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SQL - many-to-many table primary key
...er. The surrogate is a waste of space.
You won't need indexes on the individual columns since the table should only ever be used to join the two referenced tables together.
That comment you refer to in the question is not worth the electrons it uses, in my opinion. It sounds like the author thinks...
Call AngularJS from legacy code
...
Interop from outside of angular to angular is same as debugging angular application or integrating with third party library.
For any DOM element you can do this:
angular.element(domElement).scope() to get the current scope for the element
...
How do I get an element to scroll into view, using jQuery?
I have an HTML document with images in a grid format using <ul><li><img... . The browser window has both vertical & horizontal scrolling.
...
Reference list item by index within Django template?
...ave an array in which I'm not sure of the index of my desired value {% for id in article_details.heading.contents.article_ids %} {% if id.type == 'DOI' %} {{ article_details.heading.contents.article_ids.forloop.counter0.value }} {% endif %} {% endfor %}
–...
Rails filtering array of objects by attribute value
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As @Vik's solution is pretty much ideal, I'll just add that in binary cases, you could use a 'partition' function to make things sweet. ruby-doc.org/core-1.9.3/Enumerable.html#method-i-partition
– Vlad
Jun 20 '16 at 21:...
Mongodb Explain for Aggregation framework
...rations
explain:true
db.collection.aggregate([
{ $project : { "Tags._id" : 1 }},
{ $unwind : "$Tags" },
{ $match: {$or: [{"Tags._id":"tag1"},{"Tags._id":"tag2"}]}},
{ $group: {
_id : "$_id",
count: { $sum:1 }
}},
{$sort: {"count":-1}}
],
{
explain:...
Prevent segue in prepareForSegue method?
...nd later:
You have to implement the method
- (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender
In your view controller. You do your validation there, and if it's OK then return YES; if it's not then return NO; and the prepareForSegue is not called.
Note that this ...
How to remove an item from an array in AngularJS scope?
...ete($index)">Delete</a>
Controller:
$scope.delete = function ( idx ) {
var person_to_delete = $scope.persons[idx];
API.DeletePerson({ id: person_to_delete.id }, function (success) {
$scope.persons.splice(idx, 1);
});
};
...
How can I get zoom functionality for images?
...me as
ImageView. Example:
TouchImageView img = (TouchImageView) findViewById(R.id.img);
If you are using TouchImageView in xml, then you must provide the full package
name, because it is a custom view. Example:
<com.example.touch.TouchImageView
android:id="@+id/img”
android:layout_w...
List of zeros in python [duplicate]
...tertools.repeat and [0] * n will create lists whose elements refer to same id. This is not a problem with immutable objects like integers or strings but if you try to create list of mutable objects like a list of lists ([[]] * n) then all the elements will refer to the same object.
a = [[]] * 10
a...