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How to output loop.counter in python jinja template?
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The counter variable inside the loop is called loop.index in jinja2.
>>> from jinja2 import Template
>>> s = "{% for element in elements %}{{loop.index}} {% endfor %}"
>>> Template(s).render(elements=["a", "b", "c", "d"])
1 2 3 4
See ...
Clicking the back button twice to exit an activity
...code uses System.currentTimeMillis(); to store the time onBackPressed() is called;
private static final int TIME_INTERVAL = 2000; // # milliseconds, desired time passed between two back presses.
private long mBackPressed;
@Override
public void onBackPressed()
{
if (mBackPressed + TIME_INTERVAL...
What does @: (at symbol colon) mean in a Makefile?
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It can be useful in makefiles that call a lot of external programs, and where you want to use echo a lot to make it look nice, like this one
– dwcoder
Jul 17 '15 at 15:04
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What is the javascript MIME type for the type attribute of a script tag? [duplicate]
... where your using a server side database interface script/program to dynamically generate your javascript code while populating variables within from a database of some kind. The generating code must declare 'Content-type: application/x-javascript' as a header, otherwise the server software - and p...
PendingIntent does not send Intent extras
...city starts RefreshService with a Intent which has a boolean extra called isNextWeek .
3 Answers
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What does “dereferencing” a pointer mean?
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Above, you must have known at compile time that you would need a variable called x, and the code asks the compiler to arrange where it should be stored, ensuring the address will be available via &x.
Dereferencing and accessing a structure data member
In C, if you have a variable that is a po...
RSS Feeds in ASP.NET MVC
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Here is what I recommend:
Create a class called RssResult that
inherits off the abstract base class
ActionResult.
Override the ExecuteResult method.
ExecuteResult has the ControllerContext passed to it by the caller and with this you can get the data and content typ...
Rails update_attributes without save?
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I believe what you are looking for is assign_attributes.
It's basically the same as update_attributes but it doesn't save the record:
class User < ActiveRecord::Base
attr_accessible :name
attr_accessible :name, :is_admin, :as => :admin
end
user = User.new
user.assign_attributes(...
Difference between os.getenv and os.environ.get
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See this related thread. Basically, os.environ is found on import, and os.getenv is a wrapper to os.environ.get, at least in CPython.
EDIT: To respond to a comment, in CPython, os.getenv is basically a shortcut to os.environ.get ; since os.environ is lo...
What is the entry point of swift code execution?
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The entry point in a plain Swift module is the file in the module called main.swift. main.swift is the only file which is allowed to have expressions and statements at the top level (all other Swift files in the module can only contain declarations).
Cocoa Touch uses the @UIApplicationMain...