multimap | Web view for comparing base raster maps | Map library
kandi X-RAY | multimap Summary
kandi X-RAY | multimap Summary
##Multiple basemap viewer by Nelson Minar . A web view for slippy miles of tiled maps, designed for quickly comparing multiple base layers. Designed to support projects like Mike Migurski's OSM terrain layer, to make it easy to quickly view, bookmark, and compare map views. For a live demo, see The map works like a typical slippy map. Compass, mouse, and touch controls all pan and zoom. Note the URL auto-updates as you pan and zoom; you can copy and paste a link at any time and get the current view. Buttons on the right toggle what base layer is active. You can hide the purple graticules with the button, and you can collapse the buttons themselves by clicking the "Basemaps" title. The code is designed to make it as simple as possible to add extra basemaps. If you want to add a map, simply add an entry to basemaps.js and then modify the openmaps() function in map.js to include it. See the Polymaps docs for more information on how the URL templates work. Installation is as simple as copying all the files to a web directory and serving them statically. No server code is required.
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Trending Discussions on multimap
QUESTION
So I am working on a project which uses C++. I made a multimap and an iterator of the following type-
...ANSWER
Answered 2021-Jun-09 at 20:17When dereferenced, your iterator yields a pair, whose second member is another pair. printf() doesn't know how to print a pair, so you have to pass each first and second member individually to printf().
But, for that 2nd pair, you are trying to use 2 format strings in a single printf() call, which simply will not work. Your format string is just "%lu", which expects an unsigned long as input, but you are giving it a string literal "%d" instead, hence the error, and position_seqsmap_iterator->second gets ignored.
You need to combine the 2 format strings into 1 format string, eg:
QUESTION
I wanted to create a multimap for each of the keys that I put, but I get this error Multimap is abstract; cannot be instantiated. Is there another way to do this?
ANSWER
Answered 2021-May-30 at 03:26MultiMap in Google Guava is an interface. You cannot instantiate an interface.
Choose a concrete implementation of that interface to instantiate.
Guava supplies at least a dozen. And third-parties may also supply implementations (I don’t know of any).
By the way, Eclipse Collections also provides multi-map functionality.
QUESTION
Part of the class with multimap and his parameters
ANSWER
Answered 2021-May-28 at 01:40Comparing two pointer-to-member-functions is harder than might at first appear. They are typically larger than normal pointers and cannot (for example) be cast to a long.
Here is a custom comparator that ought to work. I have to question the validity of doing this (and maybe there are some hidden gotchas), but I guess if you need it you need it.
QUESTION
My assignment is to make a multimap_util template class that helps the using of multimap. My main problem is that the multimap_util class should also work with custom sorted multimaps.
I don't know how to make it work with two different templates.
So with 2 template args like this:
...ANSWER
Answered 2021-May-22 at 14:43Take in count that std::multimap has ever 4 template parameter. But with a default for the third and the fourth template parameter.
It seems to me that the best you can do is emulate the std::multimap signature that is
QUESTION
I want to create a multimap that maps several bitmaps to their specific char. For latin chars there are more bitmaps (because of font size). Also I need to store chinese chars. There are different fonts (called meg5, meg7, _china01). meg-family fonts are used for latin letters and china01 is used for chinese letters. I need to be able to switch between languages. Thats why I thought of storing them all in one multima. For latin letters I need to determine correct font (between meg5 and meg7). Here are my classes:
...ANSWER
Answered 2021-May-11 at 00:57I think you have a possible option if you don't mind adding some helper functions:
QUESTION
#include
using namespace std;
void getValue(multimap &m){
for(auto &mValue : m){
cout<<<" "<<>n;
multimap m;
for(int i=0;i>num;
getline(cin,str);
m.insert(make_pair(num,str));
}
getValue(m);
return 0;
}
ANSWER
Answered 2021-May-11 at 15:23std::map is a different type to std::multimap, although they bear similarities.
The simplest way would to write a similar function:
QUESTION
Suppose I know that a given std::multimap has exactly one element with a given key and value, and I want to delete this element.
I could explicitly write a std::multimap::find to find some element with that key, then walk backwards until I reach the first element with a different key, walk forward until I find the element I want, and delete it.
Question: Is there anything in or elsewhere that will do this for me? Or do I have to write my own method?
EDIT: This is not the same question as STL Multimap Remove/Erase Values, which is about removing all elements with a given value.
...ANSWER
Answered 2021-May-10 at 22:41There is no built in way to do anything involving searching by key and value but as NathanOliver says in comments, you can write a helper function on top of multimap::equal_range, e.g.
QUESTION
I am getting these compiler errors:
...ANSWER
Answered 2021-May-05 at 12:36There are two fundamental problems that are preventing you from doing this.
First, a std::multimap doesn't even have an overloaded [] operator. A std::multimap, by definition, can have multiple values for the same key. Therefore, if your multimap has two values for a "name", then which ["name"] do you want? You don't know. Neither does your multimap. Only a map has an overloaded [] operator.
Second, when all is said and done you wind up with a std::variant for a value, and there does not seem to be suitable << overload for a variant and a std::ostream. Fortunately, looks like it's easy to solve this problem, in this case. The main problem is that you cannot use a multimap:
QUESTION
I am trying to iterate through a multimap, which is a private member of my class, in a public member function so I can traverse the multimap and print the elements. I know that if I make the print function below non-const it works, but I cannot fully understand why it doesn't work with the const. I'm assuming that assigning the iterator (my_map.begin()) allows the multimap to be modified but the const modifier won't allow this and thus, the code will not compile.Can anyone give me a clear and more in depth explanation as to why this does not work with the const function? I'm fairly new to using the STL containers and am just trying to gain a higher understanding of their functionality. Thanks for all and any help. (C++ code below) (P.S. Just to be as clear as possible, I am not asking how to iterate through a multimap. Thanks again.)
...ANSWER
Answered 2021-Apr-17 at 20:02If you want to get an iterator in a const function then you can't use iterator, but have to use const_iterator instead. So you would have to change the mit type:
typedef mm::const_iterator mit;
Here it's compiling and running: https://godbolt.org/z/jM4rK6556
Or another approach would be not to force a type and let it infer whatever it wants, by changing line inside print:
auto it = my_map.begin();
Here is running version of that: https://godbolt.org/z/rTv6xqPqq
For the future it would be better if you would include the error you are getting inside the question so others know and it's easier to google. Even reading the error is giving the hint of what is happening:
QUESTION
MultiMap multiMap = hazelcastInstance.getMultiMap("mymap");
multiMap.addLocalEntryListener(new EntryListener() {
@Override
public void entryAdded(EntryEvent event) {
System.out.println("******" + event);
}
@Override
public void entryRemoved(EntryEvent event) {
System.out.println("******" + event);
}
...
});
multiMap.put("1", 1);
multiMap.remove("1", 1);
ANSWER
Answered 2021-Apr-17 at 11:08Currently MultiMap does not support adding local listener with includeValue option, though there is no reason that it should not, see the github issue.
As a workaround, you can cast multimap to AbstractDistributedObject and add the listener directly to the MultiMapService.
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