Rearranging the order of a sequence such that the final order is a mirror image of the original.
Rearranging the order of a sequence such that the final order is a mirror image of the original.
Questions tagged [reverse]
3773 questions
22
votes
11 answers
Value of the last element of a list
how to get the value of the last element of a List? I've noted that List.hd (or .Head) return an item, while List.tl (or .Tail) returns a List.
Is rev the List and get the hd the only way around? Thanks.
pistacchio
- 56,889
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22
votes
10 answers
How can I get the reverse url for a Django Flatpages template
How can I get the reverse url for a Django Flatpages template
Travis
- 245
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21
votes
8 answers
Reverse Array Order
I am trying to reverse the order of an Array in java.
What is the most efficient way to do so in O(n) with the least amount of memory used.
No need to answer with code, pseudo code will be fine.
Here is my thought process:
create a new temp array…
marcoo
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21
votes
2 answers
How to iterate Lua table from end?
How do I iterate a simple Lua table, that is a sequence, from end?
Example of wanted behavior:
local mytable = {'a', 'b', 'c'}
for i, value in reversedipairs(mytable) do
print(i .. ": " .. value)
end
should output
3: c
2: b
1: a
How to…
Franz Wexler
- 1,112
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21
votes
6 answers
Array Reverse is not working for me ...
Consider the following code (React JS code):
poll() {
var self = this;
var url = "//" + location.hostname + "/api/v1/eve/history/historical-data/" + this.state.itemId + '/' + this.state.regionId + '/40';
$.get(url,…
TheWebs
- 12,470
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21
votes
7 answers
Reverse a Python string without omitting start and end slice
How do you reverse a Python string without omitting the start and end slice arguments?
word = "hello"
reversed_word = word[::-1]
I understand that this works, but how would I get the result by specifying the start and end indexes?
word =…
Ogen
- 6,499
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21
votes
4 answers
reversing z-index based from page render order
Example Markup:
Trigger
This is some content
Trigger
This is some content
20
votes
5 answers
How to generate random strings that match a given regexp?
Duplicate:
Random string that matches a regexp
No, it isn't. I'm looking for an easy and universal method, one that I could actually implement. That's far more difficult than randomly generating passwords.
I want to create an application that…
Michał Tatarynowicz
- 1,294
- 2
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20
votes
2 answers
nginx server_name inside stream block possible?
Current setup as follows:
stream {
server {
listen 9987 udp;
server_name subdomain.EXAMPLE.com; # this line is resulting in an error
proxy_pass localhost:9987;
proxy_timeout 1s;
proxy_responses 1;
…
Emmmm
- 469
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20
votes
2 answers
Reversing default scale gradient ggplot2
I am newbie, I am trying to desing a heat map. This is my code:
ggplot(gd, aes(Qcountry, Q6_1_Q6d), order = TRUE) +
geom_tile(aes(fill = prob), colour = "white") +
theme_minimal() +
labs( y = "Main reason for mobility", x = "Country") +
…
Tito Sanz
- 1,280
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20
votes
2 answers
RecyclerView scrolling on insert
I am trying to use RecyclerView to create a chat application. I am using a LinearLayoutManager with setReverseLayout(true).
When I am scrolled all the way to the bottom (which is the dataset start = newest message) and a new message is inserted…
ehehhh
- 1,066
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20
votes
9 answers
Reverse elements via pipeline
Is there a function that reverses elements passed via pipeline?
E.g.:
PS C:\> 10, 20, 30 | Reverse
30
20
10
dharmatech
- 8,979
- 8
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20
votes
4 answers
list.reverse() is not working
I honestly just don't understand why this is returning None rather than a reversed list:
>>> l = range(10)
>>> print l
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> print l.reverse()
None
Why is this happening? According to the docs, I am doing nothing…
Ryan Saxe
- 17,123
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19
votes
4 answers
glob() — Sort by Name
How can I reverse the sort by filename? Currently it displays all the text files in alphabetical / numerical order, but I'm trying to have it display in descending order instead. Right now, I have...
FrozenTime
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18
votes
1 answer
Is it possible to run a neural network in reverse?
If we have a neural network such as the multilayer perceptron back propagation neural network that uses sigmodial logistic activation functions is it possible to feed the network outputs and have it compute back a set of inputs? Since we can reverse…
A Person
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