有没有办法查看同一文件的版本staged
和unstaged
版本之间的差异?
例如:
Changes to be committed:
modified: conf/application.conf
Changes not staged for commit:
(use "git add/rm <file>..." to update what will be committed)
(use "git checkout -- <file>..." to discard changes in working directory)
modified: conf/application.conf
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当我进行更改然后再次修改文件而不进行暂存时会发生这种情况.
EDIT
该git status -vv
命令还不够好,因为我需要使用diff
/ difftool
命令.这是因为在实践中,太多文件中的更改太多,滚动浏览所有文件并不高效.但diff
/ difftool
允许我指定我感兴趣的文件.
为Text/Combo变量启用这样的装饰器的基本方法(没有自定义API)是什么?
有没有人成功为S3事件实现了基于Java的请求处理程序?
我的课:
package example;
import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestHandler;
import com.amazonaws.services.s3.model.S3Event;
public class Hello implements RequestHandler<S3Event, String> {
public String handleRequest(S3Event event, Context context) {
return "Success";
}
}
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错误信息:
JSON解析期间发生错误:java.lang.RuntimeException java.lang.RuntimeException:JSON解析期间发生错误引起:java.io.UncheckedIOException:com.fasterxml.jackson.databind.JsonMappingException:无法反序列化com的实例. amazonaws.services.s3.model.S3Event在[来源:lambdainternal.util.NativeMemoryAsInputStream@6108b2d7;来自:START_OBJECT标记; line:1,column:1]引起:com.fasterxml.jackson.databind.JsonMappingException:无法在[Source:lambdainternal.util.NativeMemoryAsInputStream]的START_OBJECT标记中反序列化com.amazonaws.services.s3.model.S3Event的实例@ 6108b2d7; com:fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:148)中的com.fasterxml.jackson.databind.DeserializationContext.mappingException(DeserializationContext.java:835)位于com.fasterxml的第1行,第1列:第1列.jackson.databind.DeserializationContext.mappingException(DeserializationContext.java:831)at com.fasterxml.jackson.databind.deser.std.EnumDeserializer._deserializeOther(EnumDeserializer.java:137)at com.fasterxml.jackson.databind.deser.std .inumDeserializer.deserialize(EnumDeserializer.java:89)at com.fasterxml.jackson.databind.deser.std.EnumDeserializer.deserialize(EnumDeserializer.java:18)at com.fasterxml.jackson.databind.ObjectReader._bindAndClose(ObjectReader.java) :1441)at com.fasterxml.jackson.databind.ObjectReader.readValue(ObjectReader.java:1047)
我在tutorialspoint.com上用c ++学习多线程,在那里我遇到了这段代码:
#include<iostream>
#include<cstdlib>
#include<pthread.h>
using namespace std;
#define NUM_THREADS 5
void *PrintHello(void *threadnum)
{
long int *tnum;
tnum=(long*)threadnum;
cout<<"Hello World! Thread num:"<<tnum<<endl;
pthread_exit(NULL);
}
int main()
{
pthread_t threads[NUM_THREADS];
int rc;
long int i;
for(i=0;i<NUM_THREADS;i++)
{
cout<<"main(): creating thread,"<<i<<endl;
rc=pthread_create(&threads[i],NULL,PrintHello,(void*)i);
cout<<"Thread ID:"<<threads[i]<<endl;
cout<<"-----------------------------------------------"<<endl;
if(rc)
{
cout<<"Error:Unable to create thread,"<<rc<<endl;
exit(-1);
}
}
pthread_exit(NULL);
}
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当我编译这段代码时,我的输出为:
main(): creating thread,0
Thread ID:124028821706496
-----------------------------------------------
main(): creating thread,1
Thread ID:124028812797696
-----------------------------------------------
main(): creating thread,2
Hello World! Thread num:0
Thread ID:124028803434240
-----------------------------------------------
main(): creating …
Run Code Online (Sandbox Code Playgroud) 安装django-norel并运行后python manage.py shell
,我收到此错误:
>>> from django.utils import timezone
Traceback (most recent call last):
File "<console>", line 1, in <module>
ImportError: cannot import name timezone
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使用Ubuntu 12.04 LTS,python 2.7.3,django 1.4,以及django-nonrel,djangotoolbox和django-mongodb引擎的最新版本
这似乎是某种不兼容问题.我应该使用早期版本的django吗?如果是这样,我如何在install命令中指定django版本?
在C++文件中,我有一个类型的对象QList<QStringList>*
,它应该是一个二维String数组.
目前,在C++中我能够做到这一点:
// this will display the QString value in the Console,
// where entries is of type QList<QStringList>*
qDebug() << "test: " << entries->at(0).at(0);
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我知道如何将此对象公开给QML,但我如何能够在QML中导航/访问其功能?
在main.qml
,我可以调用返回此对象的函数:
_app.getCalendar()
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但是我如何导航它,就像上面的C++代码一样?
编辑:我实际需要做的是从C++发送二维字符串数组到QML.我是以一种过于复杂的方式做到这一点的吗?有没有其他方法来实现这一目标?