I don’t know about cleaner, but there’s another alternative: for (op, code) in zip(s[0::2], s[1::2]): print op, code A no-copy version: from itertools import izip, islice for (op, code) in izip(islice(s, 0, None, 2), islice(s, 1, None, 2)): print op, code
Beware of properties inherited from the object’s prototype (which could happen if you’re including any libraries on your page, such as older versions of Prototype). You can check for this by using the object’s hasOwnProperty() method. This is generally a good idea when using for…in loops: var user = {}; function setUsers(data) { for (var … Read more
Most of the attempts using a union with an array are prone to failure. They stand a decent chance of working as long as you only use int’s, but for other, especially smaller, types, they’re likely to fail fairly frequently because the compiler can (and especially with smaller types often will) add padding between members … Read more
each uses a pointer associated with the hash to keep track of iteration. It does not know that the first while is different from the second while loop, and it keeps the same pointer between them. Most people avoid each for this (and other) reasons, instead opting for keys: for my $key (keys %hash){ say … Read more
A recursive process needs to maintain the state of the caller while the recursive call is in progress. For instance, if you wrote: (define (fact-recurse n) (if (< n 2) 1 (* n (fact-recurse (- n 1))))) the outer call has to remember n and wait for the inner call to return before it can … Read more
The generator is expanded at the time of the function call, as you can easily check: def f(*args): print(args) foo = [‘foo’, ‘bar’, ‘baz’] gen = (f for f in foo) f(*gen) will print (‘foo’, ‘bar’, ‘baz’)
None of the answers actually work. I’ve managed to find the solution myself. This is a bit hackish, but it solve the problem for me: echo off setlocal enableextensions setlocal enabledelayedexpansion set MAX_TRIES=100 set P=%PATH% for /L %%a in (1, 1, %MAX_TRIES%) do ( for /F “delims=;” %%g in (“!P!”) do ( echo %%g set … Read more
There is a mistake. See this line <c:forEach items=”${myList}” var=”element”>. ${} around ‘myList’ was missing. <c:forEach items=”${myList}” var=”element”> <tr> <td>${element.status}</td> <td>${element.requestType}</td> <td>${element.requestedFor}</td> <td>${element.timeSubmitted}</td> </tr> </c:forEach>
There’s nothing wrong with direct, “ad-hoc” solution. It can be clean enough too. Just notice that spiral is built from segments. And you can get next segment from current one rotating it by 90 degrees. And each two rotations, length of segment grows by 1. edit Illustration, those segments numbered … 11 10 7 7 … Read more
Some quick timing runs seem to give the 2nd option using range() a slight edge over enumerate(): timeit a = [f(n) for n, _ in enumerate(mlist)] 10000 loops, best of 3: 118 us per loop timeit a = [f(n) for n in range(len(mlist))] 10000 loops, best of 3: 102 us per loop and just for … Read more