Yes. It uses the same syntax as lifetimes.

    fn main() {
        &#39;outer: for x in 0..5 {
            &#39;inner: for y in 0..5 {
                println!(&quot;{},{}&quot;, x, y);
                if y == 3 {
                    break &#39;outer;
                }
            }
        }
    }


See [loop labels documentation][1] and the related section of [the reference][2].


  [1]: https://doc.rust-lang.org/1.30.0/book/first-edition/loops.html#loop-labels
  [2]: https://doc.rust-lang.org/reference/expressions/loop-expr.html#loop-labels

I consume an API which returns the string values like this:
&gt; `some-enum-value`

I try to put these values in an `enum` , since the default `StringEnumConverter` doesn&#39;t do what I want, which is to to decorate this Converter with some additional logic. 

How can I be sure that the values are *deserialized* correctly ?

The following code is my tryout to get this job done.
&lt;br&gt;
However the line
&gt; `reader = new JsonTextReader(new StringReader(cleaned));` 

breaks the whole thing since the `base.ReadJson` can&#39;t recognize the string as a JSON.

Is there a better way to do this without having to implement all the existing logic in a `StringEnumConverter`?
&lt;br&gt;
How could I fix my approach?

    public class BkStringEnumConverter : StringEnumConverter
    {
        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
        {
            if (reader.TokenType == JsonToken.String)
            {
                var enumString = reader.Value.ToString();
                if (enumString.Contains(&quot;-&quot;))
                {
                    var cleaned = enumString.Split(&#39;-&#39;).Select(FirstToUpper).Aggregate((a, b) =&gt; a + b);
                    reader = new JsonTextReader(new StringReader(cleaned));
                }
            }
            return base.ReadJson(reader, objectType, existingValue, serializer);
        }

        private static string FirstToUpper(string input)
        {
            var firstLetter = input.ToCharArray().First().ToString().ToUpper();
            return string.IsNullOrEmpty(input)
                ? input
                : firstLetter + string.Join(&quot;&quot;, input.ToCharArray().Skip(1));
        }
    }

How to make JSON.NET StringEnumConverter use hyphen-separated casing

I&#39;m learning data structures and every source tells me not to use index 0 of the array while implementing heap, without giving any explanation why. I searched the web, searched StackExchange, and couldn&#39;t find an answer.

Why in a heap implemented by array the index 0 is left unused?

Is there a way to have nested `for` loops in Rust and break the outer one from inside the inner one, the way one could do e.g. in Java? I know Rust supports named breaks in `loop` but I can&#39;t seem to find information about the same regarding `for`.

Named breaks in for loops in Rust

<p>Is there a way to have nested <code>for</code> loops in Rust and break the outer one from inside the inner one, the way one could do e.g. in Java? I know Rust supports named breaks in <code>loop</code> but I can't seem to find information about the same regarding <code>for</code>.</p>


How can one remove selected keys from a map?
Is it safe to combine `delete()` with range, as in the code below?

    package main
    
    import &quot;fmt&quot;
    
    type Info struct {
    	value string
    }
    
    func main() {
    	table := make(map[string]*Info)
    	
    	for i := 0; i &lt; 10; i++ {
    		str := fmt.Sprintf(&quot;%v&quot;, i)
    		table[str] = &amp;Info{str}
    	}
    
    	for key, value := range table {
    		fmt.Printf(&quot;deleting %v=&gt;%v\n&quot;, key, value.value)
    		delete(table, key)
    	}
    }

https://play.golang.org/p/u1vufvEjSw

Is it safe to remove selected keys from map within a range loop?

I&#39;ve seen plenty of questions that suggest using:

    for (var i = 0; i &lt; myArray.length; i++){ /* ... */ }

instead of:

    for (var i in myArray){ /* ... */ }

for arrays, due to inconsistent iteration ([see here](https://stackoverflow.com/questions/242841/javascript-for-in-vs-for)).

----

However, I can&#39;t seem to find anything that seems to prefer the object oriented loop:

    myArray.forEach(function(item, index){ /* ... */ });

Which seems way more intuitive to me.

For my current project, IE8 compatibilty is important, and I&#39;m considering using [Mozilla&#39;s polyfill](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach#Polyfill), however I&#39;m not 100% sure how this will work.

 - Are there any differences between the standard for loop (the first example above) and the Array.prototype.forEach implementation by modern browsers?
 - Are there any difference between modern browser implementations and Mozilla&#39;s implementation linked to above (with special regard to IE8)?
 - Performance is not as much of an issue, just consistency with which properties are iterated over.

JavaScript - Nuances of myArray.forEach vs for loop

What is the pythonic way of looping through a range of numbers and skipping over one value?  For example, the range is from 0 to 100 and I would like to skip 50.

Edit:
Here&#39;s the code that I&#39;m using

    for i in range(0, len(list)):
        x= listRow(list, i)
        for j in range (#0 to len(list) not including x#)
            ...

Skip over a value in the range function in python

This is more of a conceptual question. I recently saw a piece of code in Python (it worked in 2.7, and it might also have been run in 2.5 as well) in which a `for` loop used the same name for both the list that was being iterated over and the item in the list, which strikes me as both bad practice and something that should not work at all.

For example:

    x = [1,2,3,4,5]
    for x in x:
        print x
    print x
Yields:

    1
    2
    3
    4
    5
    5

Now, it makes sense to me that the last value printed would be the last value assigned to x from the loop, but I fail to understand why you&#39;d be able to use the same variable name for both your parts of the `for` loop and have it function as intended. Are they in different scopes? What&#39;s going on under the hood that allows something like this to work?


