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Bug with Sequence

• To: mathgroup at smc.vnet.net
• Subject: [mg104568] Bug with Sequence
• From: dh <dh at metrohm.com>
• Date: Wed, 4 Nov 2009 01:34:10 -0500 (EST)

Hello,

has anybody an explanation for the behavior of "Sequence"? I think it is 

an ugly bug.

Consider the following that shoud succesively shorten the list t:



t = {1, 2, 3}; j = 0;

While[ ++j < 4, t[[1]] = Sequence[]; Print[t]]



this returns: {2,3} three times.Dropping of the first element only seems 

to work once.

If you say Information[t] you get:

t={Sequence[],2,3}



Daniel

• Follow-Ups:
  • Re: Bug with Sequence
    • From: Leonid Shifrin <lshifr@gmail.com>
  • Re: Bug with Sequence
    • From: DrMajorBob <btreat1@austin.rr.com>
  • Re: Bug with Sequence
    • From: "Kurt TeKolste" <tekolste@fastmail.us>
  • Re: Bug with Sequence
    • From: Patrick Scheibe <pscheibe@trm.uni-leipzig.de>
  • Re: Bug with Sequence
    • From: Sseziwa Mukasa <mukasa@jeol.com>