String -> ByteString

pack :: String -> ByteString
bytestring Data.ByteString.Char8
O(n) Convert a String into a ByteString For applications with large numbers of string literals, pack can be a bottleneck.
pack :: [Char] -> ByteString
bytestring Data.ByteString.Lazy.Char8
O(n) Convert a String into a ByteString.
error :: [Char] -> a
base Prelude
error stops execution and displays an error message.
readFile :: FilePath -> IO ByteString
bytestring Data.ByteString.Lazy.Char8
Read an entire file lazily into a ByteString.
readFile :: FilePath -> IO ByteString
bytestring Data.ByteString.Lazy
Read an entire file lazily into a ByteString. The Handle will be held open until EOF is encountered.
readFile :: FilePath -> IO ByteString
bytestring Data.ByteString
Read an entire file strictly into a ByteString. This is far more efficient than reading the characters into a String and then using pack. It also may be more efficient than opening the file and reading it using hGet.
readFile :: FilePath -> IO ByteString
bytestring Data.ByteString.Char8
Read an entire file strictly into a ByteString. This is far more efficient than reading the characters into a String and then using pack. It also may be more efficient than opening the file and reading it using hGet.
repeat :: Char -> ByteString
bytestring Data.ByteString.Lazy.Char8
repeat x is an infinite ByteString, with x the value of every element.
singleton :: Char -> ByteString
bytestring Data.ByteString.Char8, bytestring Data.ByteString.Lazy.Char8
O(1) Convert a Char into a ByteString
trace :: String -> a -> a
base Debug.Trace
When called, trace outputs the string in its first argument, before returning the second argument as its result. The trace function is not referentially transparent, and should only be used for debugging, or for monitoring execution. Some implementations of trace may decorate the string that's output to indicate that you're tracing. The function is implemented on top of putTraceMsg.
buf_fromStr :: BufferOp a -> String -> a
HTTP Network.BufferType
read :: Read a => String -> a
base Prelude, base Text.Read
The read function reads input from a string, which must be completely consumed by the input process.
fromString :: IsString a => String -> a
base Data.String, base GHC.Exts
strMsg :: Error a => String -> a
transformers Control.Monad.Trans.Error, mtl Control.Monad.Error.Class, mtl Control.Monad.Error
printf :: PrintfType r => String -> r
base Text.Printf
Format a variable number of arguments with the C-style formatting string. The return value is either String or (IO a). The format string consists of ordinary characters and /conversion specifications/, which specify how to format one of the arguments to printf in the output string. A conversion specification begins with the character %, followed by one or more of the following flags: > - left adjust (default is right adjust) > + always use a sign (+ or -) for signed conversions > 0 pad with zeroes rather than spaces followed optionally by a field width: > num field width > * as num, but taken from argument list followed optionally by a precision: > .num precision (number of decimal places) and finally, a format character: > c character Char, Int, Integer, ... > d decimal Char, Int, Integer, ... > o octal Char, Int, Integer, ... > x hexadecimal Char, Int, Integer, ... > X hexadecimal Char, Int, Integer, ... > u unsigned decimal Char, Int, Integer, ... > f floating point Float, Double > g general format float Float, Double > G general format float Float, Double > e exponent format float Float, Double > E exponent format float Float, Double > s string String Mismatch between the argument types and the format string will cause an exception to be thrown at runtime. Examples: > > printf "%d\n" (23::Int) > 23 > > printf "%s %s\n" "Hello" "World" > Hello World > > printf "%.2f\n" pi > 3.14
throwErrno :: String -> IO a
base Foreign.C.Error
Throw an IOError corresponding to the current value of getErrno.
badIO :: String -> IO a
template-haskell Language.Haskell.TH.Syntax
throwSocketError :: String -> IO a
network Network.Socket.Internal
Throw an IOError corresponding to the current socket error.
fail :: Monad m => String -> m a
base Prelude, base Control.Monad, base Control.Monad.Instances
iterate :: (Char -> Char) -> Char -> ByteString
bytestring Data.ByteString.Lazy.Char8
iterate f x returns an infinite ByteString of repeated applications of f to x: > iterate f x == [x, f x, f (f x), ...]

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