tri-state-logic

Why new while returning for overloaded operators for DBBool (TriState) implementation in C#

由 你。 提交于 2020-01-07 08:24:37
问题 If you look for the DBBool implementation in C#, few overloaded operators (logical operators | , & , ! ) new while returning. I believe that is not necessary and a small waste of memory. DBBool is a struct and a copy is made when it's passed into a method so there is no reason for that. // Logical negation operator. Returns True if the operand is False, Null // if the operand is Null, or False if the operand is True. public static DBBool operator !(DBBool x) { return new DBBool(-x.value); } /

How can I get angular.js checkboxes with select/unselect all functionality and indeterminate values?

由 大憨熊 提交于 2019-12-28 09:14:22
问题 I am looking for something exactly like these (tri-state checkboxes with "parents"). But using that solution wouldn't be elegant, as I do not depend on jQuery right now, and I would need to call $scope.$apply to get the model to recognize the automatically (un)checked checkboxed jQuery clicked. Here's a bug for angular.js that requests ng-indeterminate-value implemented. But that still wouldn't give me the synchronization to all the children, which is something I don't think should be a part

What's the best way to implement a single tri-state checkbox within angularjs?

由 て烟熏妆下的殇ゞ 提交于 2019-12-18 15:28:32
问题 Is there a simple way to place a single tri-state checkbox on a web-page and bind it to a boolean model so the latter can take true , false or null values? The closest solution I found so far is http://jsfiddle.net/HB7LU/454/ but it has a flaw when setting up an initial view state (as there is no way to get a model value during first rendering). Any other suggestions deal with multiple child checkboxes and solves the problem by watching on them. 回答1: http://jsfiddle.net/xJhEG/ I made it in a

How can I get angular.js checkboxes with select/unselect all functionality and indeterminate values?

由 假如想象 提交于 2019-11-28 04:42:36
I am looking for something exactly like these (tri-state checkboxes with "parents"). But using that solution wouldn't be elegant, as I do not depend on jQuery right now, and I would need to call $scope.$apply to get the model to recognize the automatically (un)checked checkboxed jQuery clicked. Here's a bug for angular.js that requests ng-indeterminate-value implemented. But that still wouldn't give me the synchronization to all the children, which is something I don't think should be a part of my controller. What I am looking for would be something like this: A "ng-children-model" directive
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