a code which reverses null terminated string

Question

I am new to js.
I am trying to write a code which reverses null terminated string.
I tried writing using push and pop.
but i am not getting output, can you tell me what is the problem.
providing code below

var word = "Cell0";
//var char = word.stringCharAT();


for (i=0;  i< word.length; i++) {
    var pushWord = [];

    pushWord.push(word[i]);

    for (j=0;  j< pushWord.length; j++) {
        var reverseWord= [];
        reverseWord = pushWord[j].pop;
        console.log("reverseWord" + reverseWord);

    } 
}

`pushWord[j]` is not an array, `.pop` is not called. What is expected result? — guest271314, Apr 22 '17 at 23:46

score 0 · Answer 1 · answered Apr 22 '17 at 23:48

0

Here's a solution.

var word = "Cell0"; 
var reversed = ''; 
for (var i = word.length-1; i >= 0; i--) {
    reversed += word[i];
} 
console.log(reversed);

This loops through the characters of the string in reverse and adds the characters to a new string.

answered Apr 22 '17 at 23:48

heylookltsme

124
6

hello but how to test for null terminated string – Apr 23 '17 at 00:49

score 0 · Answer 2 · answered Apr 22 '17 at 23:53

0

pushWord[j] is not an array, .pop is not called.

Define pushWord and reverseWord arrays outside of for loop, within loop, after word[i] is pushed to pushWord, call .unshift() on reverseWord with pushWord[pushWord.length -1] as parameter.

var word = "Cell0";
var pushWord = [];
var reverseWord = [];
for (let i = 0; i < word.length; i++) {
  pushWord.push(word[i]);
  reverseWord.unshift(pushWord[pushWord.length - 1]);
}
console.log("reverseWord" + reverseWord);

answered Apr 22 '17 at 23:53

guest271314

1
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hello but how to test for null terminated string – Apr 23 '17 at 00:48
Are you trying to check for `0` character? – guest271314 Apr 23 '17 at 00:53
even i am not sure what does null terminated string means – Apr 23 '17 at 01:06
hello can you help me with this one http://stackoverflow.com/questions/43600110/minimise-the-code-since-i-am-using-the-same-code-only-the-content-in-p-tags-chan – Apr 25 '17 at 03:34

score 0 · Answer 3 · answered Apr 23 '17 at 00:13

0

var originalWord = "Cell0";
var reverseWord = [];
for (let i = 0; i < originalWord.length; i++) {
  reverseWord.unshift(originalWord [i]);
}
console.log(reverseWord.join(''));

You don't even need to push. Another way to achieve the result!

answered Apr 23 '17 at 00:13

Pankaj Shukla

2,657
2
11
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hello but how to test for null terminated string – Apr 23 '17 at 00:48
What exactly you want to test? Can you provide a test case? – Pankaj Shukla Apr 23 '17 at 01:15
In Javascript you don't need to care about null terminated string. See this link: http://stackoverflow.com/questions/12603931/why-doesnt-the-null-terminator-placed-arbitrarily-in-a-string-terminate-it – Pankaj Shukla Apr 23 '17 at 01:18
hello can you help me with this one http://stackoverflow.com/questions/43600110/minimise-the-code-since-i-am-using-the-same-code-only-the-content-in-p-tags-chan – Apr 25 '17 at 03:34
Didn't my solution help? – Pankaj Shukla Apr 26 '17 at 17:40

a code which reverses null terminated string

3 Answers3