在knockoutJS 中克隆/复制observablearray 的最佳方法是什么? [英] What is the best way of cloning/copying an observablearray in knockoutJS?

问题描述

问题说明了一切.我想在 KnockoutJS 中将一个 observable 数组复制到另一个.

Question says it all really. I want to copy an observable array to another in KnockoutJS.

推荐答案

要克隆一个 observableArray，您可能需要这样做:

To clone an observableArray you would want to do:

var viewModel = {
    array1: ko.observableArray(["one", "two"]),
    array2: ko.observableArray()
};

viewModel.clone = function() {
   viewModel.array1(viewModel.array2.slice(0));
};

如果你只想做一个副本，那么你会这样做:

If you want to just do a copy, then you would do:

viewModel.array1(viewModel.array2());

第二个示例的问题在于底层数组是相同的，因此推送到 array1 或 array2 会导致两者都具有新值(因为它们都指向同一个数组).

The problem with the second example is that the underlying array is the same, so pushing to array1 or array2 would result in both having the new value (as they both point to the same array).

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