increment

I have the following table: CREATE TABLE 'Test' ('Id' INTEGER PRIMARY KEY NOT NULL, 'Val' INTEGER) If a given Id doesn't exist, I want to insert the Id with a default Val. But if it already exists, I want to increase the value of Val. I have this code: $data = array(':id'=>$id); $stmt = $db->prepare('INSERT INTO Test (Id, Val) Values(:id, 1);'); if(!$stmt->execute($data)){ $stmt = $db->prepare('UPDATE Test SET Val=Val+1 WHERE Id=:id'); $stmt->execute($data); } and it works, but I would want to do it with a single SQL statement. Can I? EDIT : From @Xikinho90's answer, my final code is $stmt =

I am still very new to Python (3). I have a BUNCH of sensor data, but the download limit forces me to retrieve the data in chunks instead of all at once (each .zip file downloaded contains a folder of .csv files for each sensor's data during a given time period). Thus, I have dozens of large .csv files distributed among several folders that I would eventually like to concat/merge/append into one .csv file for each sensor's full data. To make things more complicated, .csv file names for each sensor are identical across the folders. I have developed the following code to rename and move the

I'm using this code <a id="minus" href="#">-</a> <span id="VALUE">0</span> <a id="plus" href="#">+</a> Javascript: $(function(){ var valueElement = $('#VALUE'); function incrementValue(e){ valueElement.text(Math.max(parseInt(valueElement.text()) + e.data.increment, 0)); return false; } $('#plus').bind('click', {increment: 1}, incrementValue); $('#minus').bind('click', {increment: -1}, incrementValue); }); to have a plus/minus incrementator of the filed named "VALUE". Now, i have a form using this containing 150 field like this... there's a way to generalize this code passing in some way to the

I'm learning C++ and I have this problem: #include <iostream> using namespace std; class test { public: test(){}; test(int i):var{i}{}; test& operator++(){++var; return this;} test operator++(int dummy){test tmp =*this;var++;return tmp;} friend ostream& operator<<(ostream&, const test&); private: int var; }; ostream& operator<<(ostream& o, const test& obj) { o<<obj.var; return o; } int main() { test obj{2}; cout << obj << endl; obj++; cout << obj << endl; cout << obj <<' '<< ++obj<<endl; return 0; } the output i expected was: 2 3 3 4 instead i have: 2 3 4 4 if i replace the last increment +

My problem looks as follows: I want to make a vote app where People can choose one or more Events(like Doodle). For this I have set up a function called vote. In the View you can choose the Events using checkboxes. The Models are Poll and Groupevent. A Poll has Many Groupevents. My Problem is when I call updateAll() , all values of the associated Groupevents are incremented. Here is my code: View: echo $this->Form->create('Poll', array('action' => 'vote')); for($i=0; $i<$count; $i++){ echo $this->Form->input('Groupevent.'.$i.'.votes', array('type'=>'checkbox', 'label'=>$this->Groupevent[

So I declare a variable some where and initialize it. Now later on I need to use it to loop while its still positive so I need to decrement it. To me looping using a condition and a decrement calls for a for but for it we are missing the first part the initialization. But I don't need to initialize anything. So how do I go about that in a nice way. for (space = space; space > 0; space--)//my first way to do it but ide doesnt like it Second way: for (; space > 0; space--)//my friend recommended me this way but looks kind weird Are there more ways for me to have a loop with only condition and

I have a do while loop where I am adding a variable to itself while read line do let variable=$variable+$someOtherVariable done return $variable When I echo the value of $variable I get no output ... Is this the correct way to add some value back to the variable itself (i.e. i = i+j) Also, in the context of bash scripting what is the scope in this case.. The problem is that the variable is not visible outside of the scope (the assignment is not propagated outside the loop). The first way that comes to mind is to run the command in a subshell and forcing the loop to emit the variable: variable=