,L_,L_,O_]; F_ => set[ H_,E_,L_,O_]; // the multiplicity of L_ is eliminated index(F_,O_) [↵] returns 3 index(F_,L_) [↵] returns 2 Table with string as index https://www-fourier.ujf-grenoble.fr/~par...de407.html T_:= table( 3=-10, "a"=10, "b"=20, "c"=30, "d"=40 ) [↵] T_["b"] [↵] 20, Why it changes to T_("b1") on history view, I think the history view engine has to be improved. |
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Messages In This Thread |
index and find cmd - compsystems - 12-16-2018, 06:31 PM
RE: index and find cmd - cdmackay - 12-16-2018, 07:34 PM
RE: index and find cmd - compsystems - 12-16-2018 11:38 PM
RE: index and find cmd - cdmackay - 12-17-2018, 12:02 AM
RE: index and find cmd - rprosperi - 12-17-2018, 12:25 AM
RE: index and find cmd - cdmackay - 12-17-2018, 01:04 AM
RE: index and find cmd - compsystems - 12-17-2018, 02:35 AM
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