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Multiple Updates in MySQL
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If there is no duplicates then i dont want that row to be inserted. what should id do? because i am fetching information from another site which maintains tables with id's. I am inserting values with respect to that id. if the site has new records the...
Best way to add page specific JavaScript in a Rails 3 app?
... to do is include the per-view Javascript in a content_for :head block and then yield to that block in your application layout. For example
If it's pretty short then:
<% content_for :head do %>
<script type="text/javascript">
$(function() {
$('user_rating_positve').click(fu...
Creating an empty Pandas DataFrame, then filling it?
...riences, creating a data frame of the necessary size filled with NaNs, and then filling up with values is much-much slower than creating a data frame with index x 0 dimensions (columns = []), and attaching one column in each turn of a loop. I mean df[col_name] = pandas.Series([...]) in a loop iterat...
AngularJS ngClass conditional
... differences, you can read about here.
If your conditional is too complex, then you can use a function that returns truthy or falsey, as you did in your third attempt.
Just to complement: You can also use logical operators to form logical expressions like
ng-class="{'test': obj.value1 == 'someoth...
Using Git with an existing Xcode project
...pository to an existing project simply by doing Source Control, Commit and then doing my first commit. That created the .git folder, etc. (No need for the git init, git add . and git commit -m.)
– Jeff
Jul 22 at 6:30
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Apply .gitignore on an existing repository already tracking large number of files
...This answer solved my problem:
First of all, commit all pending changes.
Then run this command:
git rm -r --cached .
This removes everything from the index, then just run:
git add .
Commit it:
git commit -m ".gitignore is now working"
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stopPropagation vs. stopImmediatePropagation
...r on #child");
});
// First this event will fire on the child element, then propogate up and
// fire for the parent element.
$("div").click(function(e) {
handlePropagation(e);
console.log("Event handler on div: #" + this.id);
});
// Enable/disable propogation
$("button").click(fun...
What is Mocking?
... simple in-memory structure for storing records. The object under test can then read and write records to the database stub to allow it to execute the test. This could test some behavior of the object not related to the database and the database stub would be included just to let the test run.
If yo...
What is a loop invariant?
... correctness?
The invariant is the logical statement:
if ( A[mid] == a ) then ( start <= mid <= end )
This statement is a logical tautology - it is always true in the context of the specific loop / algorithm we are trying to prove. And it provides useful information about the correctness ...
View more than one project/solution in Visual Studio
...not so obvious) way; right click on the Visual Studio icon in the taskbar, then right click on the application name in the popup menu, then click "Open". Windows will then open another instance where you can open another solution in.
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