是否有可能从Dockerfile构建镜像,并使用一个命令运行它? docker build命令用于构建Dockerfile, docker run -it命令用于运行映像。

是否存在这两个命令的组合,以使仅使用一个命令就可以更容易地构建和运行?

当我在调试模式下运行时,应用程序崩溃了,但当我正常运行时,它可以工作。 我认为问题发生在附加调试器时。

Log:

A/art: art/runtime/jdwp/jdwp_event.cc:661] Check failed: Thread::Current() != GetDebugThread() (Thread::Current()=0x7f44a18400, GetDebugThread()=0x7f44a18400) Expected event thread
A/art: art/runtime/runtime.cc:422] Runtime aborting...
A/art: art/runtime/runtime.cc:422] Aborting thread:
A/art: art/runtime/runtime.cc:422] "JDWP" prio=5 tid=4 WaitingForDebuggerSend
A/art: art/runtime/runtime.cc:422]   | group="" sCount=0 dsCount=0 obj=0x12c60280 self=0x7f44a18400
A/art: art/runtime/runtime.cc:422]   | sysTid=24137 nice=0 cgrp=default sched=0/0 handle=0x7f4b904450
A/art: art/runtime/runtime.cc:422]   | state=R schedstat=( 132066712 16401043 106 ) utm=9 stm=2 core=3 HZ=100
A/art: art/runtime/runtime.cc:422]   | stack=0x7f4b80a000-0x7f4b80c000 stackSize=1005KB
A/art: art/runtime/runtime.cc:422]   | held mutexes= "abort lock"
A/art: art/runtime/runtime.cc:422]   native: #00 pc 000000000047e2cc  /system/lib64/libart.so (_ZN3art15DumpNativeStackERNSt3__113basic_ostreamIcNS0_11char_traitsIcEEEEiP12BacktraceMapPKcPNS_9ArtMethodEPv+220)
A/art: art/runtime/runtime.cc:422]   native: #01 pc 000000000047e2c8  /system/lib64/libart.so (_ZN3art15DumpNativeStackERNSt3__113basic_ostreamIcNS0_11char_traitsIcEEEEiP12BacktraceMapPKcPNS_9ArtMethodEPv+216)
A/art: art/runtime/runtime.cc:422]   native: #02 pc 0000000000452434  /system/lib64/libart.so (_ZNK3art6Thread9DumpStackERNSt3__113basic_ostreamIcNS1_11char_traitsIcEEEEbP12BacktraceMap+480)
A/art: art/runtime/runtime.cc:422]   native: #03 pc 00000000004403ac  /system/lib64/libart.so (_ZNK3art10AbortState10DumpThreadERNSt3__113basic_ostreamIcNS1_11char_traitsIcEEEEPNS_6ThreadE+56)
A/art: art/runtime/runtime.cc:422]   native: #04 pc 0000000000440228  /system/lib64/libart.so (_ZNK3art10AbortState4DumpERNSt3__113basic_ostreamIcNS1_11char_traitsIcEEEE+668)
A/art: art/runtime/runtime.cc:422]   native: #05 pc 0000000000433bfc  /system/lib64/libart.so (_ZN3art7Runtime5AbortEPKc+148)
A/art: art/runtime/runtime.cc:422]   native: #06 pc 00000000000e597c  /system/lib64/libart.so (_ZN3art10LogMessageD2Ev+1592)
A/art: art/runtime/runtime.cc:422]   native: #07 pc 00000000002f8458  /system/lib64/libart.so (_ZN3art4JDWP9JdwpState24AcquireJdwpTokenForEventEm+624)
A/art: art/runtime/runtime.cc:422]   native: #08 pc 00000000002f7b1c  /system/lib64/libart.so (_ZN3art4JDWP9JdwpState29SendRequestAndPossiblySuspendEPNS0_9ExpandBufENS0_17JdwpSuspendPolicyEm+248)
A/art: art/runtime/runtime.cc:422]   native: #09 pc 00000000002fcb08  /system/lib64/libart.so (_ZN3art4JDWP9JdwpState16PostClassPrepareEPNS_6mirror5ClassE+1380)
A/art: art/runtime/runtime.cc:422]   native: #10 pc 0000000000124a9c  /system/lib64/libart.so (_ZN3art11ClassLinker11DefineClassEPNS_6ThreadEPKcmNS_6HandleINS_6mirror11ClassLoaderEEERKNS_7DexFileERKNS9_8ClassDefE+804)
A/art: art/runtime/runtime.cc:422]   native: #11 pc 0000000000381d04  /system/lib64/libart.so (_ZN3artL25DexFile_defineClassNativeEP7_JNIEnvP7_jclassP8_jstringP8_jobjectS7_S7_+344)
A/art: art/runtime/runtime.cc:422]   native: #12 pc 00000000001dd40c  /system/framework/arm64/boot-core-libart.oat (???)
A/art: art/runtime/runtime.cc:422]   at dalvik.system.DexFile.defineClassNative(Native method)
A/art: art/runtime/runtime.cc:422]   at dalvik.system.DexFile.defineClass(DexFile.java:296)
A/art: art/runtime/runtime.cc:422]   at dalvik.system.DexFile.loadClassBinaryName(DexFile.java:289)
A/art: art/runtime/runtime.cc:422]   at dalvik.system.DexPathList.findClass(DexPathList.java:418)
A/art: art/runtime/runtime.cc:422]   at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:54)
A/art: art/runtime/runtime.cc:422]   at com.android.tools.fd.runtime.IncrementalClassLoader$DelegateClassLoader.findClass(IncrementalClassLoader.java:90)
A/art: art/runtime/runtime.cc:422]   at com.android.tools.fd.runtime.IncrementalClassLoader.findClass(IncrementalClassLoader.java:62)
A/art: art/runtime/runtime.cc:422]   at java.lang.ClassLoader.loadClass(ClassLoader.java:380)
A/art: art/runtime/runtime.cc:422]   at java.lang.ClassLoader.loadClass(ClassLoader.java:367)
A/art: art/runtime/runtime.cc:422]   at java.lang.ClassLoader.loadClass(ClassLoader.java:367)
A/art: art/runtime/runtime.cc:422]   at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
A/art: art/runtime/runtime.cc:422] Dumping all threads without appropriate locks held: thread list lock mutator lock
fmt.Println("Enter position to delete::")
fmt.Scanln(&pos)

