ChuckLu - 博客园

2020年12月30日

摘要： Five equal columns in twitter bootstrap https://stackoverflow.com/a/22799354/13338936 For Bootstrap 3 and above For Bootstrap 4 Bootstrap 4 now uses f 阅读全文

posted @ 2020-12-30 11:27 ChuckLu 阅读(97) 评论(0) 推荐(0)

Why not always use the index as the key in a vue.js for loop?

摘要： Why not always use the index as the key in a vue.js for loop? I have used vue.js for a couple of projects and I have been using the index as the key i 阅读全文

posted @ 2020-12-30 10:34 ChuckLu 阅读(100) 评论(0) 推荐(0)

2020年12月29日

Elements in iteration expect to have 'v-bind:key' directives

摘要： https://github.com/vuejs/vetur/issues/858 vuejs v-for add bootstrap row every 5 items <script src="https://vuejs.org/js/vue.min.js"></script> <div id= 阅读全文

posted @ 2020-12-29 16:27 ChuckLu 阅读(159) 评论(0) 推荐(0)

What does a character class with only a lone caret do?

摘要： What does a character class with only a lone caret do? [^][…] is not two character classes but just one character class containing any other character 阅读全文

posted @ 2020-12-29 14:21 ChuckLu 阅读(124) 评论(0) 推荐(0)

What is the point of void operator in JavaScript?

摘要： What is the point of void operator in JavaScript? I've seen some people using void operator in their code. I have also seen this in href attributes: j 阅读全文

posted @ 2020-12-29 10:28 ChuckLu 阅读(78) 评论(0) 推荐(0)

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(104) 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(123) 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(84) 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(103) 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(1386) 评论(0) 推荐(0)

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