logic

I would like to know some solutions to such a problem. It is given a number lets say 16 and you have to arrange a matrix this way 1 2 3 4 12 13 14 5 11 16 15 6 10 9 8 7 the language doesn't matter, (preferably PHP); [EDIT: Update] If language doesn't matter: Go to: http://rosettacode.org/wiki/Spiral_matrix In PHP: Here you go: <?php function getSpiralArray($n) { $pos = 0; $count = $n; $value = -$n; $sum = -1; do { $value = -1 * $value / $n; for ($i = 0; $i < $count; $i++) { $sum += $value; $result[$sum / $n][$sum % $n] = $pos++; } $value *= $n; $count--; for ($i = 0; $i < $count; $i++) { $sum

I was solving one of the puzzles and came across swapping column values using DML queries: SELECT * FROM TEMP_TABLE; ID1, ID2 -------- 20, 15 20, 15 20, 15 Solution is mathematical calculation: UPDATE TEMP_TABLE SET ID1=ID1+ID2; UPDATE TEMP_TABLE SET ID2=ID1-ID2; UPDATE TEMP_TABLE SET ID1=ID1-ID2; Now, I am trying to figure out whether this can be applied to Strings or not, please suggest. SELECT * FROM TEMP_TABLE_NEW; ID1, ID2 -------- ABC, XYZ ABC, XYZ ABC, XYZ René Nyffenegger There's no need to have three update statements, one is sufficient: UPDATE temp_table_new SET id1 = id2, id2 = id1;

I want to call REST API related to file storage of azure through postman. Here is how I am making my request : I am making request to list all shares in file storage account as described here : https://docs.microsoft.com/en-us/rest/api/storageservices/list-shares I am getting below error: "The Date header in the request is incorrect." What changes I should make ? Edit1 : When I provided date n correct format, I have error like this : I am getting below error: "The MAC signature found in the HTTP request '' is not the same as any computed signature. Server used following string to sign: 'GET"

You walk into a store, select several products, then go to the counter to pay your bill. The total is some amount ( A ). You reach into your wallet, purse, or pocket and put down some cash ( P ), where P >= A , and the cashier gives you change. Given the set of coins and bills that are in circulation, what are the most likely values for P ? Some examples, assuming that the available bills are $5, $10, $20, $50 and $100, and the available coins are 5c, 10c and 25c: A = $151.24 P[1] = $160 (8x$20) or ($100 + 3x$20) P[2] = $155 ($100 + $50 + $5) A = $22.65 P[1] = $25 ($20 + $5) P[2] = $30 ($20 +

We are building a survey engine for our internal use. I would like to know how to persist the question branching logic into the database? Any body done this before or any ideas on the schema for the database? If the user responses with an answer, we need to skip to the next questions based on the logic added to the questions Each question can have multiple logic added to it. For eg: Question: Is it Sunny, Raining or Cloudy? Answer: Raining. The next question should be based on the previous answer. if(Raining) { } if(Sunny) { } if(Cloudy) { } how do I persist the above to the database and go

I am just learning RoR so please bear with me. I am trying to write an if or statement with strings. Here is my code: <% if controller_name != "sessions" or controller_name != "registrations" %> I have tried many other ways, using parentheses and || but nothing seems to work. Maybe its because of my JS background... How can I test if a variable is not equal to string one or string two? This is a basic logic problem: (a !=b) || (a != c) will always be true as long as b != c. Once you remember that in boolean logic (x || y) == !(!x && !y) then you can find your way out of the darkness. (a !=b) |