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Populating associative arrays


Populating associative arrays

By : user2955874
Date : November 22 2020, 10:48 AM
seems to work fine This has nothing to do with your text editor. It has to do with your PHP versions. Your development environment is running PHP 5.4+ and your production environment is running PHP 5.3 or older which does not support short array syntax (i.e. []) which was introduced in PHP 5.4.
So
code :
$data[$key][$val] = [];
$data[$key][$val] = array();


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Merge multiple associative arrays to a single array of associative arrays

Merge multiple associative arrays to a single array of associative arrays


By : Namik Kaya
Date : March 29 2020, 07:55 AM
I wish this helpful for you I have 4 associative arrays as per below: , I believe this is your array
code :
$ids = array('0' => '7','1' => '8','2' => '9');
$names = array('0' => 'Name 1','1' => 'Name 2','2' => 'another name');
$marks = array('0' => '8','1' => '5','2' => '8');
$grade = array('0' => '4','1' => '2.5','2' => '4');

#New Keys
$keys = array("id","name","marks","grade");
$final = array();
$mi = new MultipleIterator();
$mi->attachIterator(new ArrayIterator($ids));
$mi->attachIterator(new ArrayIterator($names));
$mi->attachIterator(new ArrayIterator($marks));
$mi->attachIterator(new ArrayIterator($grade));

foreach ( $mi as $value ) {
    $final[] = array_combine($keys, $value);
}
var_dump($final);
$final = array();
foreach ( array_map(null, $ids, $names, $marks, $grade) as $key => $value ) {
    $final[] = array_combine($keys, $value);
}
var_dump($final);
array
  0 => 
    array
      'id' => string '7' (length=1)
      'name' => string 'Name 1' (length=6)
      'marks' => string '8' (length=1)
      'grade' => string '4' (length=1)
  1 => 
    array
      'id' => string '8' (length=1)
      'name' => string 'Name 2' (length=6)
      'marks' => string '5' (length=1)
      'grade' => string '2.5' (length=3)
  2 => 
    array
      'id' => string '9' (length=1)
      'name' => string 'another name' (length=12)
      'marks' => string '8' (length=1)
      'grade' => string '4' (length=1)
Converting a non-associative list of arrays to an associative array of arrays

Converting a non-associative list of arrays to an associative array of arrays


By : Epicurus
Date : March 29 2020, 07:55 AM
should help you out A simple loop would do, but that's too boring to post an answer for, so here you go:
code :
$array = array_combine(array_map(function (array $row) { return $row['id']; }, $array),
                       $array);
$array = array_combine(F\pluck($array, 'id'), $array);
Populating a JComboBox dynamically without using associative arrays

Populating a JComboBox dynamically without using associative arrays


By : Tony Nguyen
Date : March 29 2020, 07:55 AM
wish help you to fix your issue I would create a Map keyed to the id attribute, which contains a ComboBoxModel of all the child elements.
When the select item of the first combo box changes, I would simple look up the value in the Map and set the second combo box's model to the retrieved value
code :
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.HashMap;
import java.util.Map;
import javax.swing.ComboBoxModel;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class SwitchComboBoxModels {

    public static void main(String[] args) {
        new SwitchComboBoxModels();
    }

    public SwitchComboBoxModels() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setLayout(new BorderLayout());
                frame.add(new TestPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class TestPane extends JPanel {

        private Map<String, ComboBoxModel> models;
        private JComboBox cbMain;
        private JComboBox cbSub;

        public TestPane() {
            models = new HashMap<>(25);
            models.put("Kitchen", createComboBoxModel("espresso_machine",
                    "coffee_machine",
                    "coffee_pot",
                    "kettle",
                    "toaster",
                    "microwave",
                    "oven",
                    "frying_pan",
                    "stand_mixer",
                    "extrator_fan",
                    "tv",
                    "compact_flurescent",
                    "flurescent_tube",
                    "dishwasher",
                    "freezer",
                    "blender",
                    "can_opener",
                    "cooking_range",
                    "popcorn_popper"));
            models.put("Laundry", createComboBoxModel("washing_machine",
                    "clothes_dryer",
                    "vacuum_handler",
                    "compact_fluorescent",
                    "iron"));

            ComboBoxModel mainModel = createComboBoxModel("Kitchen", "Laundry");

            cbMain = new JComboBox();
            cbSub = new JComboBox();
            cbMain.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    cbSub.setModel(models.get((String) cbMain.getSelectedItem()));
                }
            });
            cbMain.setModel(mainModel);
            cbSub.setModel(models.get((String) cbMain.getSelectedItem()));

            setLayout(new GridBagLayout());
            GridBagConstraints gbc = new GridBagConstraints();
            gbc.gridwidth = GridBagConstraints.REMAINDER;
            add(cbMain, gbc);
            add(cbSub, gbc);

        }

        protected ComboBoxModel createComboBoxModel(String... values) {

            return new DefaultComboBoxModel(values);

        }

        @Override
        public Dimension getPreferredSize() {
            return new Dimension(200, 200);
        }

