Whenodois ran for the first time, you will be asked to opt in to Red Hat's telemetry collection program. With your approval,odowill collect pseudonymized usage data and send it to Red Hat servers to help improve our products and services. Read ourprivacy statementto learn more about it. ...
for-in 语句 for 语句是严格的迭代语句,用于枚举对象的属性。 它的语法如下: for (property in expression) statement 例子: for (sProp in window) { alert(sProp); } 这里,for-in 语句用于显示 window 对象的所有属性。 前面讨论过的 PropertyIsEnumerable() 是 ECMAScript 中专门用于说明属性是否可以用 for...
Notice that the condition statement is i <= n; in order to include the n itself as well. Inside the for loop, we multiply the current value of result with the current value of our index i - performing the operation from the definition in reverse. Finally, we return the final value of...
statement:需执行的语句。如果要执行多条语句,就要用中括号({...})把语句括起来 [incrementExpression]:累计表达式。若存在则执行,然后会回到第2步执行语句 例子 function howMany(selectObject) { var numberSelected = 0; for (var i = 0; i < selectObject.options.length; i++) { if (selectObject...
for-in 语句 for 语句是严格的迭代语句,用于枚举对象的属性。 它的语法如下: </>code for(propertyinexpression)statement 例子: </>code for (sProp in window) { alert(sProp); } 这里,for-in 语句用于显示 window 对象的所有属性。 前面讨论过的 PropertyIsEnumerable() 是 ECMAScript 中专门用于说明属性...