How to remove duplicates from arrays with complex structures

 [
    [
        {"title": "11111111111", "field": "", "colspan": 2, "rowspan": "1"},
        {"title": "11111111111", "field": "", "colspan": 2, "rowspan": "1"},
        {"title": "22222222", "field": "", "colspan": "4", "rowspan": "1"},
        {"title": "22222222", "field": "", "colspan": "4", "rowspan": "1"},
        {"title": "22222222", "field": "", "colspan": "4", "rowspan": "1"},
        {"title": "22222222", "field": "", "colspan": "4", "rowspan": "1"}
    ],
    [
        {"title": "3333333333", "field": "", "colspan": "2", "rowspan": "1"},
        {"title": "3333333333", "field": "", "colspan": "2", "rowspan": "1"},
        {"title": " 4444444444", "field": "", "colspan": "3", "rowspan": "1"},
        {"title": " 4444444444", "field": "", "colspan": "3", "rowspan": "1"},
        {"title": " 4444444444", "field": "", "colspan": "3", "rowspan": "1"},
        {"title": "2", "field": "2", "colspan": "1", "rowspan": "3"}
    ],
    [
        {"title": "1", "field": "", "colspan": "1", "rowspan": "2"},
        {"title": "3", "field": "3", "colspan": "1", "rowspan": "2"},
        {"title": "4", "field": "4", "colspan": "1", "rowspan": "2"},
        {"title": "555555555", "field": "", "colspan": "2", "rowspan": "1"},
        {"title": "555555555", "field": "", "colspan": "2", "rowspan": "1"},
        {"title": "2", "field": "2", "colspan": "1", "rowspan": "3"}
    ],
    [
        {"title": "1", "field": "", "colspan": "1", "rowspan": "2"},
        {"title": "3", "field": "3", "colspan": "1", "rowspan": "2"},
        {"title": "4", "field": "4", "colspan": "1", "rowspan": "2"},
        {"title": "5", "field": "5", "colspan": "1", "rowspan": "1"},
        {"title": "6", "field": "6", "colspan": "1", "rowspan": "1"},
        {"title": "2", "field": "2", "colspan": "1", "rowspan": "3"}
    ]
]

the result is going to be like this 

[
    [
        {"title": "11111111111", "field": "", "colspan": "3", "rowspan": "1"},
        {"title": "22222222", "field": "", "colspan": "4", "rowspan": "1"}
    ],
    [
        {"title": "1", "field": "1", "colspan": "1", "rowspan": "3"},
        {"title": "3333333333", "field": "", "colspan": "2", "rowspan": "1"},
        {"title": " 4444444444", "field": "", "colspan": "3", "rowspan": "1"},
        {"title": "2", "field": "2", "colspan": "1", "rowspan": "3"}
    ],
    [
        {"title": "1", "field": "", "colspan": "1", "rowspan": "2"},
        {"title": "3", "field": "3", "colspan": "1", "rowspan": "2"},
        {"title": "4", "field": "4", "colspan": "1", "rowspan": "2"},
        {"title": "555555555", "field": "", "colspan": "2", "rowspan": "1"}
    ],
    [
        {"title": "5", "field": "5", "colspan": "1", "rowspan": "1"},
        {"title": "6", "field": "6", "colspan": "1", "rowspan": "1"}
    ]
]
Javascript
Sep.09,2021 
arr.map(items => {
  var result = []
  items.forEach(item => {
    if (!result.find(_item => JSON.stringify(item) === JSON.stringify(_item))) {
      result.push(item)
    }
  })
  return result
})
< H2 > define class < / H2 >

related fields

  • title
  • field
  • colspan
  • rowspan

override the equals method
make use of set storage in java

< H2 > Code < / H2 > 
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;

public class C {
    private String title;
    private String field;
    private String colspan;
    private String rowspan;

    public static void main(String[] args) {

        C c0 = new C("111", "", "", "");
        C c1 = new C("111", "", "", "");
        C c2 = new C("222", "", "", "");
        C c3 = new C("222", "", "", "");

        Set s = new HashSet();
        s.add(c0);
        s.add(c1);
        s.add(c2);
        s.add(c3);

        s.forEach(
                sa ->
                        System.out.println(sa)
        );

    }


    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        C c = (C) o;
        return Objects.equals(title, c.title) &&
                Objects.equals(field, c.field) &&
                Objects.equals(colspan, c.colspan) &&
                Objects.equals(rowspan, c.rowspan);
    }

    @Override
    public int hashCode() {
        return Objects.hash(title, field, colspan, rowspan);
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getField() {
        return field;
    }

    public void setField(String field) {
        this.field = field;
    }

    public String getColspan() {
        return colspan;
    }

    public void setColspan(String colspan) {
        this.colspan = colspan;
    }

    public String getRowspan() {
        return rowspan;
    }

    public void setRowspan(String rowspan) {
        this.rowspan = rowspan;
    }

    public C(String title, String field, String colspan, String rowspan) {
        this.title = title;
        this.field = field;
        this.colspan = colspan;
        this.rowspan = rowspan;
    }

    @Override
    public String toString() {
        return "C{" +
                "title="" + title + "\'' +
                ", field='" + field + '\'' +
                ", colspan='" + colspan + '\'' +
                ", rowspan='" + rowspan + '\'' +
                '}';
    }
}
< H2 > results < / H2 > 
C{title="111", field='', colspan='', rowspan=''}
C{title="222", field='', colspan='', rowspan=''}
true

Previous: Turn the page to save the selected check box

Next: How the react-router4 outer route obtains the path of the match of the child route

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
© 2021 CodesHelper
Advertising Contact us About us
Menu