CODEWITHSUNDEEP
javascriptnode.jsstringterminalextended-ascii
jotadepicas
jotadepicas

Reputation: 2493

How to render extended ASCII characters in terminal using nodejs

According to this site, ASCII extended character codes 176, 177 and 178 correspond to three characters consisting in different shades of rectangles:

characters

Here in more detail, character 178:

character

Now, according to https://mathiasbynens.be/notes/javascript-escapes, I should be able to escape any ASCII character with a code below 256 with, for example, its hex escape sequence. So, 176 would be \xB0 in hex. But instead of getting the expected character as described above, I get "degree symbol" '°'. Degree symbol is ASCII 248, not 176, so.... what am I doing wrong?

Upvotes: 1

Views: 6527

Answers (2)

Quentin
Quentin

Reputation: 943569

JavaScript deals in Unicode, not Extended ASCII.

U+00B0 is the degree symbol

Block elements hold positions 2580 to 259F

console.log("\u2592");

Upvotes: 2

Obsidian Age
Obsidian Age

Reputation: 42304

JavaScript uses Unicode, rather than extended ASCII. You can find the Unicode equivalent of the ASCII symbols by using String.prototype.charCodeAt(), and then output them with String.prototype.fromCharCode():

console.log("░".charCodeAt(0)); // 9617
console.log("▒".charCodeAt(0)); // 9618
console.log("▓".charCodeAt(0)); // 9619

console.log(String.fromCharCode(9617)); // ░
console.log(String.fromCharCode(9618)); // ▒
console.log(String.fromCharCode(9619)); // ▓

Hope this helps! :)

Upvotes: 4

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