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How can I find the length of a number?
...
Ok, so many answers, but this is a pure math one, just for the fun or for remembering that Math is Important:
var len = Math.ceil(Math.log(num + 1) / Math.LN10);
This actually gives the "length" of the number even if it's in exponential form. num is supposed to be a non negative integ...
Dealing with nginx 400 “The plain HTTP request was sent to HTTPS port” error
...p behind passenger/nginx. I'm trying to get it to respond to both http and https calls. The problem is, when both are defined in the server block https calls are responded to normally but http yields a 400 "The plain HTTP request was sent to HTTPS port" error. This is for a static page so I'm guessi...
Convert string to integer type in Go?
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How to initialize a struct in accordance with C programming language standards
...citly initialized the same as objects that have static storage duration." (https://gcc.gnu.org/onlinedocs/gcc/Designated-Inits.html)
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Spring mvc @PathVariable
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suppose you want to write a url to fetch some order, you can say
www.mydomain.com/order/123
where 123 is orderId.
So now the url you will use in spring mvc controller would look like
/order/{orderId}
Now order id can be declared a path variable
@RequestMapping(value = " /order/{orde...
搭建高可用mongodb集群（一）——配置mongodb - 大数据 & AI - 清泛网 - 专...
...接着弄。
参考：
NoSQL开篇——为什么要使用NoSQL http://www.infoq.com/cn/news/2011/01/nosql-why/
mongodb手册 http://cn.docs.mongodb.org/manual/single/
原创文章，转载请注明： 转载自LANCEYAN.COM
mongodb集群
Is there a method that works like start fragment for result?
...ey" to result))
}
The snippet is taken from Google's official documents.
https://developer.android.com/training/basics/fragments/pass-data-between#kotlin
At the data of this answer written, this feature is still in alpha state. You can try it out using this dependency.
androidx.fragment:fragmen...
python-pandas and databases like mysql
...()
And here is the equivalent example for MySQLdb:
import MySQLdb
mysql_cn= MySQLdb.connect(host='myhost',
port=3306,user='myusername', passwd='mypassword',
db='information_schema')
df_mysql = pd.read_sql('select * from VIEWS;', con=mysql_cn)
print 'loaded da...
What are some uses of decltype(auto)?
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How to make a copy of a file in android?
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Kotlin extension for it
fun File.copyTo(file: File) {
inputStream().use { input ->
file.outputStream().use { output ->
input.copyTo(output)
}
}
}
...