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QuestionReturn negative number as 0 Pin
and180y18-May-20 2:46
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AnswerRe: Return negative number as 0 Pin
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GeneralRe: Return negative number as 0 Pin
and180y18-May-20 3:27
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GeneralRe: Return negative number as 0 Pin
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AnswerRe: Return negative number as 0 Pin
Richard Deeming18-May-20 6:43
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GeneralRe: Return negative number as 0 Pin
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Questiongenerate a mongo bson objectId in angular V7+ Pin
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QuestionHow to format the file containing json objects to json array Pin
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AnswerRe: How to format the file containing json objects to json array Pin
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QuestionMatrix creation using array Pin
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QuestionFrom PHP to Javascript Pin
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AnswerRe: From PHP to Javascript Pin
Andre Oosthuizen26-May-20 2:30
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QuestionJavaScript string printing. Pin
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AnswerMessage Closed Pin
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QuestionMacID,SystemOs, System Version and computername using javascript Pin
rangaraghavan9-May-20 8:46
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AnswerRe: MacID,SystemOs, System Version and computername using javascript Pin
Richard MacCutchan9-May-20 22:41
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Questionadding markers to the map reactjs Pin
dcielak21-Apr-20 12:10
Memberdcielak21-Apr-20 12:10 
I would like to add a marker to the map using the form. Can anyone help me? Installing the map works. I want to display markers after entering x and y, and read this data from the table. I have 2 inputs, one for X and the other for Y after clicking "add" I add this data to the table and I have 2 objects, etc ... but only one marker from state.items is displayed on the map, although I have more coordinates in the table.I know that the componentDidMount () method is only run once and here is the problem.Please Help
state={
items:[{
      "X": 13.6155611,
      "Y": 51.0331258
    },
    ],
}
 
 addItem = (e) => {
    e.preventDefault();
    const newItem = {
      "Y": parseFloat(this.state.X),
      "X": parseFloat(this.state.Y),
    };
    this.setState(prevState => ({
      items: [...prevState.items, newItem]
    }));
 
  }
componentDidMount() {
    const map = new mapboxgl.Map({
      container: this.mapContainer,
      center: [this.state.lng, this.state.lat],
      zoom: this.state.zoom,
    });
for (var i = 0; i < this.state.items.length; i++) {
      var obj = this.state.items[i];
      let myLatlng = new mapboxgl.LngLat(obj.X, obj.Y);
      new mapboxgl.Marker()
        .setLngLat(myLatlng)
        .addTo(map);
    }
 
}
 
 render() {
    return (
        <div ref={el => this.mapContainer = el} />
 
<form onSubmit={this.addItem}>
 <input
              type="number"
              value={this.state.X}
              onChange={e => this.setState({
                X: e.target.value
              })}
            />
            <input
              value={this.state.Y}
              onChange={e => this.setState({
                Y: e.target.value
              })}
            />
</Form>
)}

Questioncan i use the bootstrap table with datatables ? Pin
Ask SNB20-Apr-20 21:19
MemberAsk SNB20-Apr-20 21:19 
SuggestionRe: can i use the bootstrap table with datatables ? Pin
Richard MacCutchan20-Apr-20 23:03
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AnswerRe: can i use the bootstrap table with datatables ? Pin
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AnswerRe: can i use the bootstrap table with datatables ? Pin
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Questionusing javascript geoplugin to geolocalize Pin
Member 1480782320-Apr-20 6:45
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QuestionRe: using javascript geoplugin to geolocalize Pin
Richard MacCutchan20-Apr-20 6:57
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AnswerRe: using javascript geoplugin to geolocalize Pin
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