rails polymorphism problem: I now have questions , articles , comments three models, one question corresponds to multiple comments , and a article corresponds to multiple comments . Now how to submit comments under question ? my model...
suppose that ABCD class, BC virtual inheritance from AMagle D inherited from BC,A class virtual function (not overridden at the same time in BC) and member variables belong to the internal of the class, if both of them solve the ambiguity, it can be solv...
isn t the js code automatically executed by loading the js file directly? Why does webpack need to wrap the js code in a jsonp way? Is designed to avoid namespace conflicts? ...
rules: [{required: true, message: cannot be empty , trigger: blur }, {min: 6, message: at least 6 digits , trigger: blur }, {type: number , message: Please enter numbers , trigger: blur }] < el-input vMutel model.number = "model " ...
I have accumulated a lot of PPT templates in recent years. I want to make thumbnails like those PPT template websites . I have searched the Internet for a long time and tried many keywords: . PPT generates thumbnails in batches PPT to Picture bat...
I would like to ask you how to use the button customized outside the canvas to trigger events in the toolbox in the echarts for example: I want to click the box button to achieve the same effect as the horizontal selection button in the toolbox. in o...
vue-cli 3.0 packages how to add version numbers to js and css, and how to change the names of js and css. ...