Mixing
Remove an item from map
1
I create a map in Java such as private Map<Integer, List<entity>> m, how can I remove an item stay in List?
I run loop in Map to m.get(key).size() and remove when the condition is true:if (m.get(key).get(i).getID() = xxx); removed clause m.get(key).remove(i).
java
edited Nov 21 '18 at 7:02
Alex.K.
2,20192835
asked Aug 4 '12 at 8:43
PhúcPhúc
2011310
add a comment |
1
I create a map in Java such as private Map<Integer, List<entity>> m, how can I remove an item stay in List?
I run loop in Map to m.get(key).size() and remove when the condition is true:if (m.get(key).get(i).getID() = xxx); removed clause m.get(key).remove(i).
java
edited Nov 21 '18 at 7:02
Alex.K.
2,20192835
asked Aug 4 '12 at 8:43
PhúcPhúc
2011310
I run loop in Map to m.get(key).size() and remove when the condition is true: if (m.get(key).get(i).getID() = xxx); removed clause m.get(key).remove(i). What's wrong here?
– Phúc
Aug 4 '12 at 9:32
@Phúc It seems feasible to me. Does it throw exception or what? Also check this question for safe removing from list.
– Nikita Beloglazov
Aug 4 '12 at 9:44
I have two table in database with 1-n relationship, table have relationship 1 i fill into combobox. And it do filter data of datatable which was loaded from the List<entity>, the table have relationship n. I did action but the datatable did not update although i used update="@this" or update "@form", and i do same for process attribute in <p:commandButton>.
– Phúc
Aug 4 '12 at 11:22
The item in List<entity> was removed successfully but it dose not refresh datatable. Pls someone help me!
– Phúc
Aug 4 '12 at 12:01
add a comment |
1
1
1
I create a map in Java such as private Map<Integer, List<entity>> m, how can I remove an item stay in List?
I run loop in Map to m.get(key).size() and remove when the condition is true:if (m.get(key).get(i).getID() = xxx); removed clause m.get(key).remove(i).
java
edited Nov 21 '18 at 7:02
Alex.K.
2,20192835
asked Aug 4 '12 at 8:43
PhúcPhúc
2011310
I create a map in Java such as private Map<Integer, List<entity>> m, how can I remove an item stay in List?
I run loop in Map to m.get(key).size() and remove when the condition is true:if (m.get(key).get(i).getID() = xxx); removed clause m.get(key).remove(i).
java
java
edited Nov 21 '18 at 7:02
Alex.K.
2,20192835
asked Aug 4 '12 at 8:43
PhúcPhúc
2011310
edited Nov 21 '18 at 7:02
Alex.K.
2,20192835
asked Aug 4 '12 at 8:43
PhúcPhúc
2011310
edited Nov 21 '18 at 7:02
Alex.K.
2,20192835
edited Nov 21 '18 at 7:02
Alex.K.
2,20192835
edited Nov 21 '18 at 7:02
Alex.K.
2,20192835
2,20192835
asked Aug 4 '12 at 8:43
PhúcPhúc
2011310
asked Aug 4 '12 at 8:43
PhúcPhúc
2011310
asked Aug 4 '12 at 8:43
PhúcPhúc
2011310
2011310
I run loop in Map to m.get(key).size() and remove when the condition is true: if (m.get(key).get(i).getID() = xxx); removed clause m.get(key).remove(i). What's wrong here?
– Phúc
Aug 4 '12 at 9:32
@Phúc It seems feasible to me. Does it throw exception or what? Also check this question for safe removing from list.
– Nikita Beloglazov
Aug 4 '12 at 9:44
I have two table in database with 1-n relationship, table have relationship 1 i fill into combobox. And it do filter data of datatable which was loaded from the List<entity>, the table have relationship n. I did action but the datatable did not update although i used update="@this" or update "@form", and i do same for process attribute in <p:commandButton>.
– Phúc
Aug 4 '12 at 11:22
The item in List<entity> was removed successfully but it dose not refresh datatable. Pls someone help me!
– Phúc
Aug 4 '12 at 12:01
add a comment |
I run loop in Map to m.get(key).size() and remove when the condition is true: if (m.get(key).get(i).getID() = xxx); removed clause m.get(key).remove(i). What's wrong here?
– Phúc
Aug 4 '12 at 9:32
@Phúc It seems feasible to me. Does it throw exception or what? Also check this question for safe removing from list.
– Nikita Beloglazov
Aug 4 '12 at 9:44
I have two table in database with 1-n relationship, table have relationship 1 i fill into combobox. And it do filter data of datatable which was loaded from the List<entity>, the table have relationship n. I did action but the datatable did not update although i used update="@this" or update "@form", and i do same for process attribute in <p:commandButton>.
