commonPrefix

Returns the common prefix of two ranges.

auto commonPrefix(R1 r1, R2 r2)
auto
commonPrefix
(
alias pred = "a == b"
R1
R2
)
(
R1 r1
,
R2 r2
)
if (
isForwardRange!R1 &&
isInputRange!R2
&&
!isNarrowString!R1
&&
is(typeof(binaryFun!pred(r1.front, r2.front)))
)
auto commonPrefix(R1 r1, R2 r2)
auto commonPrefix(R1 r1, R2 r2)
auto commonPrefix(R1 r1, R2 r2)

Parameters

pred: The predicate to use in comparing elements for commonality. Defaults to equality "a == b".
r1 R1: A forward range of elements.
r2 R2: An input range of elements.

A slice of r1 which contains the characters that both ranges start with, if the first argument is a string; otherwise, the same as the result of takeExactly(r1, n), where n is the number of elements in the common prefix of both ranges.

Examples

assert(commonPrefix("hello, world", "hello, there") == "hello, ");

commonPrefix

Parameters

Return Value

Examples

See Also

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