Learn how to use the string.concat() method in React JS to concatenate two strings. This function app demonstrates how to concatenate the text 'FONTAWESOME' and 'ICON' using the concat() method. Click the button to see the combined string result.
...2:concat() 方法 concat() 方法用于连接两个或多个字符串,此方法不改变现有的字符串,返回拼接后的新的字符串。 <!...4:substring() 返回位于String对象中指定位置的子字符串,作用是提取字符串的子串,和slice一样也是留头不留尾 string) 返回String对象内最后一次出现子字符串位置。如果没有找到子字符串,...
Methods which return new arrays, like slice or concat, instead return new immutable collections.const { List } = require('immutable'); const list1 = List([1, 2]); const list2 = list1.push(3, 4, 5); const list3 = list2.unshift(0); const list4 = list1.concat(list2, list3);...
1. var oStringObject = new String("hello "); var sResult = oStringObject.concat("world"); alert(sResult); //输出 "hello world" alert(oStringObject); //输出 "hello " 1. 在上面这段代码中,调用 concat() 方法返回的是 "hello world",而 String 对象存放的仍然是 "hello "。出于这种原因...
concat concat(nodes, [node2, ...]) ⇒ self Modify the collection by adding elements to it. If any of the arguments is an array, its elements are merged into the current collection. This is a Zepto-provided method that is not part of the jQuery API. contents v1.0+ contents() ...
concat concat(nodes, [node2, ...]) ⇒ self 添加元素到一个Zepto对象集合形成一个新数组。如果参数是一个数组,那么这个数组中的元素将会合并到Zepto对象集合中。 这是一个Zepto提供的方法,不是jquey的API 。 contents v1.0+ contents() ⇒ collection 获得每个匹配元素集合元素的子元素,包括文字和...
Class Method: Buffer.concat(list[, totalLength]) Class Method: Buffer.from(array) Class Method: Buffer.from(arrayBuffer[, byteOffset[, length]]) Class Method: Buffer.from(buffer) Class Method: Buffer.from(str[, encoding]) Class Method: Buffer.isBuffer(obj) Class Method: Buffer.isEncoding(en...
{0,2}js)$/))&&6===n.length?(d="".concat(n[1],".integrity.json"),i="@".concat(n[4]),l=window.fetch,t=function(e){if(!e.ext||!e.ext[i]||!e.ext[i].file)throw Error("Error Loading JSON response");var t=e.ext[i].integrity||null;s(o=n[2]+e.ext[i].file,t)...
.concat(arr2.filter(x=>!arr1.includes(x)));// 补集// 并集 https://stackoverflow.com/questions/8024102/javascript-compare-strings-and-get-end-difference https://stackoverflow.com/questions/2167602/optimum-way-to-compare-strings-in-javascript ...
数组常见点总结 返回新数组: slice concat filter 不会改变原数组的方法有 slice concat + findindex(indexof lastindexof) + 所有数组循环方法(some every forEach filter map reduce) Array.from使用hasOwnProperty 只遍历对象本身属性而不是原型//for in 应用于数组 Array.prototype.sayHello = function(){ con...