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Laravel Check If Related Model Exists
...method calls through to an Eloquent query Builder, which is set up to only select the related objects. That Builder in turn passes unknown method calls through to its underlying query Builder.
This means you can use the exists() or count() methods directly from a relation object:
$model->relati...
MongoDB mongorestore failure: locale::facet::_S_create_c_locale name not valid
...
I solved this way:
su
apt-get install locales
dpkg-reconfigure locales # select locales you want!
Now mongodb should start.
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Easy way to list node modules I have npm linked?
...r ls command
the -F option adds an '@' indicator for links
the sed command selects those links and removes the indicator
the xargs part passes previous output as arguments to npm ...
npm is invoked with
list or ls to list modules with versions
replace with ll to get details about each listed mod...
“cannot resolve symbol R” in Android Studio
... compileSdkVersion 21
buildToolsVersion '21.0.1'
......
....
}
Or
Select File | Project Structure change Build Tools Version to 21.1.1
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Creating JSON on the fly with JObject
...item =
from p in posts
orderby p.Title
select new
{
title = p.Title,
description = p.Description,
link = p.Link,
category = p.Categories
}
}
});
Json.net documentation fo...
REST APIs: custom HTTP headers vs URL parameters
... true metadata about the request for custom headers.
HTTP has a very wide selection of headers that cover most everything you'll need. Where I've seen custom headers come up is in a system to system request operating on behalf of a user. The proxy system will validate the user and add "X-User: us...
LR性能测试结果样例分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...场景执行过程中SQL语句的执行情况，从图中可以看到，“Selects（查询）”与“Inserts（插入）”两种语句执行的趋势在场景执行过程中是比较平滑，并且测试中没有错误发现，也就说明在处理相关业务时Mysql的处理是正常的。假...
How to detect a textbox's content has changed
...s of editing textbox content that do not involve any keypress. For example selecting a range of text then right-click-cut. Or dragging it. Or dropping text from another app into the textbox. Or changing a word via the browser's spell-check. Or...
So if you must detect every change, you have to poll...
How to merge two sorted arrays into a sorted array? [closed]
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+1, Thanks for sharing. One question: why did you select the type of array and type of variable 'temp', long?
– Hengameh
Jul 13 '15 at 3:49
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What's NSLocalizedString equivalent in Swift?
...ich make things really easy by just highlighting text, right-clicking, and selecting the menu item.
– Ethan Allen
May 11 at 0:14
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