我有以下csv文件:
upc/ean/isbn,item name,category,supplier id,cost price,unit price,tax 1 name,tax 1 percent,tax 2 name,tax 2 percent,quantity,reorder level,description,allow alt. description,item has serial number
,Apple iMac,Computers,,10,12,8,8,10,10,10,1,Best computer,,
,Apple iMac,Computers,,10,12,8,8,10,10,10,1,Best computer,,
,Apple iMac,Computers,,10,12,8,8,10,10,10,1,Best computer,,
,Apple iMac,Computers,,10,12,8,8,10,10,10,1,Best computer,,
,Apple iMac,Computers,,10,12,8,8,10,10,10,1,Best computer,,
,Apple iMac,Computers,,10,12,8,8,10,10,10,1,Best computer,,
,Apple iMac,Computers,,10,12,8,8,10,10,10,1,Best computer,,
,Apple iMac,Computers,,10,12,8,8,10,10,10,1,Best computer,,
,Apple iMac,Computers,,10,12,8,8,10,10,10,1,Best computer,,
,Apple iMac,Computers,,10,12,8,8,10,10,10,1,Best computer,,
,Apple iMac,Computers,,10,12,8,8,10,10,10,1,Best computer,,
,Apple iMac,Computers,,10,12,8,8,10,10,10,1,Best computer,,
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当我这样做:
if (($handle = fopen($_FILES['file_path']['tmp_name'], "r")) !== FALSE)
{
$data = fgetcsv($handle);
var_dump($data);
}
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我得到一个包含183个元素的数组,我希望只得到一行csv,但我得到整个文件.
我甚至尝试过$data = fgetcsv($handle, 1000);,我得到了相同的结果
如何修改或预处理<body>标记以添加类主体?我不想创建一个完整的html.tpl.php来添加一个类.
是否可以使用link to rails在rails中生成绝对URL?[注意:这是在MAILER]
我试着这样做:
<%= link_to root_url, root_url%>
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但是我收到运行时错误:
*缺少主机链接!请提供:host参数或设置default_url_options [:host]*
我需要它是动态的,因为应用程序将在通配符域(*.domain.com)上运行
我可不可以做:
explode("\n", $_POST['thetextarea']);
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并让它适用于所有平台?(我问的问题是它将永远是\ r \n而不只是\n")
编辑:
我忘了提到我将$ _POST ['thetextarea']保存到mysql数据库VARCHAR 255.似乎\ r \n转换为\n.
如果我有一个名为"Book"的模型和一个名为"Library"的集合,定义如下:
书
app.Book = Backbone.Model.extend({
defaults: {
title: 'No title',
author: 'Unknown'
}
});
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图书馆
app.Library = Backbone.Collection.extend({
model: app.Book,
url: '/api/books'
});
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当我打电话BookInstance.save()告诉它如何使用URL?它是从集合中派生出来的吗?
在Backbone.model有2种选择:url和urlRoot.这些之间的目的和区别是什么?
在Backbone.collection,有一个参数url.这总是对RESTFUL api的GET请求吗?
我有一个字符串(来自文件):
ILX (New for 2013!)
Overview: The least expensive route to Honda's premium-label goodness
Drivetrain: Two four-cylinder engines to choose from as well as a gas-electric hybrid; front-wheel-drive only.
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我如何得到字符串:
$writeup = file_get_contents($car_files_path . $manufacture . '/Stories/'.$story);
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我想匹配概述线(Overview: The least expensive route to Honda's premium-label goodness).实现这一目标的最佳方法是什么.
我试过.*\n,但这会匹配所有内容,然后是新行.有没有办法使正则表达式不贪婪?
我试过了:
preg_match('/^Overview:\s.*$/im', $writeup, $overall_matches)我没有得到任何比赛
//FAST
db.datasources.find().count()
12036788
//SLOW
db.datasources.find({nid:19882}).count()
10161684
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关于nid的索引
有什么办法让第二个查询更快?(需要大约8秒钟)
从这个字符串返回的可能字符的范围是多少?
function base64url_encode($data)
{
return rtrim(strtr(base64_encode($data), '+/', '-_'), '=');
}
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我的猜测是 [a-z0-9-_]
错误:
1071 - 指定密钥太长; 最大密钥长度为1000字节
CREATE TABLE `phppos_modules_actions` (
`action_id` VARCHAR( 255 ) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL ,
`module_id` VARCHAR( 255 ) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL ,
`action_name_key` VARCHAR( 255 ) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL ,
`sort` INT NOT NULL ,
PRIMARY KEY ( `action_id` , `module_id` )
) ENGINE = INNODB CHARACTER SET utf8 COLLATE utf8_unicode_ci;
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我知道错误发生的原因是255x2x3(每个字符3个字节)
这不会发生在所有安装上.我可以更改什么设置?
我试图在http://blastoserver.com/上运行rails 3.0.5应用程序并运行.你可以在那里看到错误.(回溯)
有任何想法吗?