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micro:bit 微控制器教程 · App Inventor 2 中文网
...感器数据监控
3. 双向通信
常见问题
Q: 扫描不到 micro:bit 设备？
Q: 连接失败？
Q: 无法接收温度数据？
Q: 控制指令无效？
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PHP Multidimensional Array Searching (Find key by specific value)
...e are other threads about searching multidimensional arrays, but I'm not really understanding enough to apply to my situation. Thanks very much for any help!
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Correct way to pass multiple values for same parameter name in GET request
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FWIW PHP doesn't support reading args like ?id=5&id=3. PHP would only read in one value for id here. If I remember correctly, it would have to look like this for it to work with PHP: ?id[]=5&id[]=3
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泰迪熊为什么叫泰迪 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...是 San Jose 通过路边 Ask.com 巨大的广告牌抛给我的第一个问题。
广告牌上除了这个问题和巨大的 Ask.com 之外什么也没有。我以前也曾经想过类似的招数，如果我是男生，就把博客里无聊的问题印在T恤上，来钓到好奇心重的女生...
What is the “right” way to iterate through an array in Ruby?
PHP, for all its warts, is pretty good on this count. There's no difference between an array and a hash (maybe I'm naive, but this seems obviously right to me), and to iterate through either you just do
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How do I send a cross-domain POST request via JavaScript?
...e.php (using PHP as an example). Note: you only need to set Access-Control-Allow-Origin for NON OPTIONS requests - this example always sets all headers for a smaller code snippet.
In postHere.php setup the following:
switch ($_SERVER['HTTP_ORIGIN']) {
case 'http://from.com': case 'https://fro...
One-liner to recursively list directories in Ruby?
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Dir.glob("**/*/") # for directories
Dir.glob("**/*") # for all files
Instead of Dir.glob(foo) you can also write Dir[foo] (however Dir.glob can also take a block, in which case it will yield each path instead of creating an array).
Ruby Glob Docs
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jQuery AJAX cross domain
Here are two pages, test.php and testserver.php.
14 Answers
14
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Composer: how can I install another dependency without updating old ones?
I have a project with a few dependencies and I'd like to install another one, but I'd like to keep the others the way they are. So I've edited the composer.json , but if I run composer install , I get the following output:
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Inserting multiple rows in mysql
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When loading a table from a text file, use LOAD DATA INFILE. This is usually 20 times faster than using INSERT statements.
Optimizing INSERT Statements
You can find more tips on how to speed up your insert statements on the link above.
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