我正在使用Rails 2.3.11和Bundler 1.0.10.
乘客返回错误
Could not find addressable-2.2.4 in any of the sources (Bundler::GemNotFound)
我安装了手动寻址2.2.4和我捆绑它gem 'addressable', '2.2.4'做了一个bundle install和打捆说Using addressable (2.2.4).
仍有上述错误.
我正在使用Passenger作为Apache2模块.我在Ruby 1.9.2中使用RVM.乘客运行1.8.7.即使使用RVM将Ruby切换到1.8.7也无法解决问题.
我有一个带JPanel的主应用程序窗口(JFrame).在JPanel上我有一些按钮.单击其中一个按钮后,我创建了JDialog窗口,用户可以在其中选择两个选项:"执行"或"取消".单击"执行此操作"后,对话框将关闭,然后我创建一些带有进度条的进度窗口(另一个JDialog).在进度窗口中,我执行具有长任务的swingworker.任务完成后,我会显示消息对话框(JOptionPane.showOptionDialog),其中包含有关任务结果("成功"或"失败")的信息.此任务的结果确定主应用程序窗口的状态(我更改按钮上的标签,例如"登录"/"注销").如何将此swingworker(在方法done()中)的结果"发送"到主应用程序窗口以刷新主应用程序窗口的状态(更改按钮的标签)？我是否需要某种控制器,可能是监听器或仅引用主应用程序窗口？
先谢谢你,seishin
可能重复:
JButton需要更改JTextfield文本
如何清除a JTextField何时JButton被点击？
我不能导出一个类:
#ifndef SDBIDI
#define SDBIDI
#ifndef SDBIDI_FLAG
#define SDBIDI_ORIENT __declspec(dllimport)
#else
#define SDBIDI_ORIENT __declspec(dllexport)
#endif
#include "TCInfoSuVars.h" //class is here!
SDBIDI_ORIENT int myFoo(FILE *file); // exporting function
#endif
TCInfoSuVars.h中的类定义
#pragma once
#include <string>
#include <hash_map>
class SDBIDI_ORIENT TCInfoSuVars
{
public:
std::string id;
std::string tcVal;
TCInfoSuVars();
TCInfoSuVars(std::string _tcVal, std::string _id);
~TCInfoSuVars();
};
得到错误:
myProgram.cpp
#define SDBIDI_FLAG
输出:
TCInfoSuVars.h(14) : error C2470: 'TCInfoSuVars' : looks like a function definition, but there is no parameter list; skipping apparent body
如果我写
class __declspec(dllexport) TCInfoSuVars …我有一个简单的3列csv文件,我需要使用python根据一个键对每一行进行分组,然后平均另一个键的值并返回它们.文件是标准的csv格式,设置如下;
ID, ZIPCODE, RATE
1, 19003, 27.50
2, 19003, 31.33
3, 19083, 41.4
4, 19083, 17.9
5, 19102, 21.40
基本上我需要做的是计算该文件中每个唯一zipcode col [1]的平均速率col [2]并返回结果.因此,获得19003,19083等所有记录的平均费率.
我已经看过使用csv模块并将文件读入字典,然后根据zipcode col中的唯一值对dict进行排序,但似乎无法取得任何进展.
任何帮助/建议表示赞赏.
如果我有一个字段,比如project_id,我想要计算出现次数,我会做类似的事情:
select project_id, count(project_id) as count from tbl group by project_id, order by count desc
如果我想计算同一个表中两个字段组合的出现次数,即计算project_id和service_id组合唯一的行数,该怎么办？
所以,我的表中记录如下:
project_id service_id
1 1
1 2
1 2
1 2
1 2
1 3
1 4
1 4
1 4
I would want the result of my query to be something like:
project_id service_id count
1 1 1
1 2 4
1 3 1
1 4 3
我需要egrep一个在运行时之前未知的字符串,我将通过shell变量获取(shell是bash,如果这很重要).问题是,该字符串将包含特殊字符,如大括号,空格,点,斜线等.
如果我知道字符串,我可以一次一个地逃避特殊字符,但是我怎么能为整个字符串做到这一点？
通过sed脚本运行字符串为每个特殊字符添加前缀可能是一个想法,我仍然需要rtfm应该如何编写这样的脚本.我不知道是否有其他更好的选择.
我确实阅读了,re_format(7)但似乎没有像"将整个下一个字符串视为文字"这样的事情......
编辑:为了避免误报,我还应该为模式添加换行检测,例如. egrep '^myunknownstring'
我刚刚升级到xcode 4.0,我无法再部署到iPhone,我得到Apple Mach-O链接器错误,但它仍适用于模拟器.
