for (final Map.Entry<String, Object> entry : hashmap.entrySet()) { final String key = entry.getKey(); System.out.println(“Key:” + key); Object obj = entry.getValue(); } solved How can I retrieve values and keys from a HashMap in Java 8?
I’m not sure that I really understand your description of what you are doing, but this stands out: this.containers.put(this.currentHashMapKey, tempHashMap); // … tempHashMap.clear(); When you call clear(), you remove all entries from tempHashMap. Since this is the map object that you added as a value in the containers map, you are clearing it there as … Read more
I’m not sure I understand your “job description”, but I think you want this: def find_matches(tuple_of_dicts, key_to_find): return [d for d in tuple_of_dicts if key_to_find in d] So: >>> tuple_of_dicts = ({18: None}, {10: None}, {16: None, 18: None, 5: None, 6: None, 7: None, 10: None}, {16: None}, {7: None}, {10: None}, {18: None}, … Read more
Ideally you should try the steps 2 and 3 and come to SO when you are stuck with an issue and you can’t find an answer. For now, I will give you my approach – Just a pseudocode: for(int i=0;i<arr.length;i++) { Map<Character,Integer> temp = hm; for(Character c : arr[i].toCharArray()) { if(!temp.containsKey(c) or temp[c]<=0) break the … Read more
Your ENUM values on the map seem like another map. Therefore I put it like this Map<Enum, Map<String, Object>> However, question is not clear! Here is one possible solution. import java.util.*; public class Main { public static void main(String[] args) { Map<Enum, Map<String, Object>> map = new HashMap<>(); Map<String, Object> value = new HashMap<>(); value.put(“String1”, … Read more
Either make the information available by using statics (not recommended), use some kind of database (could be as simple as a text file) or pass an Intent along with your Activity. A nice tutorial on adding information to an Intent is found here: http://startandroid.ru/en/lessons/complete-list/241-lesson-28-extras-passing-data-using-intent.html 0 solved How to access a HashMap from another class
A Map is a key-value pair, i.e., a value is associated to a key. Your code can be refactored as follows: Map<String, Object> details = taskManager.getFormDetails(appSessionURI, accessToken); //System.out.println(“Details :” + details); String fileName = (String)details.get(“fileName”); String refGene = (String)details.get(“refgene”); 3 solved Retrieve value in HashMap [closed]
Trying to put a HashMap as a key inside itself is a bad idea. After hm.put(hm,hm), your HashMap contains a key whose hashCode() is hm.hashCode(). hm.hashCode() is a function of the hashCode() of all the Map‘s entries. The hashCode() of an entry is a function of the hashCode() of the key and value (both are … Read more
You could do something like the following: int total = 100; int i = 0; // You should use a more specifc type than Object if you can Map<Integer, Object> m = new HashMap<Integer, Object>(); while (i < total) { Object o = //what you want to put into the HashMap on each iteration m.put(i, … Read more
try this.. HashMap<Integer, List<String>> map = new HashMap<>(); List<String> list = new ArrayList<>(); list.add(“a”); list.add(“b”); list.add(“c”); map.put(1, list); 4 solved how to put values into HashMap [closed]
$SDP_ID2CohortMap = array( $key => $value ); $SDP_ID2CohortMap[$key] = $value; But not both at the same time. 1 solved What is the proper syntax to add a hash key/value pair to an array in PHP? [closed]
According to java doc, Map.keyset() Returns a set view of the keys contained in this map. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. If the map is modified while an iteration over the set is in progress (except through the iterator’s own remove … Read more
Try this HashMap<String, String> param = new HashMap<String, String>(); param.put(“A”, “2”); param.put(“B”, “3”); param.put(“C”, “2”); String[] list = new String[7];// It is better to use List other than an array int i = 0; for (Map.Entry<String, String> entry : param.entrySet()) { int lim=Integer.parseInt(entry.getValue()); for(int j=0;j<lim;j++){ list[i]=entry.getKey()+” “+String.valueOf(j+1); i++; } } If you really want to … Read more
This is how you can iterate over your Map: for (Map.Entry<String, Integer> entry : killstreaks.entrySet()) { String key = entry.getKey(); Integer value = entry.getValue(); // continue here } To get a specific value (Integer) from your Map use: killstreak.get(“yourKey”); Seeing from your comment that you want to increment entries by 1, you can use: killstreaks.put(key, … Read more
You can assume that I’m modifying a field of the object after I add the object to the HashMap. That right there is why. Javadoc says: Note: great care must be exercised if mutable objects are used as map keys. The behavior of a map is not specified if the value of an object is … Read more