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Maximum number of records in a MySQL database table
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mysql int types can do quite a few rows: http://dev.mysql.com/doc/refman/5.0/en/numeric-types.html
unsigned int largest value is 4,294,967,295
unsigned bigint largest value is 18,446,744,073,709,551,615
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animating addClass/removeClass with jQuery
...s to provide the animation and jQuery to change the classes. Live example: http://jsfiddle.net/tw16/JfK6N/
#someDiv{
-webkit-transition: all 0.5s ease;
-moz-transition: all 0.5s ease;
-o-transition: all 0.5s ease;
transition: all 0.5s ease;
}
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Delete first character of a string in Javascript
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Use .charAt() and .slice().
Example: http://jsfiddle.net/kCpNQ/
var myString = "0String";
if( myString.charAt( 0 ) === '0' )
myString = myString.slice( 1 );
If there could be several 0 characters at the beginning, you can change the if() to a while().
E...
Do I need Content-Type: application/octet-stream for file download?
The HTTP standard says:
1 Answer
1
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What is the official “preferred” way to install pip and virtualenv systemwide?
...install the latest Python (2.7.9 and up) Pip is now bundled with it.
See: https://docs.python.org/2.7//installing/index.html
If not :
Update (from the release notes):
Beginning with v1.5.1, pip does not require setuptools prior to running get-pip.py. Additionally, if setuptools (or distribute) ...
Border length smaller than div width?
...ers) is with a negative spread box-shadow. Check out this updated fiddle: http://jsfiddle.net/WuZat/290/
box-shadow: 0px 24px 3px -24px magenta;
I think the safest and most compatible way is the accepted answer above, though. Just thought I'd share another technique.
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Why does sun.misc.Unsafe exist, and how can it be used in the real world?
... code that contains special instructions for CAS
read more about CAS here http://en.wikipedia.org/wiki/Compare-and-swap
The sun.misc.Unsafe functionality of the host VM can be used to allocate uninitialized objects and then interpret the constructor invocation as any other method call.
One can trac...
WhatsApp API (java/python) [closed]
...cret pilot program which WhatsApp is working on with selected businesses
https://faq.whatsapp.com/general/26000052
News coverage:
https://yourstory.com/2017/09/app-fridays-whatsapp-for-business-bookmyshow/
https://yourstory.com/2017/09/bookmyshows-product-team-decrypts-how-whatsapp-for-busines...
Using the rJava package on Win7 64 bit with R
... work! Mirrors are not up-to-date, so go to the source at www.rforge.net: http://www.rforge.net/rJava/files/. Note the advice there
“Please use
`install.packages('rJava',,'http://www.rforge.net/')`
to install.”
That is almost correct. This actually works:
install.packages('rJava', .libPat...
开源MQTT网关：EMQX vs Mosquitto - 创客硬件开发 - 清泛IT社区，为创新赋能！
...ket 协议。同时 EMQX 5.0 开创性地引入了下一代互联网协议 HTTP/3 的底层传输协议 QUIC 的支持，以解决复杂网络环境下的通信问题，提升整体吞吐量和移动连接的稳定性。此外，EMQX 也扩展支持 MQTT-SN、CoAP、LwM2M、STOMP 以及其他协议...