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Trying to SSH into an Amazon Ec2 instance - permission error
...key file must not be publicly viewable for SSH to work. Use this
command if needed: chmod 400 mykey.pem
400 protects it by making it read only and only for the owner.
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SQLAlchemy ORDER BY DESCENDING?
...
Just as an FYI, you can also specify those things as column attributes. For instance, I might have done:
.order_by(model.Entry.amount.desc())
This is handy since it avoids an import, and you can use it on other places such as in a relation definition, etc.
...
Mixins vs. Traits
What is the difference between Mixins and Traits?
2 Answers
2
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How to view corresponding SQL query of the Django ORM's queryset?
...logging message
# to its parent (will send if set to True)
},
'django.db': {
# django also has database level logging
},
},
}
Another method in case application is generating html output - django debug toolbar can be used.
...
What does tree-ish mean in Git?
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The Short Answer (TL;DR)
"Tree-ish" is a term that refers to any identifier (as specified in the Git
revisions documentation) that ultimately leads to a (sub)directory
tree (Git refers to directories as "trees" and "tree objects").
In the original poster's case, foo is a directory that he want...
Using LINQ to concatenate strings
...s are executed immediately.
More information - MSDN: Aggregate Queries
If you really want to use Aggregate use variant using StringBuilder proposed in comment by CodeMonkeyKing which would be about the same code as regular String.Join including good performance for large number of objects:
var...
Using Mockito to mock classes with generic parameters
.../interface that would satisfy the generic type that you are wanting to specify. For example, if Foo was an interface, you could create the following interface in your test class.
private interface FooBar extends Foo<Bar>
{
}
In situations where Foo is a non-final class, you could just exte...
Replace a string in shell script using a variable
...
If you want to interpret $replace, you should not use single quotes since they prevent variable substitution.
Try:
echo $LINE | sed -e "s/12345678/\"${replace}\"/g"
assuming you want the quotes put in. If you don't want t...
What's the difference between Thread start() and Runnable run()
...d creation.
R1 r1 = new R1();
R2 r2 = new R2();
r1 and r2 are just two different objects of classes that implement the Runnable interface and thus implement the run() method. When you call r1.run() you are executing it in the current thread.
Second example: Two separate threads.
Thread t1 = ne...
How to render and append sub-views in Backbone.js
...
I have generally seen/used a couple of different solutions:
Solution 1
var OuterView = Backbone.View.extend({
initialize: function() {
this.inner = new InnerView();
},
render: function() {
this.$el.html(template); // or this.$el.empty...