对于选项的答案为是/否的选项, 大家是会用一个checkbox还是两个radio框? 哪个会更合理? 为什么?
最近看到一篇文章是关于这个问题的,发现挺有意思的.为此做个总结记录.有人在Twitter上发布该问题的讨论,摘选了些比较有用的观点. 相信在看过这些别人的观点后, 你会更清楚在什么情况下使用哪种类会更加合适.以下为一些用户的评论观点:
先假设有个待展开数组:
$arr = [
'a' => [
'a1' => 'nice100.net',
'a2' => 'good',
],
'b' => [
'b1' => [
'b11' => 'nice',
'b12' => 'like',
]
]
];平铺展开的深度为2:
//方法一
$result = call_user_func_array('array_merge', $arr);
//方法二(会更快)
$result = array_merge(...array_values($arr));
//结果输出
Array
(
[a1] => nice100.net
[a2] => good
[b1] => Array
(
[b11] => nice
[b12] => like
)
)
全部平铺展开
//如果要全部平铺展开,那么对于多维数组, array_merge函数就不能满足了,需要办理递归
$re = [];
array_walk_recursive($arr, function ($v, $k) use (&$re) {
$re[$k] = $v;
}, $re);
//输入结果,注意如果存在相同的key,那么后者会覆盖前者
Array
(
[a1] => nice100.net
[a2] => good
[b11] => nice
[b12] => like
)首先说下博主出现这个报错的情形:自己使用是谷歌浏览器,访问谷歌网址, 浏览器使用了科学上网插件. 如果和我的情形一样,那么博主的办法可参考下.
经过排查发现是dns污染的问题.以下为排查教程;
最后但同样重要,重启下浏览器
这里说下遇到的一个坑, 在开始遇到报错时, 我也绝得是dns的,所以一开始就dns调整为合适了,然后直接再重试访问,当然还是访问失败, 就以为不是dns的问题,即使我也想到清理了下网页缓存, 但还是同样的报错, 最后试了一大圈,才发现浏览器重启了,就能正常访问, 所以建议浏览器最好重启下再重新访问试下. 就因为没重启才导致这个小问题没能快速解决.
For the first time since the start of the TIOBE index nearly 20 years ago, Java and C don't make up the top 2 positions any more. C is still number one, but it is Python that claims the second position now. Some say that Python's recent surge in popularity is due to booming fields such as data mining, AI and numerical computing. But I have my own take on this. I believe that Python's popularity has to do with general demand. In the past, most programming activities were perfomed by software engineers. But programming skills are needed everywhere nowadays and there is a lack of good software developers. As a consequence, we need something simple that can be handled by non-software engineers, something easy to learn with fast edit cycles and smooth deployment. Python meets all these needs.
Some time ago I had a flat tyre and called the road patrol to help me out. The mechanic asked about my living and when I used the word "software" in my answer, he smiled and started talking very enthousiastically about his own passion: programming in Python. From that moment on, I knew Python would become ubiquitous - Paul Jansen CEO TIOBE Software
| 排名 | 编程语言 | Ratings | 同比上月 |
|---|---|---|---|
| 1 | C | 16.21% | + 0.17% |
| 2 | Python | 12.12% | +2.27% |
| 3 | Java | 11.68% | -4.57% |
| 4 | C++ | 7.60% | +1.99% |
| 5 | C# | 4.67% | +0.36% |
| 6 | Visual Basic | 4.01% | -0.22% |
| 7 | JavaScript | 2.03% | +0.10% |
| 8 | PHP | 1.79% | +0.07% |
| 9 | R | 1.64% | +0.66% |
| 10 | SQL | 1.54% | -0.15% |
| 11 | Groovy | 1.51% | +0.41% |
| 12 | Perl | 1.51% | +0.68% |
| 13 | Go | 1.36% | +0.51% |
| 14 | Swift | 1.35% | -0.31% |
| 15 | Ruby | 1.22% | -0.04% |
| 16 | Assembly language | 1.17% | +0.14% |
| 17 | MATLAB | 1.10% | +0.21% |
| 18 | Delphi/Object Pascal | 0.86% | -0.28% |
| 19 | Objective-C | 0.84% | -0.35% |
| 20 | Transact-SQL | 0.82% | +0.44% |
| 21 | Classic Visual Basic | 0.73% | -- |
| 22 | Logo | 0.72% | -- |
| 23 | Scratch | 0.63% | -- |
| 24 | PL/SQL | 0.62% | -- |
| 25 | Rust | 0.58% | -- |
| 26 | SAS | 0.58% | -- |
| 27 | Dart | 0.54% | -- |
| 28 | COBOL | 0.53% | -- |
| 29 | Scala | 0.53% | -- |
| 30 | Julia | 0.50% | -- |
| 31 | PowerShell | 0.48% | -- |
| 32 | D | 0.46% | -- |
| 33 | ABAP | 0.43% | -- |
| 34 | Fortran | 0.41% | -- |
| 35 | Lisp | 0.40% | -- |
| 36 | Kotlin | 0.38% | -- |
| 37 | Lua | 0.37% | -- |
| 38 | Ada | 0.37% | -- |
| 39 | VHDL | 0.35% | -- |
| 40 | Prolog | 0.35% | -- |
| 41 | Haskell | 0.34% | -- |
| 42 | Apex | 0.34% | -- |
| 43 | TypeScript | 0.32% | -- |
| 44 | Bash | 0.31% | -- |
| 45 | Tcl | 0.29% | -- |
| 46 | ML | 0.28% | -- |
| 47 | Alice | 0.27% | -- |
| 48 | Scheme | 0.26% | -- |
| 49 | (Visual) FoxPro | 0.25% | -- |
| 50 | Awk | 0.22% | -- |
(因差距很小,故以下按字母顺序列出)
ABC, ActionScript, Applescript, Arc, AutoLISP, bc, Bourne shell, C shell, Clojure, CoffeeScript, Common Lisp, Crystal, cT, Dylan, Elixir, Elm, Emacs Lisp, Erlang, F#, Forth, Hack, Icon, Inform, Io, J, Korn shell, LabVIEW, Ladder Logic, Lingo, LiveCode, Maple, Mercury, MQL4, NATURAL, OpenCL, OpenEdge ABL, PL/I, PostScript, Q, REXX, Ring, RPG, Simulink, Small Basic, Solidity, SPARK, Stata, Vala/Genie, VBScript, Verilog
以上数据来自权威网站TIOBE Index复制以下代码到console控制中, 并回车执行, 然后只有使用 console.save(变量名) 命令轻松的将控制台中的变量下载到本地来.
(function(console){
console.save = function(data, filename){
if(!data) {
console.error('Console.save: No data')
return;
}
if(!filename) filename = 'console.json'
if(typeof data === "object"){
data = JSON.stringify(data, undefined, 4)
}
var blob = new Blob([data], {type: 'text/json'}),
e = document.createEvent('MouseEvents'),
a = document.createElement('a')
a.download = filename
a.href = window.URL.createObjectURL(blob)
a.dataset.downloadurl = ['text/json', a.download, a.href].join(':')
e.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null)
a.dispatchEvent(e)
}
})(console)其实在console控制台,也可以使用copy(变量名)来复制变量到剪切板上.copy命令也很方便
注意:
有些情况下使用copy命令复制数组变量总是得到空数组, 那么建议使用对象类型, 使用对象类型一定是复制出来的.