prototypejs和例子代码

<script src="prototype.js"></script> <script> /*var arr = [1,2,3,4,8,5,4,3]; // 依次输出1,2,3,4,5,4,3 arr.each( function (item, index) { if (item < 6) { alert(item); } else { throw $continue; } } ); // 依次输出1,2,3,4 arr.each( function (item, index) { if (item < 6) { alert(item); } else { throw $break; } } );*/ /* var arr = [1,2,3,4,5]; // arr = [1,2,3,4,5] arr.reverse(false); alert(arr.inspect()); // arr = [5,4,3,2,1] arr.reverse(); alert(arr.inspect()); var arr = [1,2,3,4,5]; arr.reverse(); // 返回2在arr中的序号：1 var index = arr.indexOf(2); alert(index) var arr = [1,2,3,4,5]; // 不包含2和4，返回[1,3,5] var newArr = arr.without(2,4); alert(newArr.inspect()); var arr = [1,2,3,4,5]; arr.clear(); alert(arr[2]); var arr = [1,2,3,4,5]; var arr2 = [2,4,6,8,10]; //[ [1,2],[2,4],[3,6],[4,8],[5,10]] var newArr = arr.zip(arr2); // [[1,4],[4,16],[9,36],[16,64],[25,100]] var newArr2 = arr.zip( arr2, function (item) { var newItem = item.collect( function (item, index) { return item * item; } ); return newItem; } ); alert(newArr.inspect()); alert(newArr2.inspect()); var arr = [5,2,3,1,4]; // 将arr排序 var arr = arr.sortBy( function (item, index) { return item; } ); arr.each( function (item, index) { alert(item); } ); var arr = [ {root: 1, square: 1}, {root: 2, square: 4}, {root: 3, square: 9}, {root: 4, square: 16}, {root: 5, square: 25} ]; var newArr = arr.pluck("square"); alert(newArr[4]); var arr = [1,2,3,4,5]; var ptArr = arr.partition( function (item, index) { return item%2 == 1; } ); var oddArr = ptArr[0]; var evenArr = ptArr[1]; oddArr.each( function (item) { alert(item); } ); evenArr.each( function (item) { alert(item); } ); var arr = [1,2,3,4,5]; // 最大值 var max = -arr.min( function (item, index) { return -item; } ); // 最小值 var min = arr.min(); alert(max); alert(min); var arr = [1,2,3,4,5]; // 最大值 var max = arr.max(); // 最小值 var min = -arr.max( function (item, index) { return -item; } ); alert(max); alert(min); // 求集合中每一个元素的平方 Number.prototype.square = function () { return this * this; } var arr = [1,2,3,4,5]; var newArr = arr.invoke("square"); alert(newArr[4]); // 计算arr中所有数的乘积 var factorial = arr.inject( 1, function (accumulator, item, index) { return accumulator * item; } ); alert(factorial) // 判断集合中是否包含”2“ var inc = arr.include(2); alert(inc); var arr = ["12345", "abc2", "cde", "fgh", "132ba"]; var newArray = arr.grep( /2/, function (item, index) { return item + " contains 2"; } ) newArray.each( function (item) { alert(item); } ); var arr = [1,2,3,4,5]; // 返回集合中所有的奇数 var oddArr = arr.findAll( function (item, index) { return item%2 == 1; } ); alert(oddArr[2]); // 返回第一个大于3的元素 var ele = arr.find( function (item, index) { return (item > 3); } ); alert(ele); var newArr = arr.collect( function (item, index) { return item * (index + 1); } ); var hasNegative = arr.any( function (item, index) { return (item < 0); } ); // 测试集合中的所有元素是否大于0 var allPositive = arr.all( function(item, index) { return (item > 0); } ) alert(allPositive); arr.each( function (item, index) { alert("arr[" + index + "] = " + item); } );*/ </script>