indexOf

Searches for a character in a string or range.

ptrdiff_t indexOf(Range s, dchar c, CaseSensitive cs)
ptrdiff_t indexOf(const(C)[] s, dchar c, CaseSensitive cs)
ptrdiff_t indexOf(Range s, dchar c, size_t startIdx, CaseSensitive cs)
ptrdiff_t indexOf(const(C)[] s, dchar c, size_t startIdx, CaseSensitive cs)
ptrdiff_t
indexOf
(
C
)
(
scope const(C)[] s
,
dchar c
,
size_t startIdx
,
CaseSensitive cs = Yes.caseSensitive
)
if (
isSomeChar!C
)
ptrdiff_t indexOf(Range s, const(Char)[] sub)
ptrdiff_t indexOf(Range s, const(Char)[] sub, CaseSensitive cs)
ptrdiff_t indexOf(const(Char1)[] s, const(Char2)[] sub, size_t startIdx)
ptrdiff_t indexOf(const(Char1)[] s, const(Char2)[] sub, size_t startIdx, CaseSensitive cs)

Parameters

s const(C)[]: string or InputRange of characters to search for c in
c dchar: character to search for in s
startIdx size_t: index to a well-formed code point in s to start searching from; defaults to 0
cs CaseSensitive: specifies whether comparisons are case-sensitive (Yes.caseSensitive) or not (No.caseSensitive).

If c is found in s, then the index of its first occurrence is returned. If c is not found or startIdx is greater than or equal to s.length, then -1 is returned. If the parameters are not valid UTF, the result will still be either -1 or in the range [startIdx .. s.length], but will not be reliable otherwise.

Throws

If the sequence starting at startIdx does not represent a well-formed code point, then a std.utf.UTFException may be thrown.

Examples

import std.typecons : No;

string s = "Hello World";
assert(indexOf(s, 'W') == 6);
assert(indexOf(s, 'Z') == -1);
assert(indexOf(s, 'w', No.caseSensitive) == 6);

import std.typecons : No;

string s = "Hello World";
assert(indexOf(s, 'W', 4) == 6);
assert(indexOf(s, 'Z', 100) == -1);
assert(indexOf(s, 'w', 3, No.caseSensitive) == 6);

indexOf

Parameters

Return Value

Throws

Examples

See Also

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