        @Override
        protected void paintComponent(Graphics g) {
            super.paintComponent(g);
            Graphics2D g2d = (Graphics2D) g.create();
            g2d.dispose();
        }
    }
}
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.util.Map;
import javax.swing.ComboBoxModel;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

public class SwitchComboBoxModels {

    public static void main(String[] args) {
        new SwitchComboBoxModels();
    }

    public SwitchComboBoxModels() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setLayout(new BorderLayout());
                frame.add(new TestPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class TestPane extends JPanel {

        private Document xmlDoc;
        private JComboBox cbMain;
        private JComboBox cbSub;
        private XPathFactory xFactory;
        private XPath xPath;

        public TestPane() {

            try {

                readModel();
                ComboBoxModel mainModel = createComboBoxModelByID(find("/components/house[@id]"));

                cbMain = new JComboBox();
                cbSub = new JComboBox();
                cbMain.addActionListener(new ActionListener() {
                    @Override
                    public void actionPerformed(ActionEvent e) {
                        updateSubModel();
                    }
                });
                cbMain.setModel(mainModel);
                updateSubModel();

                setLayout(new GridBagLayout());
                GridBagConstraints gbc = new GridBagConstraints();
                gbc.gridwidth = GridBagConstraints.REMAINDER;
                add(cbMain, gbc);
                add(cbSub, gbc);

            } catch (XPathExpressionException | ParserConfigurationException | SAXException | IOException exp) {
                exp.printStackTrace();
            }

        }

        protected void updateSubModel() {
            try {
                String key = (String) cbMain.getSelectedItem();
                Node parent = findFirst("/components/house[@id='" + key + "']");
                ComboBoxModel subModel = createComboBoxModel(parent.getChildNodes());
                cbSub.setModel(subModel);
            } catch (XPathExpressionException exp) {
                exp.printStackTrace();
            }
        }

        protected void readModel() throws ParserConfigurationException, SAXException, IOException {
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            xmlDoc = factory.newDocumentBuilder().parse(getClass().getResourceAsStream("/Model.xml"));
        }

        protected NodeList find(String xPathQuery) throws XPathExpressionException {
            XPathExpression xExpress = getXPath().compile(xPathQuery);
            return (NodeList) xExpress.evaluate(xmlDoc.getDocumentElement(), XPathConstants.NODESET);
        }

        protected Node findFirst(String xPathQuery) throws XPathExpressionException {
            XPathExpression xExpress = getXPath().compile(xPathQuery);
            return (Node) xExpress.evaluate(xmlDoc.getDocumentElement(), XPathConstants.NODE);
        }

        public XPath getXPath() {
            if (xPath == null) {
                xPath = getXPathFactory().newXPath();
            }
            return xPath;
        }

        protected XPathFactory getXPathFactory() {

            if (xFactory == null) {

                xFactory = XPathFactory.newInstance();

            }

            return xFactory;

        }

        public String getAttributeValue(Node nNode, String sAttributeName) {
            Node nAtt = nNode.getAttributes().getNamedItem(sAttributeName);
            return nAtt == null ? null : nAtt.getNodeValue();
        }

        protected ComboBoxModel createComboBoxModelByID(NodeList nodeList) {

            DefaultComboBoxModel model = new DefaultComboBoxModel();
            for (int index = 0; index < nodeList.getLength(); index++) {
                Node node = nodeList.item(index);
                model.addElement(getAttributeValue(node, "id"));
            }

            return model;

        }

        protected ComboBoxModel createComboBoxModel(NodeList nodeList) {

            DefaultComboBoxModel model = new DefaultComboBoxModel();
            for (int index = 0; index < nodeList.getLength(); index++) {
                Node node = nodeList.item(index);
                if (node.getNodeType() == 1) {
                    model.addElement(node.getNodeName());
                }
            }

            return model;

        }

        @Override
        public Dimension getPreferredSize() {
            return new Dimension(200, 200);
        }

        @Override
        protected void paintComponent(Graphics g) {
            super.paintComponent(g);
            Graphics2D g2d = (Graphics2D) g.create();
            g2d.dispose();
        }
    }
}
Put two different associative arrays inside one associative array as an array with two associative arrays in javascript

Put two different associative arrays inside one associative array as an array with two associative arrays in javascript


By : user1988556
Date : March 29 2020, 07:55 AM
This might help you I Want to join two arrays into one array containing two different arrays First Array. I do not mean a simple array but this time around a more complex array with field having the same values on both sides of the arrays.
code :
const arr1 = [/\*values\*/];

const arr2 = [/\*values\*/];
const $users = arr1.concat(arr2); //[firstValues, secondValues]
const $users = [arr1, arr2]; //[[firstValues], [secondValues]]
How to re-sort an indexed array of associative arrays, based on the values in the associative arrays?

How to re-sort an indexed array of associative arrays, based on the values in the associative arrays?


By : user3053419
Date : March 29 2020, 07:55 AM
will be helpful for those in need If you have Bash 4.3 or newer, you can use namerefs for this, as follows:
code :
sort_by() {
    local arr field sort_params elem
    declare -n arr=$1
    field=$2

    # Build array with sort parameters
    [[ $3 == 'desc' ]] && sort_params+=('-r')
    [[ $field == 'age' ]] && sort_params+=('-n')

    # Schwartzian transform
    for elem in "${arr[@]}"; do
        declare -n ref=$elem
        printf '%s\t%s\n' "${ref["$field"]}" "$elem"
    done | sort "${sort_params[@]}" | cut -f2
}

declare -A assoc1=([name]=aaa [age]=20)
declare -A assoc2=([name]=bbb [age]=40)
declare -A assoc3=([name]=ccc [age]=25)
indexed_array=(assoc1 assoc2 assoc3)

readarray -t byage < <(sort_by indexed_array age desc)
declare -p byage

readarray -t byname < <(sort_by indexed_array name asc)
declare -p byname
sort_by ARRAYNAME FIELD SORTORDER
declare -n arr=$1
declare -n ref=$elem
20      assoc1
40      assoc2
25      assoc3
declare -a byage=([0]="assoc2" [1]="assoc3" [2]="assoc1")
declare -a byname=([0]="assoc1" [1]="assoc2" [2]="assoc3")
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