Ld /Users/yveswheeler/Library/Developer/Xcode/DerivedData/iParcel-fkeqjcjcbbhjwhdssjptkdxzzzxh/Build/Intermediates/iParcel.build/Debug-iphoneos/iParcel.build/Objects-normal/armv7/iParcel normal armv7
cd /Users/yveswheeler/iParcel
setenv IPHONEOS_DEPLOYMENT_TARGET 3.2
setenv PATH "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/g++-4.2 -arch armv7 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk -L/Users/yveswheeler/Library/Developer/Xcode/DerivedData/iParcel-fkeqjcjcbbhjwhdssjptkdxzzzxh/Build/Products/Debug-iphoneos -F/Users/yveswheeler/Library/Developer/Xcode/DerivedData/iParcel-fkeqjcjcbbhjwhdssjptkdxzzzxh/Build/Products/Debug-iphoneos -filelist /Users/yveswheeler/Library/Developer/Xcode/DerivedData/iParcel-fkeqjcjcbbhjwhdssjptkdxzzzxh/Build/Intermediates/iParcel.build/Debug-iphoneos/iParcel.build/Objects-normal/armv7/iParcel.LinkFileList -dead_strip -all_load -ObjC -lxml2 -miphoneos-version-min=3.2 -framework UIKit -framework CoreGraphics -framework QuartzCore /Users/yveswheeler/Library/Developer/Xcode/DerivedData/iParcel-fkeqjcjcbbhjwhdssjptkdxzzzxh/Build/Products/Debug-iphoneos/libThree20.a /Users/yveswheeler/Library/Developer/Xcode/DerivedData/iParcel-fkeqjcjcbbhjwhdssjptkdxzzzxh/Build/Products/Debug-iphoneos/libThree20Core.a /Users/yveswheeler/Library/Developer/Xcode/DerivedData/iParcel-fkeqjcjcbbhjwhdssjptkdxzzzxh/Build/Products/Debug-iphoneos/libThree20Network.a /Users/yveswheeler/Library/Developer/Xcode/DerivedData/iParcel-fkeqjcjcbbhjwhdssjptkdxzzzxh/Build/Products/Debug-iphoneos/libThree20Style.a /Users/yveswheeler/Library/Developer/Xcode/DerivedData/iParcel-fkeqjcjcbbhjwhdssjptkdxzzzxh/Build/Products/Debug-iphoneos/libThree20UI.a /Users/yveswheeler/Library/Developer/Xcode/DerivedData/iParcel-fkeqjcjcbbhjwhdssjptkdxzzzxh/Build/Products/Debug-iphoneos/libThree20UICommon.a /Users/yveswheeler/Library/Developer/Xcode/DerivedData/iParcel-fkeqjcjcbbhjwhdssjptkdxzzzxh/Build/Products/Debug-iphoneos/libThree20UINavigator.a -framework AddressBook -lz.1.2.3 -framework Foundation -framework CFNetwork -framework MobileCoreServices -framework SystemConfiguration -framework MessageUI -framework AudioToolbox -o /Users/yveswheeler/Library/Developer/Xcode/DerivedData/iParcel-fkeqjcjcbbhjwhdssjptkdxzzzxh/Build/Intermediates/iParcel.build/Debug-iphoneos/iParcel.build/Objects-normal/armv7/iParcel
arm-apple-darwin10-g++-4.2.1: /Users/yveswheeler/Library/Developer/Xcode/DerivedData/iParcel-fkeqjcjcbbhjwhdssjptkdxzzzxh/Build/Products/Debug-iphoneos/libThree20.a: No such file or directory
arm-apple-darwin10-g++-4.2.1: /Users/yveswheeler/Library/Developer/Xcode/DerivedData/iParcel-fkeqjcjcbbhjwhdssjptkdxzzzxh/Build/Products/Debug-iphoneos/libThree20Core.a: No such file or directory
arm-apple-darwin10-g++-4.2.1: /Users/yveswheeler/Library/Developer/Xcode/DerivedData/iParcel-fkeqjcjcbbhjwhdssjptkdxzzzxh/Build/Products/Debug-iphoneos/libThree20Network.a: No such file or directory …嗨,我有一些代码被Findbugs报告为NP_GUARANTEED_DEREF问题.现在看我的代码我不太明白它有什么问题,任何人都可以提出问题所在.
public void test() {
String var = "";
int index = 2;
if (index == -1) {
var = String.class.getName();
if (var.length() == 0) {
var = null;
}
} else {
var = Integer.class.getName();
if (var.length() == 0) {
var = null;
}
}
if (var == null) {// FINBUGS reports on this line NP_GUARANTEED_DEREF
/*
* There is a statement or branch that if executed guarantees that a value
* is null at this point, and that …