constarray1=['a','b','c'];array1.forEach(element=>console.log(element));// expected output: "a"// expected output: "b"// expected output: "c" 2.map 该Array.map()方法允许您循环访问数组并使用回调函数修改其元素。然后将对数组的每个元素执行回调函数。 代码语言:javascript 代码运行次数:0...
const url = document.getElementById('queryURL').value;const myData = tf.data.csv(url); ***1***await myData.take(10).forEach(x => console.log(JSON.stringify(x))); ***2***// Output is like// {"crim":0.26169,"zn":0,"indus":9.9,"chas":0,"nox":0.544,"rm":6.023, ......
parse(stdout); } catch (e) { ret = { result: 'JSON Error (data was "'+stdout+'")', console: [] } } hollaback(ret); } }); }); // Go self.child.stdin.write(code); self.child.stdin.end(); // Send a message to the code running inside the sandbox // This message will ...
例如: /*** Adds two numbers together.* @example* Here's a simple example:* ```* // Prints "2":* console.log(add(1,1));* ```* @example* Here's an example with negative numbers:* ```* // Prints "0":* console.log(add(1,-1));* ```*/export function add(x: number, ...
export function returnArrayAsync() { DotNet.invokeMethodAsync('BlazorSample', 'ReturnArrayAsync') .then(data => { console.log(data); }); } export function addHandlers() { const btn = document.getElementById("btn"); btn.addEventListener("click", returnArrayAsync); } addHandlersJS ...
array1,...Required. The array(s) to be concatenated. Return Value TypeDescription ArrayThe content from the joined arrays. More Examples Concatenate strings and numbers: constarr1 = ["Cecilie","Lone"]; constarr2 = [1,2,3]; constarr3 = arr1.concat(arr2); ...
If you guess that theconsole.log()call would either outputundefinedor throw an error, you guessed incorrectly. Believe it or not, it will output10. Why? In most other languages, the code above would lead to an error because the “life” (i.e., scope) of the variableiwould be restrict...
The JavaScript Array Object The Array object is used to store multiple values in a single variable. Example constcars = ["Saab","Volvo","BMW"]; Try it Yourself » JavaScript Array Methods and Properties NameDescription [ ]Creates a new Array ...
firstconstsecond=newMap([[1,"uno"],[2,"dos"],]);// Map 对象同数组进行合并时,如果有重复的键值,则后面的会覆盖前面的。constmerged=newMap([...first,...second,[1,"eins"]]);console.log(merged.get(1));// einsconsole.log(merged.get(2));// dosconsole.log(merged.get(3));// thre...
jsCopy to Clipboard // 在网页浏览器中,window 对象也是全局对象: console.log(this === window); // true this.b = "MDN"; console.log(window.b); // "MDN" console.log(b); // "MDN" 如果源代码作为模块加载(对于 HTML,这意味着在 <script> 标签中添加 type="module"),在顶层,this 总是...