circular-reference

问题 I have a tree structure that looks something like this: interface TreeData { id : number; text : string; children : TreeData[]; } I want to wrap this up into an Immutable Map but since I'm using TypeScript, I would like some type safety around using get and set. I found 2 articles online for suggestions on how one might be able to do this, see: https://github.com/facebook/immutable-js/issues/683 https://blog.mayflower.de/6630-typescript-redux-immutablejs.html However my problem is that my

问题 Example sheet: https://docs.google.com/spreadsheets/d/14ma-y3esh1S_EkzHpFBvLb0GzDZZiDsSVXFktH3Rr_E/edit?usp=sharing In column B of ItemData sheet, I have achieved the result I want by copying the formula into every cell in the column, but I want to solve this using ArrayFormula instead. In column C I have achieved the same result using ArrayFormula. However, for addition, column C is referring to cells in column B, while column B is referring to cells in column B. I.e. every cell in column B

问题 I have a complex navigation structure, I go from one nav graph then based on some logic, decide which nav graph to go to there. However both the nav graphs share 3 other nav graphs. See image below Currently I get a circular reference error if I try to include each nav graph in the A & B. I have also tried creating a global action, which leads to illegal argument exception since it doesn't exist on the nav graph. Please help!!! 来源： https://stackoverflow.com/questions/61083805/circular

问题 I have a Model that will "carry" (Model.validator) a validator instance with it, and I need the Validator to have access to the Model's attributes. So, what I have come up with is the following var Validator = function(model) { this.model = model; }; var Model = function() { this._attributes = {}; this.validator = new Validator(this); }; var model = new Model(); This code creates a circular reference between those 2 objects. Is this a bad practice that will cause memory leaks? Any other ideas

问题 I have a Model that will "carry" (Model.validator) a validator instance with it, and I need the Validator to have access to the Model's attributes. So, what I have come up with is the following var Validator = function(model) { this.model = model; }; var Model = function() { this._attributes = {}; this.validator = new Validator(this); }; var model = new Model(); This code creates a circular reference between those 2 objects. Is this a bad practice that will cause memory leaks? Any other ideas

来源： https://stackoverflow.com/questions/38847494/a-circular-reference-has-been-detected-in-symfony

来源： https://stackoverflow.com/questions/63838647/resolving-smart-pointer-circular-references-without-using-weak-pointers

来源： https://stackoverflow.com/questions/63838647/resolving-smart-pointer-circular-references-without-using-weak-pointers

问题 I have a triangular mesh structure in Delphi 10. For performance reasons I store the data of the mesh's vertices, triangle faces, etc. in descendants of TList. I let the TLists do the calculations for every member of the list. For these calculations I need access to some fields of the TMesh structure. Therefore during the creation of TMesh and subsequently the creation of the lists I assign the parent TMesh to the lists. I use a forward declaration of TMesh to do so. Please see the following

问题 I have a triangular mesh structure in Delphi 10. For performance reasons I store the data of the mesh's vertices, triangle faces, etc. in descendants of TList. I let the TLists do the calculations for every member of the list. For these calculations I need access to some fields of the TMesh structure. Therefore during the creation of TMesh and subsequently the creation of the lists I assign the parent TMesh to the lists. I use a forward declaration of TMesh to do so. Please see the following