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What is the difference between up-casting and down-casting with respect to class variable
...og.
Police Dog - Police Dog extends Pet Dog.
public class Dog{
public String getType () {
System.out.println("NormalDog");
return "NormalDog";
}
}
/**
* Pet Dog has an extra method dogName()
*/
public class PetDog extends Dog{
public String getType () {
System.ou...
What is the difference between “px”, “dip”, “dp” and “sp”?
...tual screen sizes into four
generalized sizes: small, normal, large, and extra-large.
Screen density
The number of pixels within a physical area of the
screen; usually referred to as dpi (dots per inch). For example, a
"low" density screen has fewer pixels within a given physical area,...
How can I process each letter of text using Javascript?
I would like to alert each individual letter of a string, but I am unsure how to do this.
23 Answers
...
Replace console output in Python
...
An easy solution is just writing "\r" before the string and not adding a newline; if the string never gets shorter this is sufficient...
sys.stdout.write("\rDoing thing %i" % i)
sys.stdout.flush()
Slightly more sophisticated is a progress bar... this is something I am us...
语音识别 报错问题：No Activity found to handle intent { act=android.sp...
语音识别仿真报错，安装到手机端也报错https://www.fun123.cn/reference/info/#AppEntry
请参考一下这个教程，你上面报错的原因是手机上没有安装语音识别引擎，这里推荐“讯飞语音+”，下载地址：https://www.pgyer.com/yyyq
How do you reverse a string in place in JavaScript?
How do you reverse a string in place (or in-place) in JavaScript when it is passed to a function with a return statement, without using built-in functions ( .reverse() , .charAt() etc.)?
...
Find and replace - Add carriage return OR Newline
In the case of following string to be parsed.
5 Answers
5
...
How to install latest version of git on CentOS 7.x/6.x
...the flowing command:
yum --disablerepo=base,updates --enablerepo=rpmforge-extras install git
If you already have git installed then use:
yum --disablerepo=base,updates --enablerepo=rpmforge-extras update git
Related question(s):
Facing issues while upgrading git to latest version on CentOS 6...
Postgresql - change the size of a varchar column to lower length
... other databases, is smart enough to only use just enough space to fit the string (even using compression for longer strings), so even if your column is declared as VARCHAR(255) - if you store 40-character strings in the column, the space usage will be 40 bytes + 1 byte of overhead.
The storage ...
How do I restrict a float value to only two places after the decimal point in C?
... just want to round the number for output purposes, then the "%.2f" format string is indeed the correct answer. However, if you actually want to round the floating point value for further computation, something like the following works:
#include <math.h>
float val = 37.777779;
float rounde...