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Typedef function pointer?
... {
return u*v;
}
t_somefunc afunc = &product;
...
int x2 = (*afunc)(123, 456); // call product() to calculate 123*456
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follow
...
Javascript seconds to minutes and seconds
... var secs = ~~duration % 60;
// Output like "1:01" or "4:03:59" or "123:03:59"
var ret = "";
if (hrs > 0) {
ret += "" + hrs + ":" + (mins < 10 ? "0" : "");
}
ret += "" + mins + ":" + (secs < 10 ? "0" : "");
ret += "" + secs;
return ret;
}
~~ is a sh...
二维码的生成细节及原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的编码。
（全文完）
文章转自： 酷 壳 – CoolShell.cn
二维码 细节 原理
MySQL pagination without double-querying?
...
This post from the MySQL performance blog explains this further:
http://www.mysqlperformanceblog.com/2007/08/28/to-sql_calc_found_rows-or-not-to-sql_calc_found_rows/
For more information on optimising pagination, check this post and this post.
...
Tracking the script execution time in PHP
... "This page was created in ".$totaltime." seconds";
;?>
From (http://www.developerfusion.com/code/2058/determine-execution-time-in-php/)
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【App Inventor 2 数据可视化】使用柱状图和饼图收集数据 - App应用开发 - ...
...器查看），凑合着看吧~
文章转载自：https://mc.dfrobot.com.cn/thread-316532-1-1.html
文章aia源码如下：
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资源地址：https://drive.google.com/drive/f ... 0BGKOaa?usp=sharing（如打不开可以直接在附件中下载）
数据在行动1：使用柱...
Get nested JSON object with GSON using retrofit
...s":"OK",
"reason":"some reason",
"content" :
{
"foo": 123,
"bar": "some value"
}
}
You'd then have a Content POJO:
class Content
{
public int foo;
public String bar;
}
Then you write a deserializer:
class MyDeserializer implements JsonDeserializer<Co...
When to use ref and when it is not necessary in C#
...mean it's good. It would have been better if rather than if (int.TryParse("123", out var theInt) { /* use theInt */ } we had var candidate = int.TrialParse("123"); if (candidate.Parsed) { /* do something with candidate.Value */ } It is more code, but is much more consistent with the C# language desi...
Hide options in a select list using jQuery
...Nov 17 '10 at 13:17
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How to linebreak an svg text within javascript?
...foreignObject to embed html</h1>
<svg
xmlns="http://www.w3.org/2000/svg"
viewBox="0 0 300 300"
x="0" y="0" height="300" width="300"
>
<circle
r="142" cx="150" cy="150"
fill="none" stroke="#000000" stroke-width="2"
/>...