• Jolly James (1/1) Apr 30 2017 Is there a String Comparison Operator in D?
• =?UTF-8?B?54Sh?= (2/3) Apr 30 2017 ~
• Xinok (6/7) Apr 30 2017 Yeah, just the usual comparison operators:
• bauss (11/18) Apr 30 2017 Just to clarify.
• ag0aep6g (15/24) Apr 30 2017 [...]
• Xinok (7/30) Apr 30 2017 Regarding concatenation vs appending, it's kind of both depending
• tcak (4/5) Apr 30 2017 You normally use double equation marks (==) to do that.

Jolly James <j.j jmail.com> writes:

Is there a String Comparison Operator in D?

=?UTF-8?B?54Sh?= <mu mu.co.jp> writes:

On Sunday, 30 April 2017 at 15:31:39 UTC, Jolly James wrote:
 Is there a String Comparison Operator in D?

~

Xinok <xinok live.com> writes:

On Sunday, 30 April 2017 at 15:31:39 UTC, Jolly James wrote:
 Is there a String Comparison Operator in D?

Yeah, just the usual comparison operators:

"abc" == "abc"
"abc" != "ABC"


~ is for string concatenation, i.e.:

"abc" ~ "def" == "abcdef"

bauss <jj_1337 live.dk> writes:

On Sunday, 30 April 2017 at 16:15:41 UTC, Xinok wrote:
 On Sunday, 30 April 2017 at 15:31:39 UTC, Jolly James wrote:
 Is there a String Comparison Operator in D?

 Yeah, just the usual comparison operators:

 "abc" == "abc"
 "abc" != "ABC"


 ~ is for string concatenation, i.e.:

 "abc" ~ "def" == "abcdef"

Just to clarify.

It's not actually a string concatenation operator, it's an array 
appending operator.

Strings are just an alias for immutable(char)[] and not actually 

are objects.

In fact it doesn't have any operators that doesn't work with any 
other type of arrays. Just like functions such as replace etc. 
aren't necessarily string functions, but works with any type of 
arrays.

ag0aep6g <anonymous example.com> writes:

On 04/30/2017 09:05 PM, bauss wrote:
 On Sunday, 30 April 2017 at 16:15:41 UTC, Xinok wrote:

[...]
 ~ is for string concatenation, i.e.:


[...]
 It's not actually a string concatenation operator, it's an array
 appending operator.

Appending is related but distinct. `~` does concatenation. `~=` does 
appending.

https://dlang.org/spec/arrays.html#array-concatenation

 Strings are just an alias for immutable(char)[] and not actually a type


I get what you mean, but while we're splitting hairs: `string` 
definitely is a type. It's the same type as `immutable(char)[]`.

 In fact it doesn't have any operators that doesn't work with any other
 type of arrays. Just like functions such as replace etc. aren't
 necessarily string functions, but works with any type of arrays.

Not an operator, but `foreach` has special support for transcoding 
between the different UTF variants.

Regarding functions, narrow strings (`string`, `wstring`) are special 
cased all over phobos. It's because as ranges they have dchar elements, 
but as arrays they have char/wchar elements. std.array.replace [1] also 
mentions strings in its signature because of this.



[1] https://dlang.org/phobos/std_array.html#.replace

Xinok <xinok live.com> writes:

On Sunday, 30 April 2017 at 19:05:18 UTC, bauss wrote:
 On Sunday, 30 April 2017 at 16:15:41 UTC, Xinok wrote:
 On Sunday, 30 April 2017 at 15:31:39 UTC, Jolly James wrote:
 Is there a String Comparison Operator in D?

 Yeah, just the usual comparison operators:

 "abc" == "abc"
 "abc" != "ABC"


 ~ is for string concatenation, i.e.:

 "abc" ~ "def" == "abcdef"

 Just to clarify.

 It's not actually a string concatenation operator, it's an 
 array appending operator.

 Strings are just an alias for immutable(char)[] and not 

 strings are objects.

 In fact it doesn't have any operators that doesn't work with 
 any other type of arrays. Just like functions such as replace 
 etc. aren't necessarily string functions, but works with any 
 type of arrays.

Regarding concatenation vs appending, it's kind of both depending 
on the type of the operands. What I mean is all of the following 
are valid:

[10, 20] ~ [30, 40] == [10, 20, 30, 40]  // Concatenation
[10, 20] ~ 30       == [10, 20, 30]      // Appending
10 ~ [20, 30]       == [10, 20, 30]      // Prepending

tcak <6uqekg+anzstagnqueug sharklasers.com> writes:

On Sunday, 30 April 2017 at 15:31:39 UTC, Jolly James wrote:
 Is there a String Comparison Operator in D?

You normally use double equation marks (==) to do that.

auto name = "Jack";
if( name == "Jack" ) writeln("Hi Jack!");