php - How to efficiently merge and possibly convolute two arrays? -


suppose, have 3 arrays:

$a = [ 1, 2, 3 ];       // victim #1 $b = [ 4, 5, 6, 7, 8];  // victim #2 $result = [];           // result

i need merge $a , $b in such order, each element of $a array should followed element of array $b. elements of $b array, however, might follow each other.

for example:

1 4 2 5 6 3 7 8

i have tried this:

while($a || $b)     {         $bool = rand(1, 100) >= 50;          if($a)             {                 $result[] = array_shift($a);             }          if($b)             {                 $result[] = array_shift($b);             }          if($bool && $b)             {                 $result[] = array_shift($b);             }     }

which gives desired output:

array (     [0] => 1     [1] => 4     [2] => 5     [3] => 2     [4] => 6     [5] => 7     [6] => 3     [7] => 8 )

however, think might inefficient because of array_shift()s , if()s appears times there.

question: is there more efficient way that?

p.s.: thanks, know how use array_merge(). not rtm issue.

foreach ($a $value) {     $result[] = $value;     {         $bool = rand(0,1) == 1;         $result[] = array_shift($b);     } while ($bool); } // insert remaining of value $b in $result foreach ($b $value)     $result[] = $value;

Comments

Post a Comment

Popular posts from this blog

php - Add the correct number of days for each month -

using following function can display years , months between 2 dates, how can add correct days each month array within each month? can't add days manually need account leap years etc. function yearmonth($start_date, $end_date) { $begin = new datetime( $start_date ); $end = new datetime( $end_date); $interval = new dateinterval('p1m'); // 1 month interval $period = new dateperiod($begin, $interval, $end); foreach ( $period $dt ) $years[$dt->format( "y" )][] = $dt->format( "f" ); return $years; } $list = yearmonth("2007-03-24", "2009-06-26"); var_dump($list); since nobody else answered: function yearmonth($start_date, $end_date) { $begin = new datetime( $start_date ); $end = new datetime( $end_date); $interval = new dateinterval('p1d'); // 1 month interval $period = new dateperiod($begin, $interval, $end); $lastmonth = null; $lastyear = null; $aresult = array(); forea...
Read more

java.util.scanner - How to read and add only numbers to array from a text file -

i'm learning java , have question regarding reading file want read numbers file contains strings well. here example of file: 66.56 "3 java 3-43 5-42 2.1 1 and here coding: public class test { public static void main (string [] args){ if (0 < args.length) { file x = new file(args[0]); try{ scanner in = new scanner( new fileinputstream(x)); arraylist<double> test = new arraylist<>(); while(in.hasnext()){ if(in.hasnextdouble()){ double f=in.nextdouble(); test.add(f);} else {in.next();} } catch(ioexception e) { system.err.println("exception during reading: " + e); } } my problem add 66.56,2.1 , 1 doesn't add 3 after "3 or ignores 3-43 , 5-42 can tell me how skip strings , add doubles here? thanks all said 3 ie; "3, 3-43 , 4-42 strings either u read string , split , check number @ " , - or put in space between characters , integers. jvm after compilation tre...
Read more