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Finding the index of an item in a list
... itertools.count() (which is pretty much the same approach as enumerate):
from itertools import izip as zip, count # izip for maximum efficiency
[i for i, j in zip(count(), ['foo', 'bar', 'baz']) if j == 'bar']
This is more efficient for larger lists than using enumerate():
$ python -m timeit -s...
Why is semicolon allowed in this python snippet?
...basically Python has a "trailing blank remover". Which by the way is clear from this: stmt_list ::= simple_stmt (";" simple_stmt)* [";"]
– Cucu
Apr 19 '13 at 14:14
...
Doing a cleanup action just before Node.js exits
...f the following code is only needed for test demo
// Prevents the program from closing instantly
process.stdin.resume();
// Emits an uncaught exception when called because module does not exist
function error() {
console.log('error');
var x = require('');
};
// Try each of the following one a...
How to convert String to long in Java?
...efficient since it will reuse if needed the cached instances of Long going from -128 to 127 included.
Returns a Long instance representing the specified long value. If a
new Long instance is not required, this method should generally be
used in preference to the constructor Long(long), as th...
angularjs directive call function specified in attribute and pass an argument to it
...
From my tests using this code in angular 1.2.28, it works well. My tests do not call theMethodToBeCalled with undefined on first load. Neither does the plunker example. This does not appear to be a problem. In other words, ...
Base64 length calculation?
...nded up to a multiple of 4.
The number of unused padding chars resulting from the rounding up to a multiple of 4 will obviously be 0, 1, 2 or 3.
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When do you use varargs in Java?
...e, the list is not modified by the method).
Additionally, I would refrain from using f(Object... args) because its slips towards a programming way with unclear APIs.
In terms of examples, I have used it in DesignGridLayout, where I can add several JComponents in one call:
layout.row().grid(new JL...
Sending “User-agent” using Requests library in Python
...
url = 'SOME URL'
headers = {
'User-Agent': 'My User Agent 1.0',
'From': 'youremail@domain.com' # This is another valid field
}
response = requests.get(url, headers=headers)
If you're using requests v2.12.x and older
Older versions of requests clobbered default headers, so you'd want t...
AngularJS : What is a factory?
...
From what I understand they are all pretty much the same. The major differences are their complexities. Providers are configurable at runtime, factories are a little more robust, and services are the simplest form.
Check out...
How can I merge properties of two JavaScript objects dynamically?
... also has a utility for this: http://api.jquery.com/jQuery.extend/.
Taken from the jQuery documentation:
// Merge options object into settings object
var settings = { validate: false, limit: 5, name: "foo" };
var options = { validate: true, name: "bar" };
jQuery.extend(settings, options);
// Now...