– Phúc
Aug 4 '12 at 11:22
The item in List<entity> was removed successfully but it dose not refresh datatable. Pls someone help me!
– Phúc
Aug 4 '12 at 12:01
I run loop in Map to m.get(key).size() and remove when the condition is true: if (m.get(key).get(i).getID() = xxx); removed clause m.get(key).remove(i). What's wrong here?
– Phúc
Aug 4 '12 at 9:32
I run loop in Map to m.get(key).size() and remove when the condition is true: if (m.get(key).get(i).getID() = xxx); removed clause m.get(key).remove(i). What's wrong here?
– Phúc
Aug 4 '12 at 9:32
@Phúc It seems feasible to me. Does it throw exception or what? Also check this question for safe removing from list.
– Nikita Beloglazov
Aug 4 '12 at 9:44
@Phúc It seems feasible to me. Does it throw exception or what? Also check this question for safe removing from list.
– Nikita Beloglazov
Aug 4 '12 at 9:44
I have two table in database with 1-n relationship, table have relationship 1 i fill into combobox. And it do filter data of datatable which was loaded from the List<entity>, the table have relationship n. I did action but the datatable did not update although i used update="@this" or update "@form", and i do same for process attribute in <p:commandButton>.
– Phúc
Aug 4 '12 at 11:22
I have two table in database with 1-n relationship, table have relationship 1 i fill into combobox. And it do filter data of datatable which was loaded from the List<entity>, the table have relationship n. I did action but the datatable did not update although i used update="@this" or update "@form", and i do same for process attribute in <p:commandButton>.
– Phúc
Aug 4 '12 at 11:22
The item in List<entity> was removed successfully but it dose not refresh datatable. Pls someone help me!
– Phúc
Aug 4 '12 at 12:01
The item in List<entity> was removed successfully but it dose not refresh datatable. Pls someone help me!
– Phúc
Aug 4 '12 at 12:01
add a comment |
1 Answer
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I'd go over the map entries and use the removeIf method to remove the relevant elements from each list:
m.values().forEeach(v -> v.removeIf(i -> i.getId() == 123));
// Just an example, of course ------------------------^
answered Nov 21 '18 at 7:11
MureinikMureinik
182k22134200
add a comment |
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1 Answer
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1 Answer
1
active
oldest
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0
I'd go over the map entries and use the removeIf method to remove the relevant elements from each list:
m.values().forEeach(v -> v.removeIf(i -> i.getId() == 123));
// Just an example, of course ------------------------^
answered Nov 21 '18 at 7:11
MureinikMureinik
182k22134200
add a comment |
0
I'd go over the map entries and use the removeIf method to remove the relevant elements from each list:
m.values().forEeach(v -> v.removeIf(i -> i.getId() == 123));
// Just an example, of course ------------------------^
answered Nov 21 '18 at 7:11
MureinikMureinik
182k22134200
add a comment |
0
0
0
I'd go over the map entries and use the removeIf method to remove the relevant elements from each list:
m.values().forEeach(v -> v.removeIf(i -> i.getId() == 123));
// Just an example, of course ------------------------^
answered Nov 21 '18 at 7:11
MureinikMureinik
182k22134200
I'd go over the map entries and use the removeIf method to remove the relevant elements from each list:
m.values().forEeach(v -> v.removeIf(i -> i.getId() == 123));
// Just an example, of course ------------------------^
answered Nov 21 '18 at 7:11
MureinikMureinik
182k22134200
answered Nov 21 '18 at 7:11
MureinikMureinik
182k22134200
answered Nov 21 '18 at 7:11
MureinikMureinik
182k22134200
answered Nov 21 '18 at 7:11
MureinikMureinik
182k22134200
182k22134200
add a comment |
add a comment |
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I run loop in Map to m.get(key).size() and remove when the condition is true: if (m.get(key).get(i).getID() = xxx); removed clause m.get(key).remove(i). What's wrong here?
– Phúc
Aug 4 '12 at 9:32
@Phúc It seems feasible to me. Does it throw exception or what? Also check this question for safe removing from list.
– Nikita Beloglazov
Aug 4 '12 at 9:44
I have two table in database with 1-n relationship, table have relationship 1 i fill into combobox. And it do filter data of datatable which was loaded from the List<entity>, the table have relationship n. I did action but the datatable did not update although i used update="@this" or update "@form", and i do same for process attribute in <p:commandButton>.
– Phúc
Aug 4 '12 at 11:22
The item in List<entity> was removed successfully but it dose not refresh datatable. Pls someone help me!
– Phúc
Aug 4 '12 at 12:01