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What is the difference between “px”, “dip”, “dp” and “sp”?
...x
Pixels - corresponds to actual pixels on the screen.
in
Inches - based on the physical size of the screen.
1 Inch = 2.54 centimeters
mm
Millimeters - based on the physical size of the screen.
pt
Points - 1/72 of an inch based on the physical size of the screen.
dp or dip
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REST API Token-based Authentication
...e approach each problem in isolation:
Authentication
For authentication, baseauth has the advantage that it is a mature solution on the protocol level. This means a lot of "might crop up later" problems are already solved for you. For example, with BaseAuth, user agents know the password is a pass...
How do I sort one vector based on values of another
I have a vector x, that I would like to sort based on the order of values in vector y. The two vectors are not of the same length.
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Disable Rails SQL logging in console
...
To turn it off:
old_logger = ActiveRecord::Base.logger
ActiveRecord::Base.logger = nil
To turn it back on:
ActiveRecord::Base.logger = old_logger
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How to convert a Binary String to a base 10 integer in Java
...ers (without leading zeroes) that I want to convert to their corresponding base 10 numbers. Consider:
9 Answers
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JavaScript: how to change form action attribute value based on selection?
I'm trying to change the form action based on the selected value from a dropdown menu.
5 Answers
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How can I hash a password in Java?
I need to hash passwords for storage in a database. How can I do this in Java?
13 Answers
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Meaning of ffmpeg output (tbc, tbn, tbr) [closed]
...ll about time. FFMpeg uses in fact three different timestamps in different bases in order to work.
tbn = the time base in AVStream that has come from the container
tbc = the time base in AVCodecContext for the codec used for a particular stream
tbr = tbr is guessed from the video stream and is th...
/usr/include/c++/4.9/bits/stl_iterator_base_types.h:165:53: error: ‘i...
/usr/include/c++/4.9/bits/stl_iterator_base_types.h:165:53: error: ‘int’ is not a class, struct, or union type先看下面的代码(来自:SO)：#include <iostream>#include <cmath>#include <vector>using namespace std;double distance(int a, in...先看下面的代码(来自: SO)：
#include <i...
App Inventor 2 实现上传文件到服务器全方案总结 · App Inventor 2 中文网
...ventor 2 实现上传文件到服务器全方案总结
1、图片Base64化
2、通用（二级制）文件上传：通过Web客户端POST文件
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App Inventor 2 实现上传文件到服务器全方案总结
1、图片Base64化
图片Base64化，然后通过...