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PO
primarykey
Id
15491832
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
14
CommunityOwnedDate
CreationDate
2013-03-19T05:04:09.130
FavoriteCount
0
LastActivityDate
2018-03-22T10:00:28.897
LastEditDate
2018-03-22T10:00:28.897
LastEditorUserId
271200
OwnerUserId
390330
ParentId
15490560
PostTypeId
2
Score
318
ViewCount
0
LastEditorDisplayName
text
Body
<h2>TypeScript 2.4</h2> <p>Now has string enums so your code just works: </p> <pre><code>enum E { hello = "hello", world = "world" }; </code></pre> <p></p> <h2>TypeScript 1.8</h2> <p>Since TypeScript 1.8 you can use string literal types to provide a reliable and safe experience for named string values (which is partially what enums are used for). </p> <pre><code>type Options = "hello" | "world"; var foo: Options; foo = "hello"; // Okay foo = "asdf"; // Error! </code></pre> <p>More : <a href="https://www.typescriptlang.org/docs/handbook/advanced-types.html#string-literal-types" rel="noreferrer">https://www.typescriptlang.org/docs/handbook/advanced-types.html#string-literal-types</a></p> <h2>Legacy Support</h2> <p>Enums in TypeScript are number based. </p> <p>You can use a class with static members though: </p> <pre><code>class E { static hello = "hello"; static world = "world"; } </code></pre> <p>You could go plain as well: </p> <pre><code>var E = { hello: "hello", world: "world" } </code></pre> <p><strong>Update:</strong> Based on the requirement to be able to do something like <code>var test:E = E.hello;</code> the following satisfies this: </p> <pre><code>class E { // boilerplate constructor(public value:string){ } toString(){ return this.value; } // values static hello = new E("hello"); static world = new E("world"); } // Sample usage: var first:E = E.hello; var second:E = E.world; var third:E = E.hello; console.log("First value is: "+ first); console.log(first===third); </code></pre>
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