Glowscript list.reverse() bug?

[Adam Hausknecht]

Hi,

I have a GlowScript 2.1 program that reverses a list by using the statement 

 xList.reverse()

However, the  revisedGlowScript 2.6 version of the program freezes at this statement (see below).  Is this statement no longer supported?

================================

def initTest():

    ##alert("initTest 1")

    global gItems, gDataSize

    global gCurrentViewMode

    maxR = floor(kSize/2)

    if kSize % gDataSize == 0:

        yList = range(maxR, -maxR, -kTab)

        xList = range(maxR, -maxR, -kTab)

    else:  

        yList = range(maxR-floor(kTab/2), -maxR, -kTab)

        xList = range(maxR-floor(kTab/2), -maxR, -kTab)

    alert("initTest 2a, "+ xList[0])

    xList.reverse().  ## Freezes here!

    alert("initTest 2b, "+ xList[0])

    if gCurrentDataOrder == kIncreasing:

       alert("initTest 2c, "+ yList[0])

       yList.reverse()

       alert("initTest 2d, "+ yList[0])

    elif gCurrentDataOrder == kRandomOrder:

       shuffle(yList)

#  more code

Thanks in advance,

Adam Hausknecht

Department of Mathematics

UMass Dartmouth

[Adam Hausknecht]

Never mind! I now understand that  the range function returns an iterator instead of a list!

Adam Hausknecht 

[Bruce Sherwood]

Good for you for catching this before I could. In Python 2.x range produced a list, but Python 3 (which the RapydScript-NG Python-to-JavaScript transpiler attempts to implement), range indeed produces an iterator. The switch from the older RapydScript to RapydScript-NG occurred in GlowScript 2.3, in January 2017.