How to print an entire array when third dimension is constant

Question

How to print an entire array when one index is constant.

For understanding purposes I have made this array

$actionF = array(
    "enemyHlth" =>  array(array()),
    "enemyBlts" =>  array(array())
);

with input

The array structure is supposed to store top three rows under a 3D array with 3rd dimension is just a constant "Enemy Health" while the bottom three in 3D array with same for 3rd dimension "Enemy Bullets". And both these two 3D arrays are stored in a single array called ActionF

Now when I try to print it

for($level=0;$level<$n;$level++){  
    $actionF["enemyHlth"] = array ( $level =>  fscanf($_fp,"%d\t%d\t%d\n")
                                    );            
}

for($bullets = 0;$bullets<$m; $bullets++){  
    $actionF["enemyBlts"] = array ( $bullets => fscanf($_fp,"%d\t%d\t%d\n")
                                    );           
}
print_r($actionF);

Output

3 2 1

I think it is printing the last index of above I/P. How to make a 2D array when third dimension is just a constant or is there something else am I missing?

I think that the way you're reading the data is bad. Try this: instead of those two **for** statements use this to display the whole array: `print_r($actionF);` I think you'll see the array does not contain what you expect, because you haven't read the file correctly. I could try helping you write the correct code but I'm not sure what you want to achieve. What should **$actionF["enemyHlth"]** and **$actionF["enemyBlts"]** contain at the end, assuming everything works well? Also, what are **$n** and **$m**? By the way, you're also missing a *$* in front of *n* here: *$bullets — Andreyu, Jun 11 '16 at 15:19
Its a challenge type program from Hacker's Rank. You can find it "A Super Hero" by ma5termind — phpNoob, Jun 11 '16 at 15:29
You're not adding to the `enemyHlth` element each time through the first loop, you're simply overwriting it. If you want to add to an array, it should be either `$actionF["enemyHlth"][] = new element;` or `$actionF["enemyHlth"][$key] = new element;` depending on whether you're creating an indexed or associative array. Your question doesn't say what the array is supposed to look like. — Barmar, Jun 11 '16 at 15:44
Yes I changed them to this `fscanf($_fp,"%d\t%d\t%d\n")` now it is at least reading the line but it is only reading last line. — phpNoob, Jun 11 '16 at 15:52
I tried print_r at first it showed something which made no sense but now it is initializing the 2 index of level and bullets correctly. — phpNoob, Jun 11 '16 at 15:54

score 1 · Answer 1 · answered Jun 11 '16 at 15:59

1

I rewrote your code and I think it works well like this:

First, the input:

$actionF = array(
        "enemyHlth" =>  array(),
        "enemyBlts" =>  array()
        );

for($level=0;$level<$n;$level++){

    $line = fgets($_fp);

    $processed = explode(" ", $line);

    if ($line != false) {
        $actionF["enemyHlth"][$level] = $processed;
    }

}

for($bullets = 0;$bullets<$m; $bullets++){  

    $line = fgets($_fp);

    $processed = explode(" ", $line);

    if ($line != false) {
         $actionF["enemyBlts"][$bullets] = $processed;           
    }
}

And here's the output:

for($i=0;$i<$n;$i++){
    for($j=0;$j<$m;$j++){
        print $actionF["enemyHlth"][$i][$j];
    }
    print "\n";
}

answered Jun 11 '16 at 15:59

Andreyu

424
1
5
19

You have used fgets but it returns a string rather than a integer which is required. – phpNoob Jun 12 '16 at 03:08
Would like to know the purpose why you are checking the line since the input is already defined in proper format? – phpNoob Jun 12 '16 at 05:32
PHP will auto-cast to integers strings that look like integers. You can write this code: `` and it will output 17. So it's ok if they are strings. If you want to be extra safe you can force cast them to integer. See this: http://stackoverflow.com/questions/8529656/how-do-i-convert-a-string-to-a-number-in-php . Regarding your second question, I'm checking the line out of habit. In real-life programming you can't ever trust the input, you must check it. In your case you can remove the test because you can be sure the input is correct. – Andreyu Jun 12 '16 at 06:47

How to print an entire array when third dimension is constant

1 Answers1