new_arr := make([]int, (len(arr) - 1))
k := 0
for i := 0; i < (len(arr) - 1); {
    if i != pos {
        new_arr[i] = arr[k]
        k++
        i++
    } else {
        k++
    }
}

for i := 0; i < (len(arr) - 1); i++ {
    fmt.Println(new_arr[i])
}

我正在使用这个命令从切片中删除一个元素,但它不起作用,请建议。

我想对图中选定的几个勾号标签做一些修改。

例如,如果我这样做:

label = axes.yaxis.get_major_ticks()[2].label
label.set_fontsize(size)
label.set_rotation('vertical')

更改了标记标签的字体大小和方向。

然而,如果尝试:

label.set_text('Foo')

没有修改勾号标签。如果我这样做:

print label.get_text()

什么都没有印出来。

这里还有一些奇怪的事情。当我试着这样做时:

import matplotlib.pyplot as plt
import numpy as np

axes = plt.figure().add_subplot(111)
t = np.arange(0.0, 2.0, 0.01)
s = np.sin(2*np.pi*t)
axes.plot(t, s)
for ticklabel in axes.get_xticklabels():
    print(ticklabel.get_text())

只打印空字符串,但plot包含标记为'0.0'、'0.5'、'1.0'、'1.5'和'2.0'的刻度。

我运行下面的sql脚本在我的数据库:

create table cities (
id serial primary key,
name text not null
);

create table reports (
id serial primary key,
cityid integer not null references cities(id),
reportdate date not null,
reporttext text not null
);

create user www with password 'www';

grant select on cities to www;
grant insert on cities to www;
grant delete on cities to www;

grant select on reports to www;
grant insert on reports to www;
grant delete on reports to www;

grant select on cities_id_seq to www;
grant insert on cities_id_seq to www;
grant delete on cities_id_seq to www;

grant select on reports_id_seq to www;
grant insert on reports_id_seq to www;
grant delete on reports_id_seq to www;

当用户www试图:

insert into cities (name) values ('London');

我得到以下错误:

ERROR: permission denied for sequence cities_id_seq

我知道问题出在连续类型上。这就是为什么我将*_id_seq的选择、插入和删除权限授予www。但这并不能解决我的问题。我错过了什么?

我有一个相对的布局,我正在以编程方式创建:

 RelativeLayout layout = new RelativeLayout( this );
    RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT,
            LayoutParams.WRAP_CONTENT);

现在我有两个按钮,我想添加到这个相对布局。但问题是两个按钮都显示在relativelayout的左边,彼此重叠。

buttonContainer.addView(btn1);
buttonContainer.addView(btn2);

现在我想知道如何以编程方式设置android:layout_alignParentRight="true" 或android:layout_toLeftOf="@id/btn"属性的按钮,因为我们在xml?

React 16.3.0已经发布,Context API不再是实验特性。Dan Abramov (Redux的创造者)对此写了一篇很好的评论,但当时Context还只是一个实验性功能。

我的问题是,在你的观点/经验中,我什么时候应该使用React Context而不是React Redux,反之亦然?

我正在开发Android v2.2应用程序。

我有一个碎片。在我的片段类的onCreateView(…)回调中,我将一个布局膨胀到片段,如下所示:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.login, null);
        
    return view;
}

上面的膨胀布局文件是(login.xml):

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical">

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Username" />

    
    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Username" />

</LinearLayout>

我想设置一个paddingTop到上面的<LinearLayout>元素,我想在Java代码中做,而不是在xml中做。

如何设置paddingTop <LinearLayout>在我的片段Java类代码??

在MS SQL-Server,我可以做:

SELECT ISNULL(字段,'空'

但是在PostgreSQL中,我得到了一个语法错误。我如何模拟ISNULL()功能?

我用c#开发了一个Windows服务。生成PDF报告。要生成PDF文件,我使用第三方dll。应用程序在我的Windows XP平台上运行。当我在Windows Server 2008 64位版本中部署服务时,我得到了这个错误:

检索的COM类工厂 带有CLSID的组件 {46521 b1f - 0 a5b - 4871 - a4c2 fd5c9276f4c6} 由于以下错误导致失败: 80040154.

我使用regsvr32命令注册了DLL。我能够在注册表中看到这个CLSID。但问题依然存在。

有什么问题吗?