On June 29, 2011, Edwin Woollett wrote:
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>Use of apply ('search_file, alist) hangs the
>run of my function search_mfiles (file-or-direc-path,substring, options ),
>which uses search_file(file,substring,options) and ls (path).
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I found obscure error inside search_file, which had the lines
;;; %lines : read_text (%fname),
;;; if not %lines then return (false),
which resulted in the hangup of Maxima in the context described.
By changing the lines to
;;;; %lines : read_text (%fname),
;;;; if %lines = false then return (false),
the hangup went away with typical results:
--------------------------------------------
(%i1) display2d:false$
(%i2) load(search_mfiles);
(%o2) "c:/work2/search_mfiles.mac"
(%i3) search_mfiles ( "c:/work2/temp1/", "is" );
c:/work2/temp1/atext1.txt
2 Is this line two? Yes, this is line two.
6 This is line six, Isn't it?
c:/work2/temp1/atext2.txt
2 Is this line two? Yes, this is line two.
6 This is line six, Isn't it?
c:/work2/temp1/calc1news.txt
9 The organization of chapter six is then:
96 The Maxima output is the list of the vector curl components in the
98 a reminder to the user of what the current coordinate system is
102 Thus the syntax is based on lists and is similar to (although better
105 There is a separate function to change the current coordinate system.
112 plotderiv(..) which is useful for "automating" the plotting
c:/work2/temp1/ndata1.dat
1 The calculation of the effective cross section is much simplified if
only
3 those collisions are considered for which the impact parameter is large,
so
5 that the field U is weak and the angles of deflection are small. The
c:/work2/temp1/stavros-tricks.txt
34 Not a bug, but Maxima doesn't know that the beta function is symmetric:
c:/work2/temp1/text1.txt
1 is this line one? Yes, this is line one.
3 Here is line three.
5 This is line five, isn't it?
c:/work2/temp1/trigsimplification.txt
13 (1) Is there a Maxima command that indicates whether expr is a product
of
76 > (1) Is there a Maxima command that indicates whether expr is a
product of
91 Well, that is inherent in their definition. Trigreduce replaces all
94 is sin(x)*cos(x), since the individual terms are not products of trigs.
95 There is no built-in function which tries to find the smallest
expression,
151 is better. If the user wants to expand the contents of sin to discover
153 is right that Maxima avoids potentially very expensive operations in
c:/work2/temp1/wu-d.txt
1 As a dedicated windows xp user who is delighted to have windows binaries
3 all who are considering windows use that there is no problem with
keeping previous
(%o3) done
-----------------------------------
I am experimenting with using these functions to search the Maxima lisp
source code
from inside a Maxima session.
Ted Woollett