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What is “callback hell” and how and why does RX solve it?
...is other question has some examples of Javascript callback hell: How to avoid long nesting of asynchronous functions in Node.js
The problem in Javascript is that the only way to "freeze" a computation and have the "rest of it" execute latter (asynchronously) is to put "the rest of it" inside a call...
How to load external webpage inside WebView
My problem is that the webpage is not loaded inside the webview.
13 Answers
13
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Posting a File and Associated Data to a RESTful WebService preferably as JSON
This is probably going to be a stupid question but I'm having one of those nights. In an application I am developing RESTful API and we want the client to send data as JSON. Part of this application requires the client to upload a file (usually an image) as well as information about the image.
...
Django optional url parameters
...iews.foo),
url(r'^project_config/(?P<product>\w+)/(?P<project_id>\w+)/$', views.foo),
)
Keep in mind that in your view you'll also need to set a default for the optional URL parameter, or you'll get an error:
def foo(request, optional_parameter=''):
# Your code goes here
...
Dynamically adding a form to a Django formset with Ajax
...gt;
</div>
{% endfor %}
<input type="button" value="Add More" id="add_more">
<script>
$('#add_more').click(function() {
cloneMore('div.table:last', 'service');
});
</script>
In a javascript file:
function cloneMore(selector, type) {
var newElement =...
ASP.NET MVC passing an ID in an ActionLink to the controller
I can't see to retrieve an ID I'm sending in a html.ActionLink in my controller, here is what I'm trying to do
5 Answers
...
How do I add a foreign key to an existing SQLite table?
...child ADD CONSTRAINT fk_child_parent
FOREIGN KEY (parent_id)
REFERENCES parent(id);
SQLite doesn't support the ADD CONSTRAINT variant of the ALTER TABLE command (sqlite.org: SQL Features That SQLite Does Not Implement).
Therefore, the only way to add a foreig...
find vs find_by vs where
...its your needs best.
The find method is usually used to retrieve a row by ID:
Model.find(1)
It's worth noting that find will throw an exception if the item is not found by the attribute that you supply. Use where (as described below, which will return an empty array if the attribute is not foun...
Passing variables through handlebars partial
...of html potentially on the same page, but you're doomed if the partial has IDs... the same ID will show up more than once and becomes invalid. It'd be extremely useful if you can pass in arguments to partials when invoking it, to further customize its content.
– Xavier_Ex
...
How to handle anchor hash linking in AngularJS
...call it in your controller, and it will scroll you to any element with the id found in $location.hash()
app.controller('TestCtrl', function($scope, $location, $anchorScroll) {
$scope.scrollTo = function(id) {
$location.hash(id);
$anchorScroll();
}
});
<a ng-click="scrollTo('fo...