在Netbeans和Eclipse中,您可以按CTRL + Shift + Down(我认为这是netbeans),它将复制一行代码.这可能在SQL Server Management Studio中吗?这与SQL Server 2008一起运行
考虑:
public proj 3 {
static string [][]Item;
public static void main(String [] args){
Item[][] = {
{"BH," , "Backhoe," , "200.00"},
{"ER," , "Electric Rake," , "10.00"},
{"EL," , "Electric Lawnmower," , "15.00"},
{"TR," , "Trencher" , "35.00"},
{"MU," , "Mulcher," , "20.00"},
{"TS," , "Tree Sprayer," , "22.00"},
{"CP," , "Cider Press," , "30.00"},
{"PR," , "Pruner," , "12.00"},
{"GE," , "Gas Edger," , "20.00"},
{"RO," , "Roller," , "8.00"},
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我怎么能这样做,所以我可以用不同的方法调用数组?
问题
我想将当前记录集行插入MS Access表.我目前收到此错误
Syntax error (missing operator) in query expression 'rs[columnname]'
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码
这是我当前的代码,我试图抓住所有列并将它们插入到新表中.
DoCmd.RunSQL "INSERT INTO tblSummary_Appl_Usage_score VALUES (rs[Configuration], rs[User Input / Output])"
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我不太清楚我错过了什么.
我希望能够在Informix DB中搜索列.在主表中有一个cust_nbr列,然后在未知数量的表中引用.
在Informix中,有没有办法查询数据库并获取所有使用cust_nbr的表?
我试图保存/写一个数组到文件目录,我完全卡住了.我已经在线查看了多个来源的代码.我从和NSArray切换到NSMutableArray,但是没有用.据我所知,文件没有被写入,因为测试将返回null.提前致谢
NSArray *results = [parser objectWithData:data1];
NSMutableArray *array2 = [[NSMutableArray alloc] initWithArray:results];
// Create a dictionary from the JSON string
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:@"EmployeeData.plist"];
//NSLog(@"the path is %@, the array is %@", path, array2);
/////write to file/////
[array2 writeToFile:path atomically:YES];
NSMutableArray *test = [[NSMutableArray alloc ]initWithContentsOfFile:path];
NSLog(@"the test is %@", test);
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**更新**
我添加了这些代码行
BOOL write = [results writeToFile:path atomically:YES];
NSLog(@"did it right? %@", write);
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并且写为null,这是什么意思?
这是我的Array中的众多对象之一
{
0 …Run Code Online (Sandbox Code Playgroud) 我的朋友和我正在尝试创建一个将文件保存到设备的应用程序.我们使用此代码写入外部SD卡,它在他的Droid X和三星Galaxy Tab上运行良好.
获取SD卡的路径:
private static final File ROOT = Environment.getExternalStorageDirectory();
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创建文件夹路径和文件:
FileWriter fw = new FileWriter(ROOT + "/test/" + "time_frames.txt");
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我们正在使用文档工厂来创建文档
所以你可以看到我们创建路径然后尝试保存到刚刚创建的路径
File file = new File(ROOT + "/test/" + "time_frames.txt");
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当我在我的Nexus S(没有SD卡)上运行它时,使用完全相同的代码时遇到问题.
private static final File ROOTtest = Environment.getExternalStorageDirectory();
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这返回/数据
private static final File ROOT = Environment.getRootDirectory();
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这会返回/ mnt/sdcard
private static final File intData = Environment.getDataDirectory();
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这返回/系统
我的问题是哪一个适用于具有SD卡且没有SD卡的设备?我已经尝试了很多,但尝试所有这些东西真的让我很困惑.提前致谢
有人可以解释为什么我收到此错误
Type mismatch: cannot convert from String to String[][][]
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在这段代码?
String [][][][] names = {"zach","zach","zach","zach"};
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我有NSMutableDictionaries的NSMutableDictionary.我创建了一个搜索术语的字典,现在我想显示它们.我使用一种方法(下面)将包含搜索词的项复制到另一个词典中.我知道它正在复制,因为我可以打印字典并查看结果.此外,还会显示正确的行数,但不会显示其中的数据.我已经包含了复制字典的方法,以及字典在原始数组中看起来喜欢的内容以及它在新数组中的样子.
问题
我对从NSDictionaires中提取物品的理解是不正确的.我已经阅读了多个地方,我知道我想使用objectforkey.但我无法弄清楚如何将字典从主词典中删除并显示出来.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
if (searching) {
//ATTEMPT ONE
// NSDictionary *searchEmp = [copyListOfItems objectForKey:[copyListOfItems allkeys]];
// cell.textLabel.text = [[searchEmp objectForKey:kFULLNAME_TAG] objectAtIndex:indexPath.row];
//ATTEMPT TWO
NSString *name = [[copyListOfItems allKeys] objectAtIndex: indexPath.row];
NSString *value = [copyListOfItems objectForKey:path];
cell.textLabel.text = [copyListOfItems objectForKey:value];
}else{
NSDictionary *employee = [[self.orderedSections valueForKey:[[[self.orderedSections allKeys] sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)] objectAtIndex:indexPath.section]] objectAtIndex:indexPath.row];
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