Why can I use the same name for iterator and sequence in a Python for loop?

Python has an interesting `for` statement which lets you specify an `else` clause.

In a construct like this one:

    for i in foo:
      if bar(i):
        break
    else:
      baz()

the `else` clause is executed after the `for`, but only if the `for` terminates normally (not by a `break`).

I wondered if there was an equivalent in C++? Can I use `for ... else`?

Is there an equivalent to the &quot;for ... else&quot; Python loop in C++?

In Kotlin, I cannot do a `break` or `continue` within a function loop and my lambda -- like I can from a normal `for` loop.  For example, this does not work:

&lt;!-- language-all: kotlin --&gt;

    (1..5).forEach {
        continue@forEach  // not allowed, nor break@forEach
    }

There are [old documentation](https://confluence.jetbrains.com/display/Kotlin/Returns+and+jumps#Returnsandjumps-Breakandcontinueincustomcontrolstructures) that mentions this being available but it appears it was never implemented.  What is the best way to get the same behavior when I want to `continue` or `break` from within the lambda?

**Note:** *this question is intentionally written and answered by the author ([Self-Answered Questions](https://blog.stackoverflow.com/2011/07/its-ok-to-ask-and-answer-your-own-questions/)), so that the idiomatic answers to commonly asked Kotlin topics are present in SO.  Also to clarify some really old answers written for alphas of Kotlin that are not accurate for current-day Kotlin.*

How do I do a &quot;break&quot; or &quot;continue&quot; when in a functional loop within Kotlin?

Visual Studio 2017 breaks in debug mode and displays the message:

&gt; Your app has entered a break state, but there is no code to show
&gt; because all threads were executing external code (typically system or
&gt; framework code).

The message is in the `Break Mode Window`.

What to do?

Your app has entered a break state, but there is no code to show because all threads were executing external code (typically system or framework code)

I have a the below code, on which i am unable to break the loop on certain conditions.

     isVoteTally(): boolean {
   

     let count = false;
        this.tab.committee.ratings.forEach(element =&gt; {
    
          const _fo = this.isEmptyOrNull(element.ratings.finalOutcome.finaloutlook);
          const _foreign = this.isEmptyOrNull(element.ratings.finalOutcome.foreign);
          const _local = this.isEmptyOrNull(element.ratings.finalOutcome.local);
          const _tally = element.ratings.finalOutcome.voteTally.maj + element.ratings.finalOutcome.voteTally.dis;
    
          if (_fo == false &amp;&amp; _foreign == false &amp;&amp; _local == false) {
            if (_tally &gt; 0) {
              **return count = false;**
            }
          } else {
            if (_tally &lt; 0) {
              **return count = false;**
            }
          }
        });
        return count;
      }

On the star-marked area, i want to *break* the code and return the boolean value, but i am unable to do it right now. Can anybody help me.

Thanks in advance.




How to break ForEach Loop in TypeScript

How to convert `Vec&lt;char&gt;` to string form so that I can print it?

How to convert Vec&lt;char&gt; to a string

When I try to declare a struct inside of another struct:

```
struct Test {
    struct Foo {}
}
```

The compiler complains: 

```none
error: expected identifier, found keyword `struct`
 --&gt; src/lib.rs:2:5
  |
2 |     struct Foo {}
  |     ^^^^^^ expected identifier, found keyword
help: you can escape reserved keywords to use them as identifiers
  |
2 |     r#struct Foo {}
  |     ^^^^^^^^

error: expected `:`, found `Foo`
 --&gt; src/lib.rs:2:12
  |
2 |     struct Foo {}
  |            ^^^ expected `:`
```

I could not find any documentation in either direction; are nested structs even supported in Rust?

Are nested structs supported in Rust?

When I tried to add a const array in the global scope using this code:

    static NUMBERS: [i32] = [1, 2, 3, 4, 5];

I got the following error:

    error: mismatched types:
     expected `[i32]`,
        found `[i32; 5]`
    (expected slice,
        found array of 5 elements) [E0308]

    static NUMBERS2: [i32] = [1, 2, 3, 4, 5];
                             ^~~~~~~~~~~~~~~

The only way I found to deal with this problem is to specify the length in the type:

    static NUMBERS: [i32; 5] = [1, 2, 3, 4, 5];

Is there a better way? It should be possible to create an array without manually counting its elements.

How to specify const array in global scope in Rust?

That might be the dumbest Rustlang question ever but I promise I tried my best to find the answer in the documentation or any other place on the web.

I can convert a string to a vector of bytes like this:

    let bar = bytes!(&quot;some string&quot;);

Unfortunately I can&#39;t do it this way


    let foo = &quot;some string&quot;;
    let bar = bytes!(foo);

Because `bytes!` expects a string literal.

But then, how do I get my foo converted into a vector of bytes?

How do I convert a string into a vector of bytes in rust?

How do I convert a `String` into a `&amp;str`? More specifically, I would like to convert it into a `str` with the `static` lifetime (`&amp;&#39;static str`).

Content Type	Original Author	Original Content on Stackoverflow
Question	Arets Paeglis	View Question on Stackoverflow
Solution 1 - For Loop	Lily Ballard	View Answer on Stackoverflow

Named breaks in for loops in Rust

For Loop Problem Overview

For Loop Solutions

Solution 1 - For Loop

Why in a heap implemented by array the index 0 is left unused?

How to make JSON.NET StringEnumConverter use hyphen-separated casing

Attributions