我在sqlite db中有一个名为[tblbook]的表,其中有一列[authors].我在sql中尝试做的是将作者值拆分为firstname和lastname并在lastname上对其进行排序.我找到了这个很棒的代码:
SELECT substr(BookAuthor, 1, NULLIF(CHARINDEX(' ', BookAuthor) - 1, -1)) AS [FirstName],
substr(BookAuthor, CHARINDEX(' ', BookAuthor) + 1, LEN(BookAuthor)) AS [LastName]
FROM tblBook where _id=3
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它在MSSQL上运行完美,但sqlite没有charindex函数,因此失败了.
任何人都可以请善意,并告诉我什么应该是实现这一目标的最佳方法.
我正在为拥有多家商店的客户开发iphone应用程序(目标C).我有一个数组中所有商店(20)的坐标(纬度,长度).
目前我正在考虑循环遍历商店的坐标数组,并获取用户当前位置到商店位置的距离,然后将它们添加到数组中并对最低距离进行排序.
这是一种正确的方法还是非常耗费资源?
最近的SOF问题就是这个问题,但它是在python中: 提取最近的商店
提前感谢您的建议.
嗨我正在尝试使用登录服务为angular.js中的单页应用程序打开某些部分(即'call.html'不执行身份验证).
我想知道如何获取路径(http://www.example.com/app/#/call/1234),以便我可以比较它并重定向到"登录"页面,如果该页面不是'call.html '?
我的app.js中有以下代码似乎有效,但在Chrome中不起作用,我收到以下错误:
TypeError: $location.path(...).contains is not a function
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我app.js.
app.run(['$rootScope', '$location', '$cookieStore', '$http',
function ($rootScope, $location, $cookieStore, $http)
{
$rootScope.globals = $cookieStore.get('globals') || {};
if ($rootScope.globals.currentUser)
{
$http.defaults.headers.common['Authorization'] = 'Basic' + $rootScope.globals.currentUser.authdata; // jshint ignore:line
}
$rootScope.$on('$locationChangeStart', function (event, next, current)
{
// redirect to login page if not logged in
if($location.path().contains('call'))
{
return;
}
else
{
if ($location.path() !== '/login' && !$rootScope.globals.currentUser && $location.path() !=='/')
{
$location.path('/login');
}
}
});
}
]);
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如何解决这个问题的任何帮助将不胜感激.
我将数据从Vb.net客户端发布到PHP rest api但由于某种原因json_decode不能处理传递的字符串.发布到服务器的代码是:
Dim payload As String = "{""key"":""Test"",""bookings"":" & txtUpload.Text & "}"
Dim request As WebRequest = WebRequest.Create(String.Format(baseAPIImportUrl))
' Set the Method property of the request to POST.
request.Method = "POST"
' Create POST data and convert it to a byte array.
Dim byteArray() As Byte = Encoding.UTF8.GetBytes(payload)
' Set the ContentType property of the WebRequest.
request.ContentType = "application/x-www-form-urlencoded"
' Set the ContentLength property of the WebRequest.
request.ContentLength = byteArray.Length
' Get the request stream.
Dim dataStream As Stream …
Run Code Online (Sandbox Code Playgroud) 我需要允许多个角色在C#Web API的控制器中访问方法。
I have a custom AuthorizeAttribute
which takes an enum of role type, how can I make it so it accepts multiple enums ie. a variable length array of enums.
This is the code I have written for the Attribute
:
private readonly RoleEnum roleInApplication;
public ScopeAuthorizeAttribute(RoleEnum roleInApplication)
{
this.roleInApplication = roleInApplication;
}
public override void OnAuthorization(HttpActionContext actionContext)
{
base.OnAuthorization(actionContext);
.......
var relatedPermisssionRole = (db call to get the rolename..etc)
RoleEnum role;
if (Enum.TryParse(relatedPermisssionRole, out role) && role == …
Run Code Online (Sandbox Code Playgroud) 我有一个字符串数组,我想将它们显示为逗号分隔的字符串,但在最后一个元素上添加“ and”。例如我有
var fruits = ["Banana", "Orange", "Apple", "Mango"];
var energy = fruits.join(' ,');
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输出
'Banana, Orange, Apple, Mango'
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有什么办法我给最后一个单词加上“和”,以便输出
'Banana, Orange, Apple and Mango'
Run Code Online (Sandbox Code Playgroud) 我正在尝试使用以下代码在PHP中清除字符串,但是我不确定如何在使用空格之前同时删除括号和括号内的文本。
我使用的代码是:
$string = "Deadpool 2 [Region 4](Blu-ray)";
echo preg_replace("/\[[^)]+\]/","",$string);
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我得到的输出是:
Deadpool [](Blu-ray)
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但是,所需的输出是:
Deadpool 2
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