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Which different widths of code points regarding the print column do exist, supposed an a (\N{LATIN SMALL LETTER A}) has width of print column 1?
Edit:
“print column width” refers to the output to a terminal
In Unicode, characters can be nonspacing (0 columns), narrow (1 column) or wide (2 columns). You can get the number of columns a string would take using the method
columnsfromGCString, ormbswidthfromText::CharWidth.Of course, this only works for monospaced output, e.g: output to a terminal.