我收集了6000个股票的10M文件,股票名称已编入索引.当我订阅一个新的股票时,流星挂起超过10秒钟,以获得该股票的约3000份文件.在订购了几只股票后,流星也会以100%的CPU使用率挂起.同步"大"系列时,流星看起来很慢.实际上我的应用程序只是只读.我想知道是否有办法加速只读客户端的流星？我也想知道为每个股票创建一个单独的集合有帮助吗？
我正在开发一个Cordova Plugin,我想补充一下
android:allowBackup="true"
进入AndroidManifest.xml,但我不知道如何指定它plugin.xml.
我试过这个 例子,但它不起作用.显然它没有设置IPPROTO_IP/IP_MULTICAST_IF选项.我只能为IPPROTO_IP/IP_MULTICAST_IF找到boost :: asio :: ip :: multicast :: outbound_interface,我试过但失败了.有没有办法让boost :: asio :: ip :: multicast工作而不需要调用c-level setsockopt？
boost::asio::ip::udp::endpoint listen_endpoint(
listen_address, multicast_port);
socket_.open(listen_endpoint.protocol());
socket_.set_option(boost::asio::ip::udp::socket::reuse_address(true));
socket_.bind(listen_endpoint);
// Join the multicast group.
socket_.set_option(
boost::asio::ip::multicast::join_group(multicast_address));
该文件没有具体说明.我认为我们不需要删除它,因为它是我们唯一的设备ID,其他具有不同id的设备不会受到影响.但这只是我的猜测.
我想在unordered_map中存储小对象,只是想知道是否可以复制/释放包含的对象,如果有任何插入/删除/重新执行操作？我认为unordered_map使用链接列表来存储键/值对,它不需要复制/释放像vector这样的对象用于内存重新分配.
该文件不清楚.如何在localhost中安装证书等？
force-ssl
This package causes Meteor to redirect insecure connections (HTTP) to a secure URL (HTTPS). Use this package to ensure that communication to the server is always encrypted to protect users from active spoofing attacks.
To simplify development, unencrypted connections from localhost are always accepted over HTTP.
Application bundles (meteor bundle) do not include an HTTPS server or certificate. A proxy server that terminates SSL in front of a Meteor bundle must set the standard x-forwarded-proto header for the …在gcc-4.5下,它打印0,在gcc-4.6下,打印1.
#include <iostream>
enum VenueId: char {};
int
main (int argc, char ** argv)
{
VenueId v = (VenueId)'P';
std::cout << (v=='P') << std::endl;
return 0;
}
我正在尝试使用cordova-plugin-crosswalk-webview将crosswalk-lite添加到我的cordova项目中.我在我的github页面上创建了https://download.01.org/crosswalk/releases/crosswalk-lite/android/canary/10.39.237.1/arm/crosswalk-webview-10.39.237.1-arm.zip的maven repos ,并修改了xwalk.gradle指向我的maven.建设没关系,apk文件大小也看起来像预期的那样.
cordova plugin add https://github.com/Poordeveloper/cordova-plugin-crosswalk-webview
但是应用程序崩溃了.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2396)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2448)
at android.app.ActivityThread.access$600(ActivityThread.java:173)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1392)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5469)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:857)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:624)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.RuntimeException: Failed to create webview.
at org.apache.cordova.CordovaWebViewImpl.createEngine(CordovaWebViewImpl.java:82)
at org.apache.cordova.CordovaActivity.makeWebViewEngine(CordovaActivity.java:191)
at org.apache.cordova.CordovaActivity.makeWebView(CordovaActivity.java:187)
at org.apache.cordova.CordovaActivity.init(CordovaActivity.java:135)
at org.apache.cordova.CordovaActivity.loadUrl(CordovaActivity.java:209)
at com.carriez.carbroker.MainActivity.onCreate(MainActivity.java:32)
at android.app.Activity.performCreate(Activity.java:5226)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1151)
at com.lbe.security.service.core.client.b.x.callActivityOnCreate(Unknown Source)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2360)
... 11 more
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
at org.apache.cordova.CordovaWebViewImpl.createEngine(CordovaWebViewImpl.java:80)
... 20 more …如果a和b都是> 0的整数,想知道下面的断言是否正确.浮点数精度会导致这种情况下的问题吗？
assert(a%b || floor(a/(double)b)*b==a);