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Cannot set property 'innerHTML' of null
...ads the entire HTML DOM from top to bottom. Any JavaScript code written inside the script tags (present in head section of your HTML file) gets executed by the browser rendering engine even before your whole DOM (various HTML element tags present within body tag) is loaded. The scripts present in h...
How can I get the corresponding table header (th) from a table cell (td)?
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what about colspans?
– bradvido
Jan 23 '15 at 21:08
@bradvido - My answer takes that into acc...
How to see the changes between two commits without commits in-between?
... This answer utterly fails to address the question, so I have no idea why it has so many upvotes. The OP is specifically asking how NOT to get the first command you give, and the second has nothing to do with anything.
– psusi
Sep 4 '15 at 17:51
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Rails migration: t.references with alternative name?
...n with this:
add_foreign_key :courses, :courses, column: :transferrable_as_id
add_foreign_key :courses, :courses, column: :same_as_id
Update
In Rails 5.1 and above you can add the foreign key in the migration in the create_table block like this:
create_table :courses do |t|
t.string :name
t.ref...
Log all queries in mysql
...tead of --log. By default, queries that take 10 seconds or longer are considered slow, you can change this by setting long_query_time to the number of seconds a query must take to execute before being logged.
share
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Hash function that produces short hashes?
...h and produce a sub-10-character hash? I want to produce reasonably unique ID's but based on message contents, rather than randomly.
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how to check if a form is valid programmatically using jQuery Validation Plugin
I have a form with a couple of buttons and I'm using jQuery Validation Plugin from http://jquery.bassistance.de/validate/ . I just want to know if there is any way I can check if the form is considered in valid state by jquery validation plugin from anywhere in my javascript code.
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Sending POST data in Android
...cripting languages, but I don't have a lot of experience with Java or Android.
15 Answers
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Custom Drawable for ProgressBar/ProgressDialog
Reading the limited documentation that Google has provided, I get the feeling that it is possible to change the look (drawable) of a ProgressBar/ProgressDialog by simply creating a new style an assigning it to the style property of the ProgressBar. But I cannot get this to work properly. Here is wha...
How does cookie based authentication work?
...e.
There are different options you can configure for the cookie server side, like expiration times or encryption. An encrypted cookie is often referred to as a signed cookie. Basically the server encrypts the key and value in the dictionary item, so only the server can make use of the informati...