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Uniq by object attribute in Ruby
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Use Array#uniq with a block:
@photos = @photos.uniq { |p| p.album_id }
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IntelliJ IDEA generating serialVersionUID
How do generate this value in IntelliJ IDEA?
12 Answers
12
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Why can a function modify some arguments as perceived by the caller, but not others?
... @MarkRansom, I think it does make sense if you want to provide optional output destination as in: def foo(x, l=None): l=l or []; l.append(x**2); return l[-1].
– Janusz Lenar
Aug 31 '12 at 13:03
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Using IQueryable with Linq
... user's perspective, is that, when you use IQueryable<T> (with a provider that supports things correctly), you can save a lot of resources.
For example, if you're working against a remote database, with many ORM systems, you have the option of fetching data from a table in two ways, one which...
Conditional HTML Attributes using Razor MVC3
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You didn't hear it from me, the PM for Razor, but in Razor 2 (Web Pages 2 and MVC 4) we'll have conditional attributes built into Razor(as of MVC 4 RC tested successfully), so you can just say things like this...
<input type="...
Can I add jars to maven 2 build classpath without installing them?
...s to this repository. The problem is in most cases this repository will reside on your local machine, so there'll be no way to resolve this dependency on any other machine. Clearly making your artifact depend on a specific machine is not a way to handle things. Otherwise this dependency will have to...
搭建高可用mongodb集群（一）——配置mongodb - 大数据 & AI - 清泛网 - 专...
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输出日志如下，成功！
[initandlisten] MongoDB starting : pid=18285 port=27017 dbpath=/data/mongodbtest/master master=1
#日志显示主节点参数
[initandlisten] options: { dbpath: “/data/mongodbtest/master”, master: true }
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[initandlisten] waiting for connections ...
AngularJS Multiple ng-app within a page
...ername: "Mukesh"
}];
}
);
angular.bootstrap(document.getElementById("App2"), ['namesList']);
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.3/angular.min.js"></script>
<div id="App1" ng-app="shoppingCart" ng-controller="ShoppingCartController">
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Can I Set “android:layout_below” at Runtime Programmatically?
...when creating a RelativeLayout at runtime to set the equivalent of android:layout_below programmatically?
4 Answers
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How to delete a record in Django models?
...re are a couple of ways:
To delete it directly:
SomeModel.objects.filter(id=id).delete()
To delete it from an instance:
instance = SomeModel.objects.get(id=id)
instance.delete()
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