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rxjs 怎么做到不管何时获取数据都能获取到最后一次的数据

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rxjs 怎么做到不管何时获取数据都能获取到最后一次的数据

使用场景是这样的：
我有N个模块都要获取用户信息，当第一个模块去调用时就去调用后台接口，后面的不过就直接用这个数据
这N个模块不分先后，有的模块可能调用时获取用户信息已经调用完成，即直接获取最后一次发布的数据即可

求帮助，谢谢


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与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
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