小编Phi*_*oss的帖子

如何禁用我的rails站点的缓存？

我正在运行Passenger(mod_rails),我的网站正在'开发'模式下运行:

'ENV['RAILS_ENV'] ||= 'development'

有帮助吗？

我得到的错误是在while循环中的fillPayroll()方法中,它表示payroll.add(employee).错误说我不能在数组类型Person上调用add()但是Employee类继承自Person,所以我认为这是可能的.谁能为我澄清一下这个？

import java.io.*;
import java.util.*;

public class Payroll
{   
    private int monthlyPay, tax;
    private Person [] payroll = new Person [1];

        //Method adds person to payroll array
    public void add(Person person)
    {
        if(payroll[0] == null) //If array is empty, fill first element with person
        {
            payroll[payroll.length-1] = person;
        }
        else //Creates copy of payroll with new person added
        {
            Person [] newPayroll = new Person [payroll.length+1];
            for(int i = 0;i<payroll.length;i++)
            {
                newPayroll[i] = payroll[i];
            }
            newPayroll[newPayroll.length] = person;
            payroll = …

package Algorithms;
import cs1.Keyboard;
import java.util.*;

public class SieveofEratosthenes2 {
    public static void main (String[] args){

        //input number and create an array with the length of (num-1)
        int num = Keyboard.readInt();
        ArrayList prime = new ArrayList(num);

        //populate array with all numbers from 2 to num
        for(int i = 0; i < prime.size()-1; i++)
        {
            Integer temp = new Integer(i+2);
            prime.add(i, temp);
        }
        System.out.println(prime.size());

如果我有一个字符串:get schwifty我希望最终得到get\|schwifty,我要尝试的第一件事是:

echo "get schwifty" | tr ' ' "\|"

然而,这失败了,只返回管道.如果我尝试使用多个反斜杠,则相反的情况发生,我只得到反斜杠而不是管道.

我怎么能最终得到get\|schwifty？

我正在添加数组中保存的值,但总和是实际应该是+1.

//update totalscore
    uint newTotalScore;

    for (uint i=0; i< [bestscoresArray count] ; i++) {      
        newTotalScore += [[bestscoresArray objectAtIndex:i] intValue];  

    }


    totalscore = newTotalScore;

//输出l1bestscore = 15900,l2bestscore = 7800,l3bestscore = 81000,l4bestscore = 81000,l5bestscore = 0,l6bestscore = 0,l7bestscore = 0,l8bestscore = 0,l9bestscore = 0,l10bestscore = 0,totalscore = 185701

如您所见,totalscore输出为185701,但所有值的总和为185700.

有人会有任何想法为什么会这样吗？

谢谢,

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