Zhentiw - 博客园

2020年10月26日

[CSS] Use CSS Variables Almost like Boolean Values with Calc (maintainable css)

摘要： In this lesson, we explore how you can use CSS variables almost like Boolean values in combination with calc(). By setting a variable to 1 or 0 and th 阅读全文

posted @ 2020-10-26 21:29 Zhentiw 阅读(135) 评论(0) 推荐(0)

[Kotlin] Typecheck with 'is' keyword, 'as' keyword for assert type

摘要： val randomNumber = Random().nextInt(3) if (randomNumber is BigDecimal) { result = result.add(BigDecimal(36)) } If you use type check, then 'result' is 阅读全文

posted @ 2020-10-26 18:36 Zhentiw 阅读(69) 评论(0) 推荐(0)

[Kotlin] When to add () and when not to

摘要： Let's see following code: println(colors.reduce { acc, curr -> "$acc, $curr" }) // red, blue, green, black val myMap = mapOf(1 to "one", 2 to "two", 3 阅读全文

posted @ 2020-10-26 16:22 Zhentiw 阅读(115) 评论(0) 推荐(0)

[Kotlin] fold / reduce

摘要： In kotlin, "fold" is same in Javascript's reduce. "fold" has initial value "reduce" in kotlin, you don't give initial value val colors = listOf("red", 阅读全文

posted @ 2020-10-26 16:14 Zhentiw 阅读(211) 评论(0) 推荐(0)

2020年10月25日

[Functional Programming] Use the Callback and Closure Pattern to Build Advanced Async Behaviors [Full code]

摘要： import { curry, compose, toUpper, pipe } from 'ramda'; // #region listeners const _log = (value) => console.log(value); // #endregion // #region broad 阅读全文

posted @ 2020-10-25 22:11 Zhentiw 阅读(142) 评论(0) 推荐(0)

[Javascript] Broadcaster + Operator + Listener pattern -- 11. Customize the done logic

摘要： Buffers give you chance to gather values together until your ready to work with them. This pattern can be used for calculations, string manipulations, 阅读全文

posted @ 2020-10-25 22:10 Zhentiw 阅读(107) 评论(0) 推荐(0)

[Javascript] Broadcaster + Operator + Listener pattern -- 10. Define a Function to Set Common Behaviors in Operators

摘要： In our previous code, we have seen this partten for operators: // #region operators const concat = curry((broadcaster, listener) => { let string = ''; 阅读全文

posted @ 2020-10-25 21:54 Zhentiw 阅读(164) 评论(0) 推荐(0)

[Functional Programming] Start With the API You Want Then Implement

摘要： If you can think ahead to how you want your code to look into the future, then you can tackle your problems from the inside out. You design how you wa 阅读全文

posted @ 2020-10-25 21:18 Zhentiw 阅读(96) 评论(0) 推荐(0)

[Javascript] Broadcaster + Operator + Listener pattern -- 9. Create modify, filter, map operators

摘要： import { curry } from 'ramda'; // #region listeners const _log = (value) => console.log(value); // #endregion // #region broadcasters const done = Sym 阅读全文

posted @ 2020-10-25 17:45 Zhentiw 阅读(128) 评论(0) 推荐(0)

2020年10月24日

[Javascript] Broadcaster + Operator + Listener pattern -- 8. Pass a Done Symbol when an Async Function is Done

摘要： All good things come to an end. The concept of "done" plays a large part in our pattern and asynchronous code in general. We have to be able to handle 阅读全文

posted @ 2020-10-24 19:39 Zhentiw 阅读(120) 评论(0) 推荐(0)

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