On 3/13/15 12:19 PM, Walter Bright wrote:
On 3/13/2015 10:31 AM, Andrei Alexandrescu wrote:
For example the expression (assuming s is e.g. a string)
File("/tmp/a").byChunk(4096).joiner.startsWith(s)
opens a file, progressively reads chunks of 4KB, stitches them
together at no
cost, compares against a prefix until it makes a decision, then closes
the file
and returns the result. A putative Go user wouldn't even dream of using
HasPrefix directly on a stream coming from a file; the whole endeavor
would be a
function that painstakingly takes all of these steps by hand.
We need to take the "disconcerting" out the documentation equation
while still
exposing the power. s1.startsWith(s2) is perfectly apt for two
strings, and that
should be immediately apparent to someone who just needs that.
I suggest putting that snippet in the documentation as an example!
Also: does /tmp/a have /tmp/b as a prefix?
File("/tmp/a").byChunk(4096).joiner.startsWith(
File("/tmp/b").byChunk(4096).joiner)
I also wonder how efficient that is.
Andrei
