how i can find the number of occurrence of word in an sentence in java script

Question

i wrote an java script program that must do the following things : it must take the sentence from the text in the form and then find the number of occurrence of each word in the sentence alphabetically in table as following:

this : 5 times 
the : 2 times .....and so on

but in reality my program do the following and doesn't show the result when search button clicked and if we take the function button-pressed() lonely it works as the following:

this :1
this :2
this:3
this:4
this:5
the:1
the:2....and so on

i want to appear the last values without the redundant values ,so any help please this is my code :

<script type = "text/javascript"><!--
function buttonPressed() {
    var searchForm = document.getElementById( "searchForm" );
    var inputVal = document.getElementById( "inputVal" );
    var arr =inputVal.split(" ");
    var counts = {};
    arr.sort();
    for(var i = 0; i< arr.length; i++) {
        var num = arr[i];
        if(counts[num])
            counts[num]=counts[num]+1 ;
        else
            counts[num]=1;

        document.writeln("<table border = \"4\">" );
        document.writeln( "<caption><h3>Search's Results: <h3/></caption>" );
        document.writeln( "<tr><td>"+arr[i]+" :</td><td>" +counts[num] + "</td></tr></tbody></table>" );
    }
} // end function buttonPressed
// --></script>

<form id = "searchForm" action = "">
<h1>The string to search is:<br /></h1>
<p>Enter Sentence  You Wnt To Find The Occurrence Of Each Word In It :
<input id = "inputVal" type = "text" />
<input name = "search" type = "button" value = "Search" onclick = "buttonPressed()" /><br /></p></form>

score 2 · Answer 1 · answered Oct 23 '13 at 18:04

2

You can also use this:

"mijn naam is niels, niels is mijn naam".split("niels").length - 1
// Will return 2

Which will split on the word, and you will have the number of matches

answered Oct 23 '13 at 18:04

Niels

48,601
4
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Soz, didn't see that. – Niels Oct 23 '13 at 18:29

score 2 · Answer 2 · edited May 23 '17 at 11:50

2

the main problem that you're trying to output during calculation, your document.writeln statements are inside for loop

you need to move them out:

for(var i = 0; i< arr.length; i++) {
    var num = arr[i];
    counts[num] = (counts[num] ? counts[num] : 0) + 1 ;
}

document.writeln("<table border=\"4\">");
document.writeln("<caption><h3>Search's Results: <h3/></caption>");
for (var i in counts) {
    document.writeln("<tr><td>"+i+" :</td><td>"+counts[i]+"</td></tr>");
}
document.writeln("</tbody></table>");

NOTE: please read about htmlencode and document.writeln functions, you're doing wrong output, as you're writing to the end of document, for your particular task is ok, but usually you need to do output into particular place on page, for this you will need to assign innerHTML of some div

edited May 23 '17 at 11:50

Community

1
1

answered Oct 23 '13 at 18:10

Iłya Bursov

23,342
4
33
57

Damnit, you beat me to it XD Have a +1 – Niet the Dark Absol Oct 23 '13 at 18:13
thanks a lot but when i do the function lonely it work perfectly but when i use the form to get the sentence and click on the button there is no thing happened ,please do you have an idea ? – bessan al bessani Oct 23 '13 at 18:54
@bessanalbessani use `var arr = inputVal.value.split(" ");` – Iłya Bursov Oct 23 '13 at 19:39
i have modified the code so that ar inputVal = document.getElementById( "inputVal" ).value; and then use it but it still doesn't work and i don't know where the problem was !!! – bessan al bessani Oct 23 '13 at 20:01
@bessanalbessani then user browser's developer tool to check if there any error in log or debug code – Iłya Bursov Oct 23 '13 at 20:05
mmmm i try the code on other browser(Firefox)but also it doesn't work ! – bessan al bessani Oct 23 '13 at 20:09
i find that the function doesn't save the items after split in the array but i don't know why? ! – bessan al bessani Oct 23 '13 at 20:47
@bessanalbessani what values should be saved? – Iłya Bursov Oct 23 '13 at 22:21

how i can find the number of occurrence of word in an sentence in java script

2 Answers2