To check whether the music symbol ♫ is being displayed in a string (if it is not being displayed on some devices), you can try measuring the string width; if width == 0 then the symbol is absent.

I want to check if the String I am about to display can be displayed by my custom font.

I can't find a method to check if my Typeface can display a particular String though.

I want to be able to detect if the font used can display a certain character or not

How I can know which glyph the font does not support in that list?

$ python checkfont.py /usr/share/fonts/**/DejaVuSans.ttf 65 12622 # a ㅎ

The script takes as arguments the font path and optionally code points / characters to search for:

Determine if a glyph exists in a given font

I'm looking to see if there is a way, in PHP, to determine if a glyph exists for a given character in a font.

Just for fun, I did a little experimenting at home to show how some of these different types of cement hold up. I started by cementing a bunch of materials together with a bunch of different types of cement. I waited 24 hours, then cut each one roughly in half, down the middle.

How do you know if source maps are working correctly? Try adding a syntax error to one of your assets and use the console to debug. Does it show the correct file and source location? Or does it reference the top level application.js file?

Washing the hair with soap removes less oil from the hair, washing the hair with shampoo removes more oil.

The main important point is not to shampoo your hair too often. Depending on the culture in which you live, washing the hair no more often than every 1-4 weeks may be the best way to have healthy hair.