Common Lisp 'remove-if' function.
Common Lisp 'remove-if' function.
It's signature is:
remove-if test sequence &key from-end start end count key => result-sequence
CLHS: remove-if
Questions tagged [remove-if]
201 questions
2
votes
2 answers
lambdas in removeIf
HashSet liczby = new HashSet();
liczby.add(1);
liczby.add(2);
liczby.add(3);
liczby.add(4);
liczby.removeIf ((Integer any) -> { return liczby.contains(3); });
for(Iterator it = liczby.iterator(); it.hasNext();){
…
QWERTY1234567890
- 109
- 1
- 8
2
votes
3 answers
C++ remove_if without iterating through whole vector
I have a vector of pointers, pointing to approx 10MB of packets. In that, from first 2MB, I wanna delete all those that matches my predicate. The problem here is remove_if iterates through the whole vector, even though its not required in my use…
Novajik
- 47
- 6
2
votes
4 answers
Remove items from list according to a list of indexes
I have a list of items like so:
A = [[0 A B],[1 C D],[2 E F],[3 G H],[4 I L],[5 M N],[6 O P],[7 Q R],[8 S T],[9 U Z]]
I then define another list like so:
index = [0,2,6]
My goal is to remove the lists 1, 3 and 7 from A so that the result is:
A =…
Federico Gentile
- 5,650
- 10
- 47
- 102
2
votes
2 answers
How can I remove a spcific html meta tag with php?
I would like to this:
If php found this specific meta tag in the html source,then delete from header:
Szántai Ádám
- 33
- 7
2
votes
3 answers
remove_if on a map trying to pass a const as a non-const - why?
Here's a bit of code which is supposed to filter out the elements of a map which satisfy a predicate, into a new map (MCVE-fied):
#include
#include
#include
using namespace std;
int main() {
…
einpoklum
- 118,144
- 57
- 340
- 684
2
votes
2 answers
remove words of a text file from a map in C++ without loop
I try to make a set to store certain words of a text file. Then I want to remove these words from a map, which I already made up. I have successfully made a set to store these words, but I cannot remove them from the map. Besides, I cannot use a…
Frank
- 91
- 7
2
votes
1 answer
How do delete empty cells of a vector if using remove_if
I am filling a std::vector with some object.
this vector instance as defined in the following line:
std::vector< std::list< pcl::PointXYZRGB>> tab;
I now want to delete the empty cells. I tried like following:
tab.erase(remove_if(tab.begin(),…
lotfishtaine
- 111
- 1
- 3
- 10
2
votes
3 answers
How to remove a customized object using stl remove from container set?
Following is the class and container
class student {
std::string name;
int id;
}
set s; // sorted by id that i have done correctly
class compare {
public:
bool operator()( Student* s1, Student* s2) {
return…
Suri
- 3,287
- 9
- 45
- 75
2
votes
1 answer
Removing separate list of items from another list in Python 3.x
I have a list that contains a lot of tagged bigrams. Some of the bigrams are not tagged correctly so I want to remove them from the master list. One of the words of a bigrams keeps repeating frequently, so I can remove the bigram if it contains an…
Mohammed
- 1,364
- 5
- 16
- 32
2
votes
1 answer
LISP: Removing elements from list already existing in another
Can anybody explain to me why this:
(remove-if #'(lambda (var) (member var (list "x"))) (list "x" "y" "z"))
returns this:
("x" "y" "z")
but this:
(remove-if #'(lambda (var) (member var (list 1))) (list 1 2 4))
returns this:
(2 4)
?
Miguel Noronha
- 31
- 4
2
votes
2 answers
Removing sublists in a list by comparing them with an alist in Common Lisp
This is complicated, and I'm hoping there's a simpler way to do it.
I'm comparing a freshly generated list of "suggested connections" for a social networking site against a "blocked suggestions" list. The first list looks something like this:
((12…
tangopianist
- 149
- 1
- 8
2
votes
2 answers
how to dynamically add/remove multiple divs using jquery
In advance, I apologize if one of the other posts contained my answer. However, I DID review them, but perhaps my naiveté prevented me from completely understanding how to incorporate the posted code into my page. In any case, I would sincerely…
user3059798
- 21
- 1
- 2
2
votes
2 answers
std::remove_if using other class method
I want to use std::remove_if with a predicate that is a member function of a differenct calss.
That is
class B;
class A {
bool invalidB( const B& b ) const; // use members of class A to verify that B is invalid
void someMethod() ;
};
Now,…
Shai
- 111,146
- 38
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- 371
2
votes
3 answers
Iterating over std::vector with lambda does not want to remove with remove_if
I have a small problem with lambda expression while using remove_if on std::vector
I have a following piece of code :
std::remove_if( openList.begin(), openList.end(),
[&](BoardNode& i){
std::cout<< i.getCoordinates() <<…
Patryk
- 22,602
- 44
- 128
- 244
2
votes
1 answer
Is remove_if predicate guaranteed to be called only once per iterator?
I've been reading the latest C++ spec, and I'm unable to figure out whether or not remove_if can be called multiple times for the same element. In particular, I'm looking at std::remove_if being called on deque iterators. So far as I can figure,…
Mahmoud Al-Qudsi
- 28,357
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