WebDec 14, 2011 · There are many ways to loop over an alist and act on some or all of its entries. You show one way yourself. Look also at while and, in particular, dolist. This is your example using dolist: (let ( (res ())) (dolist (x my-list) (push (cons (cdr x) (car x)) res)) (nreverse res)) (There is probably a better way to use loop than in your example ... WebFeb 26, 2013 · List.Reverse doesn't return anything - it reverses the list in place.. If you want to use the LINQ version of Reverse which returns a reversed sequence but without mutating the existing list, you could use:. foreach (IEnumerable row in Items) { foreach (Foo item in row.Reverse()) { ... } } Or perhaps more clearly:

How to exit a loop in lisp once the function is performed?

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PHP simple foreach循环不起作用_Php_Mysql_Pdo_Foreach - 多多扣

WebApply the expression to every item in the list. This function performs an expression on each of the elements of the list. The first argument for foreach is variable. This is a temporary … WebApply the expression to every item in the list. This function performs an expression on each of the elements of the list. The first argument for foreach is variable. This is a temporary variable where the changed elements are stored. Next is the list argument, containing the elements to be affected. Following the list are one or more expression ... WebAug 7, 2024 · Add a comment. 2. dolist is not destructive, and that is probably the most idiomatic way in Emacs Lisp, or Common Lisp for that matter, to loop over a list when you just want to do something with each member in turn: (setq *properties* ' (prop1 prop2 prop3)) (dolist (p *properties*) (print p)) The seq-doseq function does the same thing as ... the home depot commack road deer park ny