just returnit.” The quote is necessary because lists are special in Clojure. When Clojure evaluates a list, it tries to interpret the first element of this list as a function (or macro) and the remainder of the list as arguments.
return apply('array_merge', $arrs); } /** * cons(truct) * Returns a new array where x is the first element and $arr is the rest. */ function cons($x, array $arr) { return concat(array($x), $arr); } /** * conj(oin) * Returns a new arr with the xs added. * @param...
first()) return args.next(); args = RT.next(args); args = RT.next(args); } return null; } 代码示例来源:origin: org.dunaj/clojure public Object nextElement(){ Object ret = RT.first(seq); seq = RT.next(seq); return ret; } } 代码示例来源:origin: org.dunaj/clojure public ...
Our currentm-bindintroduces a level of sequence nesting and also takes one away. Its result therefore has as many levels of nesting as the return value of the function that is called. The final result of our expression has as many nesting values as(* a b)– which means none at all. I...
解压后用命令行进入到clojure目录下，输入下面命令进入REPL命令行交互界面： javClojure —— 新世纪...
first: returns the first element of an RDD. count: returns the number of elements in an RDD. collect: returns all the elements of an RDD as an array at the driver process. distinct: returns a new RDD that contains the distinct elements of the source RDD. ...
It then invokes (f init x0) where x0 is the first element in xs. f returns a new accumulator value acc1, which is then passed to (f acc1 x1) to produce a new accumulator acc2, and so on until every x in xs is folded into the accumulator. That accumulator is the return value...
You can see that the :render key points to a function that will return the :canvas element when data is available.The :component-did-mount and :component-did-update keys point to the render-chart function that w'll write next:(defn render-chart [chart data] (fn [component] (when (not...
(require '[criterium.core :refer [quick-benchmark]]) (require '[com.hypirion.clj-xchart :as c]) #1 (defmacro b [expr] #2 `(first (:mean (quick-benchmark ~expr {}))) (defn sample [c] #3 (for [n (range 100000 1e6 100000)] (b (into c (range n))) (c/view #4 (c/...
It then uses map first to get the first element of each pair, the error message. Here it is in action: (error-messages-for "" ["Please enter a name" not-empty]) ; => ("Please enter a name") Now we need to accumulate these error messages in a map. Here’s the complete ...