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Changing an element's ID with jQuery
...he id is a useful and worthwhile thing to do if you're building up the DOM by using hidden-templates in the HTML and then cloning them using jquery.
– Steve Knight
Aug 2 '11 at 8:40
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Selenium wait until document is ready
...ed solution only waits for DOM readyState to signal complete. But Selenium by default tries to wait for those (and a little bit more) on page loads via the driver.get() and element.click() methods. They are already blocking, they wait for the page to fully load and those should be working ok.
Probl...
Merge up to a specific commit
...to get in your master branch.
You can find out more about any git command by doing git help <command>. It that case it's git help merge. And docs are saying that the last argument for merge command is <commit>..., so you can pass reference to any commit or even multiple commits. Though,...
Reshaping data.frame from wide to long format
...tations that give the same result:
# you can also define the id-variables by column number
melt(wide, id.vars = 1:2)
# as an alternative you can also specify the measure-variables
# all other variables will then be used as id-variables
melt(wide, measure.vars = 3:7)
melt(wide, measure.vars = as.ch...
How do you add an in-app purchase to an iOS application?
...wift in your app, you can do the following:
Create a new .h (header) file by going to File > New > File... (Command ⌘ + N). This file will be referred to as "Your .h file" in the rest of the tutorial
When prompted, click Create Bridging Header. This will be our bridging header file. If you...
Index on multiple columns in Ruby on Rails
...ut checking uniqueness at validation time vs. on index: the latter is done by database while the primer is done by the model. Since there might be several concurrent instances of a model running at the same time, the validation is subject to race conditions, which means it might fail to detect dupli...
Foreign Key to non-primary key
...primary key), and a Claim table that also contains a SSN column (populated by business logic from the Customer data, but no FK exists). The design is flawed, but has been in use for several years, and three different applications have been built on the schema. It should be obvious that ripping out...
MySQL integer field is returned as string in PHP
...k to an integer using the following code:
$id = (int) $row['userid'];
Or by using the function intval():
$id = intval($row['userid']);
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Correct way to pass multiple values for same parameter name in GET request
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I would suggest looking at how browsers handle forms by default. For example take a look at the form element <select multiple> and how it handles multiple values from this example at w3schools.
<form action="/action_page.php">
<select name="cars" multiple>
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Condition within JOIN or WHERE
... INNER JOIN queries with WHERE clauses can have the predicates rearrranged by the optimizer so that they may already be excluded during the JOIN process.
I recommend you write the queries in the most readable way possible.
Sometimes this includes making the INNER JOIN relatively "incomplete" and p...