How does uʍop-ǝpᴉsdn text work?

Question

Here is a website that I found that will create upside down versions of any English text.

how it works? Does Unicode have inverted characters? Or what?

How can I write my own text flipping function?

Answer 1

Does Unicode have inverted characters?

Yes! Or at least characters that look like they are upside down. In addition, ordinary English letter characters may appear to be inverted. How u can be inverted n .

To encode it, you just need to take an array of characters, display them in reverse order and replace these characters with their inverted version. This will give you a good start: zʎxʍʌnʇsɹbdouɯ ןʞ sıɥbɟǝpɔqɐ

Answer 2

how it works? does unicode inverse characters?

Unicode has inverted characters. They have "TURNED" on their behalf:

ƍ U+018D LATIN SMALL LETTER TURNED DELTA Ɯ U+019C LATIN CAPITAL LETTER TURNED M ǝ U+01DD LATIN SMALL LETTER TURNED E Ʌ U+0245 LATIN CAPITAL LETTER TURNED V ɐ U+0250 LATIN SMALL LETTER TURNED A ɒ U+0252 LATIN SMALL LETTER TURNED ALPHA ɥ U+0265 LATIN SMALL LETTER TURNED H ɯ U+026F LATIN SMALL LETTER TURNED M ɰ U+0270 LATIN SMALL LETTER TURNED M WITH LONG LEG ɹ U+0279 LATIN SMALL LETTER TURNED R ɺ U+027A LATIN SMALL LETTER TURNED R WITH LONG LEG ɻ U+027B LATIN SMALL LETTER TURNED R WITH HOOK ʇ U+0287 LATIN SMALL LETTER TURNED T ʌ U+028C LATIN SMALL LETTER TURNED V ʍ U+028D LATIN SMALL LETTER TURNED W ʎ U+028E LATIN SMALL LETTER TURNED Y ʞ U+029E LATIN SMALL LETTER TURNED K ʮ U+02AE LATIN SMALL LETTER TURNED H WITH FISHHOOK ʯ U+02AF LATIN SMALL LETTER TURNED H WITH FISHHOOK AND TAIL ʴ U+02B4 MODIFIER LETTER SMALL TURNED R ʵ U+02B5 MODIFIER LETTER SMALL TURNED R WITH HOOK ʻ U+02BB MODIFIER LETTER TURNED COMMA ̒ U+0312 COMBINING TURNED COMMA ABOVE ჹ U+10F9 GEORGIAN LETTER TURNED GAN ᴂ U+1D02 LATIN SMALL LETTER TURNED AE ᴈ U+1D08 LATIN SMALL LETTER TURNED OPEN E ᴉ U+1D09 LATIN SMALL LETTER TURNED I ᴔ U+1D14 LATIN SMALL LETTER TURNED OE ᴚ U+1D1A LATIN LETTER SMALL CAPITAL TURNED R ᴟ U+1D1F LATIN SMALL LETTER SIDEWAYS TURNED M ᵄ U+1D44 MODIFIER LETTER SMALL TURNED A ᵆ U+1D46 MODIFIER LETTER SMALL TURNED AE ᵌ U+1D4C MODIFIER LETTER SMALL TURNED OPEN E ᵎ U+1D4E MODIFIER LETTER SMALL TURNED I ᵚ U+1D5A MODIFIER LETTER SMALL TURNED M ᵷ U+1D77 LATIN SMALL LETTER TURNED G ᶛ U+1D9B MODIFIER LETTER SMALL TURNED ALPHA ᶣ U+1DA3 MODIFIER LETTER SMALL TURNED H ᶭ U+1DAD MODIFIER LETTER SMALL TURNED M WITH LONG LEG ᶺ U+1DBA MODIFIER LETTER SMALL TURNED V ℩ U+2129 TURNED GREEK SMALL LETTER IOTA Ⅎ U+2132 TURNED CAPITAL F ⅁ U+2141 TURNED SANS-SERIF CAPITAL G ⅂ U+2142 TURNED SANS-SERIF CAPITAL L ⅄ U+2144 TURNED SANS-SERIF CAPITAL Y ⅋ U+214B TURNED AMPERSAND ⅎ U+214E TURNED SMALL F ⌙ U+2319 TURNED NOT SIGN ❛ U+275B HEAVY SINGLE TURNED COMMA QUOTATION MARK ORNAMENT ❝ U+275D HEAVY DOUBLE TURNED COMMA QUOTATION MARK ORNAMENT ⦢ U+29A2 TURNED ANGLE Ɐ U+2C6F LATIN CAPITAL LETTER TURNED A ⱹ U+2C79 LATIN SMALL LETTER TURNED R WITH TAIL ⱻ U+2C7B LATIN LETTER SMALL CAPITAL TURNED E Ꝿ U+A77E LATIN CAPITAL LETTER TURNED INSULAR G ꝿ U+A77F LATIN SMALL LETTER TURNED INSULAR G Ꞁ U+A780 LATIN CAPITAL LETTER TURNED L ꞁ U+A781 LATIN SMALL LETTER TURNED L 

However, this is far from a complete set. Most inverted text works by picking characters that are fairly similar to inverted letters. This is the equivalent of typing 0.7734 on your calculator to write "hELLO".

Answer 3

When 'uʍop-ǝpısdn' is copied and output to the hexadecimal dump program, the line looks like:

 75 CA 8D 6F 70 2D C7 9D 70 C4 B1 73 64 6E 

UTF-8 crash:

 0x75 = U+0075 = LATIN SMALL LETTER U 0xCA 0x8D = U+028D = LATIN SMALL LETTER TURNED W 0x6F = U+006F = LATIN SMALL LETTER O 0x70 = U+0070 = LATIN SMALL LETTER P 0x2D = U+002D = HYPHEN MINUS 0xC7 0x9D = U+01DD = LATIN SMALL LETTER TURNED E 0x70 = U+0070 = LATIN SMALL LETTER P 0xC4 0xB1 = U+0131 = LATIN SMALL LETTER DOTLESS I 0x73 = U+0073 = LATIN SMALL LETTER S 0x64 = U+0064 = LATIN SMALL LETTER D 0x6E = U+006E = LATIN SMALL LETTER N 

Answer 4

They are just Unicode characters.

Answer 5

Look at the source of the webpage:

 function flip() { var result = flipString(document.f.original.value); document.f.flipped.value = result; } function flipString(aString) { aString = aString.toLowerCase(); var last = aString.length - 1; var result = ""; for (var i = last; i >= 0; --i) { result += flipChar(aString.charAt(i)) } return result; } function flipChar(c) { if (c == 'a') { return '\u0250' } else if (c == 'b') { return 'q' } else if (c == 'c') { return '\u0254' //Open o -- copied from pne