我发现这个"没有替换回输出执行",但也许我的英语不太好,我真的不明白这意味着什么.任何人都可以帮忙吗？
在linux或窗口中对iphone模拟器的任何建议？有本地主机或本地网络的浏览能力？
是否可以在命令行中运行java类来在正在运行的swing中运行某个类或函数？
比如,什么时候java Test asd将setText运行一个Jlabel到asd
如何使用Ruby on Rails来做到这一点？
mysql> SET @t1=1, @t2=2, @t3:=4;
mysql> SELECT @t1, @t2, @t3, @t4 := @t1+@t2+@t3;
我正在尝试通过放入gem 'devise' , '1.1.2'gemfile并运行来设置设计sudo bundle install然后我尝试运行rake --trace devise:setup.然后错误出来了,有谁知道我的Rails 3应用程序有什么问题？
(in /home/wizztjh/work/testing123)
rake aborted!
Don't know how to build task 'devise:setup'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1728:in `[]'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2050:in `invoke_task'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `each'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2023:in `top_level'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2001:in `run'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in `run'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31
/var/lib/gems/1.8/bin/rake:19:in `load'
/var/lib/gems/1.8/bin/rake:19
我正在阅读学习Python The Hard Way,我真的好奇他的意思
向后读取.py文件
这是什么char buf[MAXDATASIZE] = { 0 };的{0}手段？
试图将其打印出来,但它什么都没打印出来.
#include <stdio.h>
int main(void)
{
char buf[100] = { 0 };
printf("%s",buf);
return 0;
}
我需要检查String是否"\++?"匹配类似的东西+6014456
但我收到此错误消息invalid escape sequence (valid ones are \b \t \n \f \r \" \' \\)....为什么？
第一个传感器是我的lm335z输出.
int firstSensor = 0;
int secondSensor = 0;
int thirdSensor = 0;
int inByte = 0;
void setup()
{
Serial.begin(9600);
establishContact(); // send a byte to establish contact until receiver responds
}
void loop()
{
if (Serial.available() > 0) {
inByte = Serial.read();
firstSensor = analogRead(0);
delay(10);
secondSensor = analogRead(1);
thirdSensor = analogRead(2);
Serial.print(firstSensor, DEC);
Serial.print(",");
Serial.print(secondSensor, DEC);
Serial.print(",");
Serial.println(thirdSensor, DEC);
}
}
void establishContact() {
}