if(data != void(0) && data.unavailableItems != void(0)){ //exists } As Norman pointed out in the comments.. you should checkout what void 0 means if(data != void(0) && data.unavailableItems != void(0)){ //exists } As Norman pointed out in the comments.. you should check...
save(function(err) { if (err) done(err); else done(); }); }); }); }); Alternatively, just use the done() callback directly (which will handle an error argument, if it exists): describe('User', function() { describe('#save()', function() { it('should save without error'...
使用特定于应用程序的 Office JavaScript API生成外接程序时,请务必包含错误处理逻辑,以考虑运行时错误。 由于 API 的异步性质,这样做至关重要。 最佳做法 在我们的代码示例和Script Lab代码片段中,你会注意到,对、PowerPoint.run或Word.run的每个调用Excel.run都附带一个catch语句来捕获任何错误。 建议在使用特定于...
然后将所有代码段都看了遍,筛选了以下一百多段代码片段,并加入了部分自己的理解。 另外,本文工具函数的命名非常值得借鉴。 1. 第一部分:数组 1. `all`:布尔全等判断 代码语言:javascript 复制 constall=(arr,fn=Boolean)=>arr.every(fn);all([4,2,3],x=>x>1);// trueall([1,2,3]);// true 2....
check if an object with a specific key value exists in an array of objects Ask Question Asked 5 years, 11 months ago Modified 5 years, 11 months ago Viewed 8k times 2 I'm trying to check if an array of items contains an object with a specific key value, and if it d...
methodself(): booleancheck if contact is self methodname(): stringget the name from a contact methodalias(): Promise<string>get the alias for a contact methodalias(newAlias: string): Promise<void>set or delete the alias for a contact ...
If a class or component doesn't dispose the DotNetObjectReference, dispose it from the client by calling dispose on the passed DotNetObjectReference:JavaScript Copy window.{JS FUNCTION NAME} = (dotNetHelper) => { dotNetHelper.invokeMethodAsync('{.NET METHOD ID}'); dotNetHelper.dispose(); }...
它是用三点(...)表示,Array是可以扩展的,如果是Object,会按照key-value进行扩展。 代码语言:javascript 代码运行次数:0 复制 Cloud Studio代码运行 conststuendts=['Angel','Ryan'];constpeople=['Sara',...stuendts,'Kelly','Eason'];conslog.log(people);// ["Sara", "Angel", "Ryan", "Kelly", ...
ArrayExpr: an array expression; use ArrayExpr.getElement(i) to obtain the ith element expression, and ArrayExpr.elementIsOmitted(i) to check whether the ith element is omitted. ObjectExpr: an object expression; use ObjectExpr.getProperty(i) to obtain the ith property in the object expression...
methodself(): booleancheck if contact is self methodname(): stringget the name from a contact methodalias(): Promise<string>get the alias for a contact methodalias(newAlias: string): Promise<void>set or delete the alias for a contact ...