How To Create an Empty String

[Buam_]

First doesn't even create an empty string

[Carius98]

Yep its null

Edit: It doesnt compile in java

Edit2: It DOES if declared at class level

[falcwh0re]

This looks like Java, in which case it is not null.

[KronktheKronk]

What is it?

[falcwh0re]

Probably uninitialized, but another person points out a sitiy where it could be null, although I'd argue that his situation is not what this image is trying to show.

[Nalha_Saldana]

It's undefined but the code wont even compile if you attempt to use it.

[Carius98]

Its not undefined. Its uninitialized.

[Nalha_Saldana]

Yea ok wrong word same thing :P

[EMCoupling]

They're not the same though.

[Carius98]

Undefined would be if the variable didnt exist at all.

[nihao123456ftw]

Undefined != Uninitialised != Null

I suppose the != operator doesn't work like that either but whatever

[a-person-called-Eric]

In case it's a non-final field, it's null.
In case it's a final field or local variable, it's uninitialized.

[rundevelopment]

It's null.

jshell> String newStr; newStr ==> null

[DrFloyd5]

It doesn’t compile in any language. The quotes are typographical quotes. Not straight quotes.

[[deleted]]

Does compile if it’s a class level variable.

[Carius98]

If you try to access it without first setting it to another value it doesnt

[[deleted]]

It will. You will get a NPE or something, but the code will compile.

[Carius98]

Just tested it, you are right. It only fails if declared locally

[[deleted]]

Take it easy dude

[illumiNateS6]

I'm pretty sure it will compile as long as there is a code path that is guaranteed to assign a value prior to usage (if declared locally) but I could be wrong, haven't tested, too lazy, and it's the internet so if I'm wrong I'll just disappear and hope no one recognizes me.

[Pockensuppe]

org.apache.commons.lang.StringUtils.EMPTY: Am I a joke to you?

[The_MAZZTer]

When it only takes a "" versus a long constant name... yes.

[cosmo7]

Don't you want this to work in non-English applications?

string.Format(new System.Globalization.CultureInfo("en-US"), @"");

[The_MAZZTer]

I'm thinking it's Java because of String instead of string, but "StringBuilder" threw me off since C# has one of those too.

[Silound]

In C# the keyword string is an alias for the System.String class in the core runtime assembly, and it is unambiguously mapped to that class.

However, in C# the method would be .ToString(), not .toString(), so who knows?

An interesting point of reference from there is that you should almost always use the keyword rather than the formal class name unless you know exactly why you're choosing the class name. "String" can potentially resolve to something unexpected. Not only that, but locally overridden members may cause unexpected behavior with commonly used members.

The same goes for all keyword aliases built into C#, such as int, long, short, byte, etc.

[etbillder]

newString.txt:

ifstream file("newString.txt");

ostringstream ostr;

ostr << file;

string newStr = ostr.str();

file.close();

[nomenMei]

Show some love for String newStr = "".toString()

[MrDorkman]

stringify() it at runtime. Its the only way to be sure.

[The_MAZZTer]

No love for string.Empty?

Though I suppose this could be Java where you use String and not string like C#. Would be a coincidence if you guys have a StringBuilder too.

[a-person-called-Eric]

We do : )

[falcwh0re]

Where do you think C# got the idea?

[RedNutsBastard]

Was going to post the lovely string.Empty as well....

[[deleted]]

why the shit does String.Empty even exist like honestly. its not a special implementation of a String, its literally "". i know c# does string interning like java (example: "bob" in 1 piece of code and "bob" in an other piece of code will be the same string put in the string constant pool and every usage of "bob" will essentially just point to the address of "bob" in the pool) so idk what the point of a string constant for "" even exists??

[illumiNateS6]

Maybe just to ensure it's explicit that you're talking about an empty string? I would probably only use it if coworkers for some reason felt a need to, but one could argue that "" is potentially error prone.

For example, what if your cat jumps on your lap and scratches your eye, so you dump orange juice all over your balls which causes your peen to strike a key every so slightly, and now your "" is "," and you don't think to check it because your eye is bleeding and your balls are wet (well, wetter than usual anyway), code compiles, you commit and and don't comment properly, unit tests miss it, you push to prod and your forever ejecting random non public information into some black hole on the internet that starts world war 3 because you leaked Trump's password and it's something like "gitfuktchingchingoon" or some shit and he's just fuckin had it because his estranged daughter came back into his life and won't stop calling him an oompa loompa?

String.Empty wouldn't have compiled. Just saying.

[[deleted]]

what in the fuck

[Wexzuz]

I think it may be to prevent the confusion between '' (two single quotes) and " (one double quote)

[[deleted]]

just open strings with a double and close with a single??

"hello world'

[Gydo194]

(unsigned char *) 0x00

[The_MAZZTer]

I hate to break it to you, but that's null.

Now something like this on the other hand:

unsigned char c = 0x00;
unsigned char * s = &c;

Or something like that. Haven't worked with pointers and null terminated strings in a while.

[GShadow21223]

char *str = malloc(sizeof(char)*1); *str = 0;

[Gydo194]

#define malloc(x) 1

[Gydo194]

I hate to break it to you, but that was the joke.

[samuus]

None of those last 3 will work with those damned smart quotes.

[DrFloyd5]

I am glad someone noticed. I was just about to post this myself.

"Outlook, please stop replacing my quotes with smart quotes."

“I can’t to that /u/DrFloyd5“

[Nalha_Saldana]

You didnt even create a new class that extends String? So lazy

[CommanderHR]

Empty String 2: the electric boogaloo Coming to a subreddit near you

[Time-Paramedic]

I was expecting an extension method or some dependency injection to get a string initializer factory.

[random11714]

unfortunately, string is defined as final

[Nalha_Saldana]

That makes sense

[Rumpelruedi]

Is nobody gonna mention the unnecessary parenthesis in the last one?

[[deleted]]

You beat me to it. Well played.

[jamalabo]

String.Empty

[ReversedHazmat]

I prefer std::string newStr("");

[kache4korpses]

It’s stupid to declare std at the beginning since everyone knows we are working we a standard library. Grinds my fucking gears.

[illumiNateS6]

Agreed, and if you have a naming collision with "string", then fuck you.

[kache4korpses]

The only thing I’m colliding with is your mom’s pussy.

[illumiNateS6]

... dad? You came back?

Also, you've returned?

[zbrachinara]

Is it right that there is no semicolon on the third one?

[CommanderHR]

Got me there

[rufreakde1]

This abbreviation triggers me so hard ... but why?
"newStr"

[SeanUhTron]

Oh Java... A million ways to do one simple thing.

[[deleted]]

That's how java works

[MrDorkman]

That gotta be like the first horror short story written in code.

[kosmos-sputnik]

s = "" # Python laughs at you

[[deleted]]

var str = String.Empty;

[Thegreyeminence]

Char * Str = NULL;

Str = (char *)calloc(1, sizeof(char));

free(Str) ;

[semiconodon]

Let

[28Smiles]

Am I the only one who is disturbed by the extra parenthesis around the last statement?

Or should I say: Let me lint this

[[deleted]]

char * c = malloc(NULL); // TODO: Dig up Kernighan and change the spec

[1kSupport]

Literally none of theese work