ActivityPub Viewer

A small tool to view real-world ActivityPub objects as JSON! Enter a URL or username from Mastodon or a similar service below, and we'll send a request with the right Accept header to the server to view the underlying object.

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{ "@context": [ "https://www.w3.org/ns/activitystreams", { "ostatus": "http://ostatus.org#", "atomUri": "ostatus:atomUri", "inReplyToAtomUri": "ostatus:inReplyToAtomUri", "conversation": "ostatus:conversation", "sensitive": "as:sensitive", "toot": "http://joinmastodon.org/ns#", "votersCount": "toot:votersCount", "Hashtag": "as:Hashtag" } ], "id": "https://mathstodon.xyz/users/xameer/statuses/110876525009302164", "type": "Note", "summary": "I am not fully convinced here , maybe lazy eval is a cult", "inReplyTo": null, "published": "2023-08-12T11:58:27Z", "url": "https://mathstodon.xyz/@xameer/110876525009302164", "attributedTo": "https://mathstodon.xyz/users/xameer", "to": [ "https://www.w3.org/ns/activitystreams#Public" ], "cc": [ "https://mathstodon.xyz/users/xameer/followers" ], "sensitive": true, "atomUri": "https://mathstodon.xyz/users/xameer/statuses/110876525009302164", "inReplyToAtomUri": null, "conversation": "tag:mathstodon.xyz,2023-08-12:objectId=61398093:objectType=Conversation", "content": "<p>In a lazy evaluation scheme, the evaluation of an expression is deferred until the<br />value of the expression is actually needed elsewhere in the computation. That<br />is, the expression is evaluated on demand. This contrasts with what is called<br />eager evaluation in which an expression is evaluated as soon as its inputs are<br />available.<br />For example, if eager evaluation is used, an argument (which may be an arbi-<br />trary expression) of a function call is evaluated before the body of the function.<br />If lazy evaluation is used, the argument is not evaluated until the value is actu-<br />ally needed during the evaluation of the function body. If an argument’s value<br />is never needed, then the argument is expression is never evaluated.<br />Why should we care? Well, this facility allows programmers to construct and<br />use data structures that are conceptually unbounded or infinite in size. As<br />long as a program never actually needs to inspect the entire structure, then a<br />terminating computation is still possible.<br />For example, we might define the list of natural numbers as a list beginning<br />with 0, followed by the list formed by adding one to each element of the list of<br />natural numbers.<br />Lazy evaluation thus allows programmers to separate the data from the control.<br />They can define a data structure without having to worry about how it is<br />processed and they can define functions that manipulate the data structure<br />without having to worry about its size or how it is created. This ability to<br />separate the data from the control of processing enables programs to be highly<br />modular<br /><a href=\"https://mathstodon.xyz/tags/haskell\" class=\"mention hashtag\" rel=\"tag\">#<span>haskell</span></a><br /><a href=\"https://john.cs.olemiss.edu/~hcc/csci450/notes/haskell_notes.pdf\" target=\"_blank\" rel=\"nofollow noopener noreferrer\" translate=\"no\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">john.cs.olemiss.edu/~hcc/csci4</span><span class=\"invisible\">50/notes/haskell_notes.pdf</span></a></p>", "contentMap": { "en": "<p>In a lazy evaluation scheme, the evaluation of an expression is deferred until the<br />value of the expression is actually needed elsewhere in the computation. That<br />is, the expression is evaluated on demand. This contrasts with what is called<br />eager evaluation in which an expression is evaluated as soon as its inputs are<br />available.<br />For example, if eager evaluation is used, an argument (which may be an arbi-<br />trary expression) of a function call is evaluated before the body of the function.<br />If lazy evaluation is used, the argument is not evaluated until the value is actu-<br />ally needed during the evaluation of the function body. If an argument’s value<br />is never needed, then the argument is expression is never evaluated.<br />Why should we care? Well, this facility allows programmers to construct and<br />use data structures that are conceptually unbounded or infinite in size. As<br />long as a program never actually needs to inspect the entire structure, then a<br />terminating computation is still possible.<br />For example, we might define the list of natural numbers as a list beginning<br />with 0, followed by the list formed by adding one to each element of the list of<br />natural numbers.<br />Lazy evaluation thus allows programmers to separate the data from the control.<br />They can define a data structure without having to worry about how it is<br />processed and they can define functions that manipulate the data structure<br />without having to worry about its size or how it is created. This ability to<br />separate the data from the control of processing enables programs to be highly<br />modular<br /><a href=\"https://mathstodon.xyz/tags/haskell\" class=\"mention hashtag\" rel=\"tag\">#<span>haskell</span></a><br /><a href=\"https://john.cs.olemiss.edu/~hcc/csci450/notes/haskell_notes.pdf\" target=\"_blank\" rel=\"nofollow noopener noreferrer\" translate=\"no\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">john.cs.olemiss.edu/~hcc/csci4</span><span class=\"invisible\">50/notes/haskell_notes.pdf</span></a></p>" }, "attachment": [], "tag": [ { "type": "Hashtag", "href": "https://mathstodon.xyz/tags/haskell", "name": "#haskell" } ], "replies": { "id": "https://mathstodon.xyz/users/xameer/statuses/110876525009302164/replies", "type": "Collection", "first": { "type": "CollectionPage", "next": "https://mathstodon.xyz/users/xameer/statuses/110876525009302164/replies?only_other_accounts=true&page=true", "partOf": "https://mathstodon.xyz/users/xameer/statuses/110876525009302164/replies", "items": [] } }, "likes": { "id": "https://mathstodon.xyz/users/xameer/statuses/110876525009302164/likes", "type": "Collection", "totalItems": 5 }, "shares": { "id": "https://mathstodon.xyz/users/xameer/statuses/110876525009302164/shares", "type": "Collection", "totalItems": 1 } }