Can implement this substitution with an operation with a regex?

[#1]

For example, this file is a txt file.TAB spacing:
Column 2 contains, column 2 contains
The maximum number of rows is 5
Can you use regular substitution to replace rows with less than 5 such symbols to complete the cell with a total of 5 similar symbols?
Make up as shown in the figure.

Thanks Experts!

[#2]

Names Default To Here(1);

str = "\[A	B	C
00001	744811604804487748	1
00002	744811604411447740~744811607410407768	1▲1
00003	744811607000017746~744811607407400440~744811607611467718~744811600601460016	1▲1▲1▲1
00004	744811606810447747	1
00005	744811606400167710~744811606610607767~744811608807400040~744811401407170047	1▲1▲1▲1
00006	744811607006017776~744811606014617747~744811600606400074	1▲1▲1
00007	744811607114067714~744811607406147747~744811607704147760~744811607710174146~744811600014600011	1▲1▲1▲1▲1
00008	744811604810187746~744811606706407717~744811606607400107	1▲1▲1
00009	744811608814480014~744811608704464148~744811401101140018~744811401607480040~744811401714140017	1▲1▲1▲1▲1
00010	744811606607177767~744811606707470064~744811608610440011~711741608004176007~744811401606180041~744811401704470014	1▲1▲1▲1▲1▲1
00011	744811607401167716~744811607408417748~711047607710460644~744811607711077714	1▲1▲1▲1
00012	460144607710400044~744811607711077716~744811400601440046~744811401104410044	1▲1▲1▲1
00013	744811607814617747~410144608807046447~744811608110140017~744811400807170010	1▲1▲1▲1
00014	744811607807117717~744811607806117747~744811608610400060~744811608804087740~744811400806070014	1▲1▲1▲1▲1
]\";

lines = Words(str, "\!N");
header = Remove From(lines, 1); // skip header

maxchar = 5;
res = Transform Each({line}, lines,
	row = Words(line, "\!t");
	char_to_add = maxchar - (Length(row[2]) - Length(Substitute(row[2], "~", "")));
	
	item1 = row[1];
	item2 = row[2] || Repeat("~", char_to_add);
	item3 = row[3] || Repeat("▲", char_to_add);
	
	new_line = Eval Insert("^item1^\!t^item2^\!t^item3^");	
);

Insert Into(res, header, 1);

dt = Open(Char to blob(Concat items(res, "\!N")), "text");

Scripting Index and Scripting Guide should cover everything you need to do something like this (outside of the last line).

[#3]

Thanks Experts!

python's

        for i in range(4, len(columns)):
            col = columns[i]

[#4]

Use For Each() and Index() in JSL

Edit:

Or just use normal For loop, just start loop from 4 and make it non-exclusive to lenght

[#5]

Thanks Experts!
Transposed is equivalent.