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Lets see how to query Firebase. First thing, when we do query, 'index' will always help, for both SQL and NoSQL. In Firebase, we can also set index on 阅读全文
posted @ 2016-10-12 03:05
Zhentiw
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Getter on Object: 1. prop: 2. props: Setter ob Object: Another way to use Lens: 阅读全文
posted @ 2016-10-10 21:12
Zhentiw
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Index router as default router. Index router, usually comes as last, just right before the fallback router. 阅读全文
posted @ 2016-10-10 16:27
Zhentiw
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It’s easy to pass the wrong value to a function. Typescript interfaces are great because they catch errors at compile time or in an IDE. In this lesso 阅读全文
posted @ 2016-10-10 01:52
Zhentiw
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A BehaviorSubject can remember the latest value emitted, but what if we wanted Observer B to see all the previous values emitted in the past? We can't 阅读全文
posted @ 2016-10-10 01:09
Zhentiw
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Sometimes you need to filter an array of objects or perform other conditional logic based on a combination of factors. Ramda's where function gives yo 阅读全文
posted @ 2016-10-10 00:53
Zhentiw
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Pluck: Get one prop from the object array: Props: 阅读全文
posted @ 2016-10-10 00:48
Zhentiw
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Take a function as arguement, and the function only return true of false. If the function 'f' return ture, when complement(f) will return false. var i 阅读全文
posted @ 2016-10-10 00:44
Zhentiw
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In JavaScript, many libraries use string arguments to change behavior. In this lesson we learn how Typescript catches string related errors at compile 阅读全文
posted @ 2016-10-09 03:29
Zhentiw
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Now is a great way to deploy your node application, but the generated URLs aren't memorable or easily remembered. With Now's alias command, you can fi 阅读全文
posted @ 2016-10-08 16:43
Zhentiw
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