ChuckLu - 博客园

2020年12月29日

In javascript, is an empty string always false as a boolean?

摘要： In javascript, is an empty string always false as a boolean? in javascript, var a = ''; var b = (a) ? true : false; var b will be set to false. is thi 阅读全文

posted @ 2020-12-29 10:11 ChuckLu 阅读(123) 评论(0) 推荐(0)

Why a is undefined while b is 3 in var a=b=3?

摘要： Why a is undefined while b is 3 in var a=b=3? In the following code, I expected both a and b to be 3. However, a is undefined and b is 3. Why? (functi 阅读全文

posted @ 2020-12-29 10:07 ChuckLu 阅读(134) 评论(0) 推荐(0)

2020年12月28日

Dynamically access object property using variable

摘要： Dynamically access object property using variable I'm trying to access a property of an object using a dynamic name. Is this possible? const something 阅读全文

posted @ 2020-12-28 18:17 ChuckLu 阅读(104) 评论(0) 推荐(0)

What is the difference between readonly=“true” & readonly=“readonly”?

摘要： What is the difference between readonly=“true” & readonly=“readonly”? What is the difference between: <input name="TextBox1" type="text" id="TextBox1" 阅读全文

posted @ 2020-12-28 18:11 ChuckLu 阅读(124) 评论(0) 推荐(0)

X Wing 数独Sudoku

摘要： https://www.learn-sudoku.com/x-wing.html X Wing An X Wing is a technique for removing candidates (pencil marks). It starts with either two parallel ro 阅读全文

posted @ 2020-12-28 13:17 ChuckLu 阅读(1448) 评论(0) 推荐(0)

Vue.js—Difference between v-model and v-bind

摘要： Vue.js—Difference between v-model and v-bind I'm learning Vue with an online course and the instructor gave me an exercise to make an input text with 阅读全文

posted @ 2020-12-28 10:00 ChuckLu 阅读(229) 评论(0) 推荐(0)

How to add dynamically attribute in VueJs

摘要： How to add dynamically attribute in VueJs base one condition we can define or change attributes in vue Please refer official document for the same htt 阅读全文

posted @ 2020-12-28 09:55 ChuckLu 阅读(102) 评论(0) 推荐(0)

2020年12月24日

how many types in javascript

摘要： JavaScript data types and data structures Programming languages all have built-in data structures, but these often differ from one language to another 阅读全文

posted @ 2020-12-24 17:17 ChuckLu 阅读(100) 评论(0) 推荐(0)

Why does JavaScript variable declaration at console results in “undefined” being printed?

摘要： Why does JavaScript variable declaration at console results in “undefined” being printed? I have already read the following SO posts: Why does this Ja 阅读全文

posted @ 2020-12-24 17:02 ChuckLu 阅读(183) 评论(0) 推荐(0)

What’s the difference between “{}” and “[]” while declaring a JavaScript array?

摘要： What’s the difference between “{}” and “[]” while declaring a JavaScript array? What’s the difference between “{}” and “[]” while declaring a JavaScri 阅读全文

posted @ 2020-12-24 16:18 ChuckLu 阅读(120) 评论(0) 推荐(0)

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