I’ve used the _ (underscore) previously in code – particularly with F# tuples but also C#. It is used to denote a value that is intentionally unused, ignored, discarded.<\/p>\n
It seems that the underscore used in such situations has a name (maybe it has the same name in other languages, I’ve not yet checked). It’s called a discard<\/strong>.<\/p>\n Note: With regard to its use in C#, it appeared with C# 7.0.<\/em><\/p>\n Let’s have a look at a very simple example<\/p>\n This slightly contrived example (the best I could think of quickly) shows how this might be used. In this example we’re not interested in the out<\/em> value so just use a discard<\/strong> to basically say “this is unused, ignore it”.<\/p>\n Note: The discard doesn’t need a var<\/em> or type.<\/em><\/p>\n Obviously the discard comes in very useful with tuples. I guess, for C#, this became most useful when tuples became a first class language feature. <\/p>\n So for example we might have this code<\/p>\n I’ve used the _ (underscore) previously in code – particularly with F# tuples but also C#. It is used to denote a value that is intentionally unused, ignored, discarded. It seems that the underscore used in such situations has a name (maybe it has the same name in other languages, I’ve not yet checked). It’s […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[49,3],"tags":[],"class_list":["post-8138","post","type-post","status-publish","format-standard","hentry","category-net","category-c"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/posts\/8138","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/comments?post=8138"}],"version-history":[{"count":2,"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/posts\/8138\/revisions"}],"predecessor-version":[{"id":8145,"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/posts\/8138\/revisions\/8145"}],"wp:attachment":[{"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/media?parent=8138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/categories?post=8138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/tags?post=8138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\r\npublic bool IsNumber => Double.TryParse("123", out _);\r\n<\/pre>\n\r\npublic (string, string, int) GetPerson()\r\n{\r\n return ("Scooby", "Doo", 13);\r\n}\r\n\r\n\/\/ in use we only want the age\r\nvar (_, _, age) = GetPerson();\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"