Linux: Find all symlinks of a given ‘original’ file? (reverse ‘readlink’)
Using GNU find, this will find the files that are hard linked or symlinked to a file: find -L /dir/to/start -samefile /tmp/orig.file
reverse
Best way to loop over a python string backwards
Try the reversed builtin: for c in reversed(string): print c The reversed() call will make an iterator rather than copying the entire string. PEP 322 details the motivation for reversed() and its advantages over other approaches.
Including a querystring in a django.core.urlresolvers reverse() call
You can’t capture GET parameters in the url confs, so your method is correct. I generally prefer string formatting but it’s the same thing. “%s?next=%s” % (reverse(name), reverse(redirect)) http://docs.djangoproject.com/en/dev/topics/http/urls/#what-the-urlconf-searches-against The URLconf searches against the requested URL, as a normal Python string. This does not include GET or POST parameters, or the domain name.
Printing an array in C++?
Just iterate over the elements. Like this: for (int i = numElements – 1; i >= 0; i–) cout << array[i]; Note: As Maxim Egorushkin pointed out, this could overflow. See his comment below for a better solution.
How to reverse order a vector?
You are almost there; rev does what you need: rev(1:3) # [1] 3 2 1 rev(numeric(0)) # numeric(0) Here’s why: rev.default # function (x) # if (length(x)) x[length(x):1L] else x # <bytecode: 0x0b5c6184> # <environment: namespace:base> In the case of numeric(0), length(x) returns 0. As if requires a logical condition, it coerces length(x) to TRUE … Read more
How do i pass GET parameters using django urlresolvers reverse
GET parameters have nothing to do with the URL as returned by reverse. Just add it on at the end: url = “%s?name=joe” % reverse(viewOne)
c# Trying to reverse a list
Try: NavItems.Reverse(); return NavItems; List<T>.Reverse() is an in-place reverse; it doesn’t return a new list. This does contrast to LINQ, where Reverse() returns the reversed sequence, but when there is a suitable non-extension method it is always selected in preference to an extension method. Plus, in the LINQ case it would have to be: return … Read more
Best way to create a “reversed” list in Python? [duplicate]
newlist = oldlist[::-1] The [::-1] slicing (which my wife Anna likes to call “the Martian smiley”;-) means: slice the whole sequence, with a step of -1, i.e., in reverse. It works for all sequences. Note that this (and the alternatives you mentioned) is equivalent to a “shallow copy”, i.e.: if the items are mutable and … Read more
How to reverse a string in Go?
In Go1 rune is a builtin type. func Reverse(s string) string { runes := []rune(s) for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 { runes[i], runes[j] = runes[j], runes[i] } return string(runes) }
How do I exchange keys with values in a dictionary? [duplicate]
Python 2: res = dict((v,k) for k,v in a.iteritems()) Python 3 (thanks to @erik): res = dict((v,k) for k,v in a.items())