小编mys*_*boy的帖子

我有一大堆哈希,我想从数组中获取一些哈希并插入新数组而不更改第一个数组.我有问题将哈希推送到数组,如何访问作为哈希的第i个元素.

my @myarray;
$my_hash->{firstname} = "firstname";
$my_hash->{lastname} = "lastname";
$my_hash->{age} = "25";
$my_hash->{location} = "WI";
push @myarray,$my_hash;

$my_hash->{firstname} = "Lily";
$my_hash->{lastname} = "Bily";
$my_hash->{age} = "22";
$my_hash->{location} = "CA";
push @myarray,$my_hash;

$my_hash->{firstname} = "something";
$my_hash->{lastname} = "otherthing";
$my_hash->{age} = "22";
$my_hash->{location} = "NY";
push @myarray,$my_hash;

my @modifymyhash;
for (my $i=0;$i<2; $i++)  {
        print "No ".$i."\n";
        push (@modifymyhash, $myarray[$i]);
        print "".$myarray[$i]."\n";  #How do I print first ith element of array which is hash.
 }

嗨我有下面的代码,我的输入事件永远不会触发,任何帮助将不胜感激.

    items: [{
            xtype: 'textfield',
            id: 'idhere',
            name: 'namehere',
            fieldLabel: 'lablehere:',
            width: 500,
            handler: {
                  key:13,
                  fn : function () {
                  if (e.getKey() == e.ENTER) {
                           alert("You pressed an enter button in text field.");
    }
                  }

            }
        },{
            xtype: 'button',
            text: 'texttodisplay',
            handler: function() {
                                  //my function.
            }

        }]

我实际上通过使用:

listeners:  {
                specialkey: function (f,e) {    
                     if (e.getKey() == e.ENTER) {
                        loadData();
                    }
                }
            }

我无法连接到数据库.我的凭据是正确的.我能够使用Oracle SQL Developer进行连接.我收到以下错误.任何帮助将不胜感激.

> INFO: Loaded JDBC driver: com.microsoft.sqlserver.jdbc.SQLServerDriver
Jul 24, 2012 2:38:39 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet dispatcher threw exception
java.sql.SQLException: No suitable driver found for jdbc:mysql://XX.1.1.XX:3306/dashboard
    at java.sql.DriverManager.getConnection(Unknown Source)
    at java.sql.DriverManager.getConnection(Unknown Source)
    at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:173)
    at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriver(DriverManagerDataSource.java:164)
    at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnectionFromDriver(AbstractDriverBasedDataSource.java:149)
    at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnection(AbstractDriverBasedDataSource.java:119)
    at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)
    at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:381)
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:455)
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:463)
    at com.mvc.services.TransactionInfoService.getData(TransactionInfoService.java:39)
    at com.mvc.controllers.MainController.handleRequestInternal(MainController.java:29)
    at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
    at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) …

我想实现:

public Object getPrevious(); and reset() method.

*它应该返回使用SAME内部维护的指针作为getNext(),*通过getNext()或getPrevious()返回上一次返回的项目前面的列表中节点的内容*

并重置将重置列表,以便getPrevious()和getNext()从头开始,它应该表现得好像我们从未调用过那些方法.

在单链表中.我已经实施了:

public int length();
public Object first();
public Object last();
public boolean lookup(Object obj);
public Object get(int n);
public void add(Object o);
public int find(Object obj);
public void delete(Object obj);
public void delete(int n)

我有我的字符串如下,我想删除第一个{没有任何东西只有第一个是字符串的开头.字符串在替换之前打印正常但在替换其空字符串之后.

use strict;
use warnings;

my $string = {"something":[{"some":"12","some":"something","data":"","data":"data2","age":"23"},{......},{.....}]}

# the string is valid as it is json from some array function.

print $string."\n";   #My string prints fine here
 $string = s/\{//;

print "String after replacement".".$string." testing";