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Suppose we have a binary matrix. We have to find the same matrix, but each cell's value will be the Manhattan distance to the nearest 0. We can assume at least one 0 exists in the matrix.So, if the input is like101101110then the output will be101101210as only the bottom left cell has distance of 2 to the nearest 0.To solve this, we will follow these steps −m := row size of matrix, n := column size of matrixfor y in range 0 to m, dofor x in range 0 to n, doif matrix[y, x] is non-zero, thenmatrix[y, x] := infinityfor ... Read More
Suppose we have a list of coins and another value amount, we have to find the number of combinations there are that sum to amount. If the answer is very large, then mod the result by 10^9 + 7.So, if the input is like coins = [2, 5] amount = 10, then the output will be 2, as we can make these combinations − [2, 2, 2, 2, 2], [5, 5]To solve this, we will follow these steps −m := 10^9 + 7dp := a list of size same as amount + 1, and fill it with 0dp[0] := 1for ... Read More
Suppose we have a list of numbers called nums and another value target. We have to find the lowest sum of pair of numbers that is larger than target.So, if the input is like nums = [2, 4, 6, 10, 14] target = 10, then the output will be 12, as we pick 2 and 10To solve this, we will follow these steps −sort the list numsn := size of numsanswer := 10^10i := 0, j := n - 1while i < j, doif nums[i] + nums[j] > target, thenanswer := minimum of answer and (nums[i] + nums[j])j := j ... Read More
To push values into an associative array, use the brackets [] []. At first create an associative array −$details= array ( 'id' => '101', 'name' => 'John Smith', 'countryName' => 'US' );The PHP code is as follows to insert values −Example Live Demo OutputArray ( [studentDetails] => Array ( [0] => Array ( [id] => 101 [name] => John Smith [countryName] => US ) ) )
Let’s say the following is our string including hyphen and numbers as well −"John-45-98-78-7898906756"To extract numbers after – i.e. hyphen, use the concept of explode() with parameters - and $yourVariableName.The PHP code is as follows −Example Live Demo Output7898906756
To cast variable to array, use the below syntax −$yourNewVariableName=(array)$yourVariableName;The PHP code is as follows −Example Live Demo OutputArray ( [0] => Mike [1] => Sam [2] => David )
For this, you can use for loop along with some conditions.The PHP code is as follows −Example Live Demo OutputEven 1 Even 3 EvenAbove, for 0th index, the text “Even” is displayed and the same goes on for 2th and 4th index.
Following is the syntax to display array valuesdo{ //statement1 //statement2 . . . n } while(yourCondition);The PHP code is as follows −Example Live Demo OutputJohn David Mike Sam Carol
If you try to use ++ operator with string value then it increments the last character value with 1 and prints the ASCII value.Following is the PHP code −Example Live Demo OutputThe string modified value is=Joho The string incremented value is=11.5
To get the correct length, use mb_strlen() for Unicode characters.The PHP code is as follows −Example Live DemoOutputThe string length with mb_strlen=9 The string length with strlen=10