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Add a reference column migration in Rails 4
...users and uploads tables and wish to add a new relationship between them.
All you need to do is: just generate a migration using the following command:
rails g migration AddUserToUploads user:references
Which will create a migration file as:
class AddUserToUploads < ActiveRecord::Migration
...
In what order are Panels the most efficient in terms of render time and performance?
...ates relative to the Canvas area.
The Canvas has the best performance of all the panels for the arrange pass since each item is statically assigned a location. The measure pass also has excellent performance since there is no concept of stretching in this panel; each child simply uses its native ...
Android - Setting a Timeout for an AsyncTask?
...ask.get()
myDownloader.get(30000, TimeUnit.MILLISECONDS);
Note that by calling this in main thread (AKA. UI thread) will block execution, You probably need call it in a separate thread.
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Select parent element of known element in Selenium
...rue.
Output: <div class="parent">
//span/ancestor::* - returns all ancestors (including parent).
Output: <div class="parent">, <nav class="second_level_ancestor">, <div class="third_level_ancestor">...
//span/ancestor-or-self::* - returns all ancestors and current...
Python code to remove HTML tags from a string [duplicate]
...tifulSoup
You could also use BeautifulSoup additional package to find out all the raw text
You will need to explicitly set a parser when calling BeautifulSoup
I recommend "lxml" as mentioned in alternative answers (much more robust than the default one (i.e. available without additional install) ...
ASP.NET Identity - HttpContext has no extension method for GetOwinContext
...
ARGH!
I found it... I didn't have an extra package, called Microsoft.Owin.Host.SystemWeb
Once i searched and installed this, it worked.
Now - i am not sure if i just missed everything, though found NO reference to such a library or package when going through various tutorials...
Can I pass parameters by reference in Java?
... Also, an array of length 1 can be used to create a reference if you really want to confuse people :)
– Christoffer
Jul 1 '09 at 12:18
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How to get the browser viewport dimensions?
...zoom variations may cause mobile values to wrongly scale down to what PPK calls the visual viewport and be smaller than the @media values
zoom may cause values to be 1px off due to native rounding
undefined in IE8-
document.documentElement.clientWidth and .clientHeight
equals CSS viewport width mi...
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
... Communications link failure, then it means that the DB isn't reachable at all. This can have one or more of the following causes:
IP address or hostname in JDBC URL is wrong.
Hostname in JDBC URL is not recognized by local DNS server.
Port number is missing or wrong in JDBC URL.
DB se...
REST API 404: Bad URI, or Missing Resource?
... This makes sense. I have to wonder, though, whether any benefit is actually gained from returning the 404 in the first place, versus returning a 200 with a null response?
– Brian Lacy
Mar 29 '12 at 19:15
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