How to search for words with javascript?

Question

Hi. I need to take the responseTxt I received from a page and search for elements in it. The elements I need to display are those coming from a tag called "name name".

Example:

In the file there are some lines of the type:

string(numero) = "nodo=""nome"

I need to find every place it’s written "nodo=" and pick up every word followed by it. In case, if 3 occurrences of "nodo=" and each has a word (e.g., one has stone, another paper and another scissors), I have to take these 3 occurrences of nodo= and take the words of each and print them on the screen.

Answer 1

Hi, you can find a word using the index method');

The method will return the index of the searched word, in case, I believe it will be something like this:

var busca = "nodo=";
var indexBusca = seuRetorno.indexOf(busca);

To test if found just check the returned value, in case if it is different from -1 is that the word was located.

if (indexBusca != -1) {
    // seu código
}

Hugs.

Answer 2

You can use a regexp to do this:

Example:

I put in the middle of the text two expressions in the format you indicated to exemplify:

• [1]=> string(24) "<nodo name="background">" [1243]=> string(24) "<nodo name="xpto">"

• the result will be: ["background","xpto"]

var text = 'array(173) { [0]=> string(10) "<document>" [1]=> string(24) "<nodo name="background">" [1243]=> string(24) "<nodo name="xpto">" [2]=> string(10) "<id>1</id>" [3]=> string(34) "<ocorrencia>0.3115942</ocorrencia>" [4]=> string(23) "<relacoes name="image">" [5]=> string(23) "<conexoes>48</conexoes>" [6]=> string(11) "</relacoes>" [7]=>';

var items = text.split(/nodo name="([^"]*)"/g);
var count = items.length;
var result = [];
for (var i = 1; i < count; i += 2)
    result.push(items[i]);

document.getElementById("output").innerHTML = JSON.stringify(result)

<div id="output"></div>

It’s not the most performative form in the world, but it’s the easiest way to do it for me.

Answer 3

@Lucianozancan, based on his last example, I believe that Responsetext is a serialized XML document in an unconventional way.

In this case the interresante is to convert the Responsetext to an XML document and then work with the XML document:

Once we have the XML document, then we can search all tags nomes and retrieve the propriedade name of the same.

var responseText = '\
array(9) {\n\
    [0]=> string(10) "<document>"\n\
    [1]=> string(24) "<nodo name="background">"\n\
    [2]=> string(10) "<id>1</id>"\n\
    [3]=> string(34) "<ocorrencia>0.3115942</ocorrencia>"\n\
    [4]=> string(23) "<relacoes name="image">"\n\
    [5]=> string(23) "<conexoes>48</conexoes>"\n\
    [6]=> string(11) "</relacoes>"\n\
    [7]=> string(11) "</nodo>"\n\
    [8]=> string(11) "</document>"\n\
}\
';

var conteudoText = responseText.split("\n");
var conteudoXML =  [];
for (var indice in conteudoText) {    
    var text = conteudoText[indice];
    var indice = text.indexOf('"');
    if (indice >= 0) {
        var xml = text.substring(indice + 1, text.length - 1);
        conteudoXML.push(xml);
    }
}

var documentXML = new DOMParser().parseFromString(conteudoXML.join("\n"),"text/xml");

var nodos = documentXML.getElementsByTagName("nodo");
for (var indice = 0; indice < nodos.length; indice++) {
    var nodo = nodos[indice];
    console.log(nodo.getAttribute("name"));
}

EDIT: The solutions below were attempts to answer when the author of the question had not given enough data, I will keep them interesting.

If you want to work with plain text, you can find the occurrence of the text "Node name=" and then retrieve the next value that is in quotes.

var responseText  = '\
String (46)=> "name=""nome""/string" \
String (58)=> "nodo name=""documento""/html" \
String (35)=> "idade""40""qualquercoisa" \
String (43)=> "nodo name=""hoje""algoaqui" \
';

function encontrarValores(string, chave, separador, delimitador){
    var indice = string.indexOf(chave, 0);
    var valores = [];

    do {        
        
        var iniIndice = indice + chave.length + separador.length + delimitador.length;
        var fimIndice = string.indexOf(delimitador, iniIndice);
        var valor = string.substring(iniIndice, fimIndice);        
        valores.push(valor);
        indice = string.indexOf(chave, indice + 1);
      
    } while (indice >= 0);
    return valores;
}

var valores = encontrarValores(responseText, 'nodo name', '=', '""')
console.log(valores);

But if you were working with HTML, you could simply do the following:

var responseText  = '\
    <div nodo="externa">\
        <div nodo="interna 1">Interna 1</div>\
        <div nodo="interna 2">Interna 2</div>\
        <div nodo="interna 3">Interna 3</div>\
    </div">\
';

var container = document.createElement("div");
container.innerHTML = responseText;


var elements = container.querySelectorAll("[nodo]");
for (var indice in elements) {
    var element = elements[indice];
    if (element.nodeType == 1) {
        console.log(element.getAttribute("nodo"));
    }
}