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To: Andrew Gromov <andrewgrom@rambler.ru>, internals
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Date: Mon, 8 Jul 2019 15:20:48 +0200
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Subject: Re: [VOTE] Voting opens for str_starts_with and ends_with functions
From: cmbecker69@gmx.de ("Christoph M. Becker")

On 08.07.2019 at 15:05, Andrew Gromov wrote:

>> Please don't switch behaviours via flags: separate names and
>> implementations are much clearer and much simpler to follow.
>>
>> Yes, you will have multiple variations, but that's fine.
>
>
> It is depends of preferences.
>
> In my opinion, create new function for every possible situation is more
> worse
> then use flags.
>
>
>
> Python
>
>
> str.startswith(prefix[, start[, end]]) -> bool
>
>
>
> C#
>
>
> public bool StartsWith (string value, bool ignoreCase,
> System.Globalization.CultureInfo culture);
>
>
> public bool StartsWith (string value, StringComparison comparisonType);
>
>
>
> JS
>
>
> str.startsWith(searchString[, position])
>
>
>
> Kotlin
>
>
> fun String.startsWith(prefix: String, startIndex: Int =3D 0, ignoreCase:
> Boolean =3D
> false): Boolean
>
>
>
> R
>
>
> startsWith(str, pattern, trim=3DFALSE, ignore.case=3DFALSE)
>
>
>
> Scala
>
>
> startsWith[B](that: GenSeq[B], offset: Int): Boolean
>
>
> Golang, java, C++, Ruby, Swift have simples syntax, like
> string.startsWith(prefix)
>
>
>
> C#, Kotlin, R uses flag for ignore case.
>
>
> Anyway, I can't find language from various TOP-lists where present separ=
ate
> function for case insensitive operations.
>
>
> Another note - I see that many languages provide =E2=80=9Cstart_index=E2=
=80=9D parameter
> for
> start_with functions.
>
>
> So=E2=80=A6 As I say - this is good rfc in perspective, but more discuss=
ion is
> needed.

FTR, there is already substr_compare().

Thanks,
Christoph