PHP is a programming language that’s primarily used for server-side web programming. MySQL is a relational database. The reasons you see them used together are as follows: Both are free and open-source Both are widely available on most web hosts (even shared hosting providers) PHP is used to create dynamic web pages, while MySQL is … Read more
Use PDO like this, PDO and mysql_* functions not working together, you have to use them separately $sth = $dbh->prepare(‘SELECT COUNT(username) FROM users WHERE username= :username GROUP BY username’); $sth->bindParam(‘:username’, $username, PDO::PARAM_STR); $sth->execute(); if ($sth->fetchColumn() > 0) { echo “username taken”; } 2 solved PHP check for existing entry in database [closed]
jQuery, assuming a correct object DEMO var pizzaNames=[], data = { “pizza” : { “pepperoni lovers”: { “topping”: “pepperoni”, “crust”: “hand tossed” }, “sausage lovers”: { “topping”: “sausage”, “crust”: “hand tossed” } } } // $.each is IE8 compatible, Object.keys is not $.each(data.pizza,function(name,val) { pizzaNames.push(name); }); 3 solved Jquery loop through a Json object [duplicate]
I’m assuming that A and B are coordinates, and you want to “draw” the plot in matrix form, so try this: c = flipud(full(sparse(B, A, B))); I added flipud to adjust the positive direction of the y-axis upwards. Alternatively, you can obtain a binary matrix using this: c1 = flipud(full(sparse(B, A, ones(size(A))))); Important: for this … Read more
The = operator invokes the set<Field> method in Groovy. This is the reason why the classpath of the runDynamoDB task only contains a single file. You should use the classpath(Object… paths) which appends to the classpath: Change the line to the following example to add the file to the default classpath: classpath files(…) // without … Read more
Consider this simple function: function enumerate(x, fn) { if (x && typeof x === ‘object’) { for (let val of Object.values(x)) { fn(val); enumerate(val, fn); } } } It walks through a nested object structure and invokes the given callback for each value it finds (no matter object or primitive). You can apply it to … Read more
A few things to discuss here 1) ANALYZE TABLE COMPUTE STATISTICS; Don’t use this command. It is obsolete. It is designed to collect information on the table to allow queries against it to be run in the best fashion. Use DBMS_STATS.GATHER_TABLE_STATS instead. And that’s just an obvious lead in to that you should have a … Read more
Working Snippet var password = prompt(“Enter password”, “1234567890Aa1234567890”); var regex = /^(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{6,20}$/; console.log(“Password valid?: “, regex.test(password)); The regex had 2 things missing The range {6,20} Plus, the ^ and $, in the start and end of the regex. They signify, that the regex should apply end to end, and not a subset of the string. … Read more
Write a Python function histogram(l) that takes as input a list of integers with repetitions and returns a list of pairs [closed] solved Write a Python function histogram(l) that takes as input a list of integers with repetitions and returns a list of pairs [closed]
You have the right idea, but there were a few issues with your code. Side Note: In programming, it’s pretty much always a good idea to name your variables/functions something meaningful and descriptive. In the code sample below, I changed the name of your function hey to increment since the purpose of that function is … Read more
It would be something like: delete t from loginsystem t where premium = ‘1 DAY’ and created_at < now() – interval 1 day; solved MySQL: Delete rows that contain a specific parameter and are older then a day [closed]
Yes, you can do this recursively, if all you have is lists and dictionaries, then that is pretty trivial. Test for the object type, and for containers, recurse: def unwrap_data(obj): if isinstance(obj, dict): if ‘data’ in obj: obj = obj[‘data’] return {key: unwrap_data(value) for key, value in obj.items()} if isinstance(obj, list): return [unwrap_data(value) for value … Read more
These various steps can be achieved by simply wrapping the database call in some error handling. The overall structure would be something like this: try { // Perform your SELECT statement } catch (SqlException e) { // Log the error, send an email, etc. } As for what goes where the comments are, that’s up … Read more
A naive implementation (no inet_pton) would user 4 numbers and print them into a char array #include <stdio.h> int inc_ip(int * val) { if (*val == 255) { (*val) = 0; return 1; } else { (*val)++; return 0; } } int main() { int ip[4] = {0}; char buf[16] = {0}; while (ip[3] < … Read more
I think it is better to use a database that is not used by anything else but whatever uses the data (as it is a lot of text data and may slow down SQL queries) and create seperate tables for each category of data. Ad@m solved Best way to store large data in mysql