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Rails check if yield :area is defined in content_for
...ering at the layout level based on the actual template has defined content_for(:an__area) , any idea how to get this done?
...
Most efficient method to groupby on an array of objects
...g callback functions to return a sorting criteria
– y_nk
Jul 6 '16 at 16:50
118
Here is one that ...
Mongoose populate after save
...l's populate function to do this: http://mongoosejs.com/docs/api.html#model_Model.populate In the save handler for book, instead of:
book._creator = user;
you'd do something like:
Book.populate(book, {path:"_creator"}, function(err, book) { ... });
Probably too late an answer to help you, but...
How to dynamically create a class?
...rtyType)
{
FieldBuilder fieldBuilder = tb.DefineField("_" + propertyName, propertyType, FieldAttributes.Private);
PropertyBuilder propertyBuilder = tb.DefineProperty(propertyName, PropertyAttributes.HasDefault, propertyType, null);
MethodBuilder getPropMt...
How can I implement a tree in Python?
...s easy to create. For example, a binary tree might be:
class Tree:
def __init__(self):
self.left = None
self.right = None
self.data = None
You can use it like this:
root = Tree()
root.data = "root"
root.left = Tree()
root.left.data = "left"
root.right = Tree()
root.right...
get and set in TypeScript
...etter/setter syntax that is like ActionScript3.
class foo {
private _bar: boolean = false;
get bar(): boolean {
return this._bar;
}
set bar(value: boolean) {
this._bar = value;
}
}
That will produce this JavaScript, using the ECMAScript 5 Object.definePropert...
How to avoid “if” chains?
...the basic flow, e.g. instead of
if (ok)
{
DoSomething();
}
else
{
_log.Error("oops");
return;
}
... you'd use....
if (!ok)
{
_log.Error("oops");
return;
}
DoSomething(); //notice how this is already farther to the left than the example above
When there is a long series of ...
How do I import CSV file into a MySQL table?
...o it:
LOAD DATA LOCAL INFILE
'c:/temp/some-file.csv'
INTO TABLE your_awesome_table
FIELDS TERMINATED BY ','
ENCLOSED BY '"'
LINES TERMINATED BY '\n'
(field_1,field_2 , field_3);
It is very important to include the last line , if you have more than one field i.e normally it skips the last...
How to throw std::exceptions with variable messages?
...atter & operator << (const Type & value)
{
stream_ << value;
return *this;
}
std::string str() const { return stream_.str(); }
operator std::string () const { return stream_.str(); }
enum ConvertToString
{
to_str
};...
What is the pythonic way to avoid default parameters that are empty lists?
...
def my_func(working_list=None):
if working_list is None:
working_list = []
working_list.append("a")
print(working_list)
The docs say you should use None as the default and explicitly test for it in the body ...