variable-length Questions
4
Solved
I have a dataset that looks like below. That is the first item is the user id followed by the set of items which is clicked by the user.
0 24104 27359 6684
0 24104 27359
1 16742 31529 31485
1 167...
Treed asked 7/3, 2019 at 10:8
5
Go's builtin len() function returns a signed int. Why wasn't a uint used instead?
Is it ever possible for len() to return something negative?
As far as I can tell, the answer is no:
Arrays: "The...
Ell asked 22/8, 2016 at 21:22
5
Solved
I am currently working on this problem as a personal project.
Basically:
Given an array of elements, e.g. E = {1,2,a,b} and
Given a number, K, e.g. K = 2
I want to return all Combinations of E...
Zane asked 2/7, 2015 at 4:16
6
Solved
>>> n = [1,2,3,4]
>>> filter(lambda x:x>3,n)
<filter object at 0x0000000002FDBBA8>
>>> len(filter(lambda x:x>3,n))
Traceback (most recent call last):
File ...
Tepid asked 4/10, 2013 at 13:15
10
Solved
I haven't used C very much in the last few years. When I read this question today I came across some C syntax which I wasn't familiar with.
Apparently in C99 the following syntax is valid:
void f...
Convince asked 11/12, 2009 at 10:15
2
Solved
Background: In traditional Reverse Polish Notation, all operators must have fixed lengths, which allows RPN to be easily evaluated and manipulated by code because every token, expression, and subex...
Occupy asked 21/12, 2020 at 21:10
11
Is this the best way to make a variable sized struct in C++? I don't want to use vector because the length doesn't change after initialization.
struct Packet
{
unsigned int bytelength;
unsigned ...
Cyclonite asked 27/3, 2009 at 3:48
4
I am trying to do some vanilla pattern recognition with an LSTM using Keras to predict the next element in a sequence.
My data look like this:
where the label of the training sequence is the la...
Indent asked 4/7, 2016 at 16:30
2
Solved
I have a problem with Python 3. I got Python 2.7 code and at the moment I am trying to update it. I get the error:
TypeError: object of type 'map' has no len()
at this part:
str(len(seed_cand...
Discerning asked 2/5, 2016 at 12:48
11
Solved
I'm little bit confused when do I really need to use that length-1. I know that is when we don't want to have out of bound error. For instance I wrote this simple array:
int [] oldArray = {1, 5, ...
Nucleon asked 21/10, 2013 at 3:49
3
Solved
I want to make a variable length array in Javascript.
Is this possible. A quick google search for "Javascript variable length array" doesn't seem to yield anything, which would be surprising if it...
Graffito asked 24/3, 2010 at 2:37
11
Solved
I need to find out whether a name starts with any of a list's prefixes and then remove it, like:
if name[:2] in ["i_", "c_", "m_", "l_", "d_", "t_", "e_", "b_"]:
name = name[2:]
The above only ...
Marchant asked 24/9, 2011 at 15:29
3
If I use len(np.array([[2,3,1,0], [2,3,1,0], [3,2,1,1]])), I get back 3.
Why is there no argument for len() about which axis I want the length of in multidimensional arrays? This is alarmin...
Lecythus asked 28/3, 2017 at 23:43
5
Solved
I would like to use a multidimensional array to store a grid of data. However, I have not found a simple way to find the length of the 2nd part of the array. For example:
boolean[][] array = new b...
Hindermost asked 19/9, 2012 at 21:3
4
I want to do some exercise about va_list. This is my code.
int myscanf( char* fmt, ... ) {
va_list ap;
va_start ( ap, fmt );
vfscanf ( stdin, fmt, ap );
va_end ( ap );
}
int main() {
int a, ...
Magdala asked 22/7, 2016 at 11:57
4
Solved
I have read in a large data file into R using the following command
data <- as.data.set(spss.system.file(paste(path, file, sep = '/')))
The data set contains columns which should not belong, ...
Samford asked 16/4, 2013 at 2:25
6
Solved
Why doesn't C allow a function with variable length argument list such as:
void f(...)
{
// do something...
}
Mcgovern asked 4/7, 2011 at 10:49
2
Solved
So, this may be a simple question but I'm having some trouble finding the answer anywhere.
Take for example I have a simple program where I want to divide a by b like so:
def main():
a = 1234567...
Waterbuck asked 31/5, 2014 at 13:9
3
Solved
I have a lot of cases when I iterate over a vector in MATLAB,
so I do this :
len = length(vector)
for i=1:len
do_something();
end
But this is just an intuition that says "prevent calling the l...
Decigram asked 15/5, 2014 at 12:5
1
Many processors have instructions which are of uniform format and width such as the ARM where all instructions are 32-bit long. other processors have instructions in multiple widths of say 2, 3, or...
Girth asked 31/1, 2014 at 13:36
2
Solved
With MyISAM having variable length columns (varchar, blob) on the table really slowed queries so that I encountered advices on the net to move varchar columns into separate table.
Is that still an...
Forbore asked 27/4, 2011 at 19:9
1
Solved
The best advice I found for editing a variable-length list of items was written for ASP.Net MVC 2 in 2008.
http://blog.stevensanderson.com/2008/12/22/editing-a-variable-length-list-of-items-in-asp...
Meleager asked 11/6, 2012 at 4:18
2
Solved
How do you go about defining a two-dimensional MxN array in Cobol of which both M and N are of variable length?
Here's the message I get in Net Express when attempting to have a variable array ins...
Cowskin asked 25/1, 2010 at 18:8
0
Cross posted: Need a good overview for Succinct Data Structure algorithms
Since I knew about Succinct Data Structures I'm in a desperate need of a good overview of most recent development...
Sunward asked 30/4, 2012 at 17:33
3
Solved
My tuple looks something like this(for a particular set of generated value)
tTrains = [ (3, ), (1, 3), (6, 8), (4, 6, 8, 9), (2, 4) ]
Now, what I need to find is the length of longest tuple insi...
Veliz asked 7/4, 2012 at 21:11
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