std.convert

std.convert handles number/string/base conversion and printf-style
formatting.

Reference

to_hex(n)  from_hex(str)
to_bin(n)  from_bin(str)
to_oct(n)  from_oct(str)
parse_int(str[, base])   # auto-detects 0x, 0b, 0o prefixes
format(value, fmt)       # printf-style; only one conversion allowed

Examples

print(std.convert.to_hex(255))             # ff
print(std.convert.from_hex("ff"))          # 255
print(std.convert.to_bin(10))              # 1010
print(std.convert.from_bin("1010"))        # 10
print(std.convert.to_oct(8))               # 10
print(std.convert.parse_int("ff", 16))     # 255
print(std.convert.parse_int("0x1F"))       # 31  (prefix-inferred)
print(std.convert.parse_int("0b1010"))     # 10

Parsing is strict: no surrounding whitespace, no `+`/`-` signs — the whole
string must be digits in the base.
print(std.convert.parse_int("0o17"))       # 15
print(std.convert.format(3.14159, "%.2f")) # 3.14
print(std.convert.format(42, "%04d"))      # 0042
print(std.convert.format(255, "%x"))       # ff

format accepts a single printf conversion (e.g. %d, %x, %.2f,
%04d). Pass the value and the format string — it returns the formatted
string.

See also

• std.hash — hashing digests
• std.string — split/join and classification helpers