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How do I handle too long index names in a Ruby on Rails ActiveRecord migration?
...archable"} in this case the index was in fact a multi-column(searchable_id and searchable_type) and the addition of the namespace in the generated name became very long.
– mkrinblk
Jan 3 '17 at 22:56
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How to get the device's IMEI/ESN programmatically in android?
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You want to call android.telephony.TelephonyManager.getDeviceId().
This will return whatever string uniquely identifies the device (IMEI on GSM, MEID for CDMA).
You'll need the following permission in your AndroidManifest.xml:
<uses-per...
Android: how to handle button click
Having a solid experience in non-Java and non-Android area, I'm learning Android.
10 Answers
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How do I link to part of a page? (hash?)
...htags in the url like : example.com/#RouteName?page=1#ID. one for routing and one for navigation inside of current page. finally i used html5 mode of URL in order to removing route hashtags ;) @tomsmeding
– iraj jelodari
Nov 19 '16 at 15:20
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How can I create and style a div using JavaScript?
How can I use JavaScript to create and style (and append to the page) a div, with content?
I know it's possible, but how?
9...
Compare JavaScript Array of Objects to Get Min / Max
I have an array of objects and I want to compare those objects on a specific object property. Here's my array:
16 Answers
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Immutable vs Mutable types
... changing what the variable refers to. A mutable type can change that way, and it can also change "in place".
Here is the difference.
x = something # immutable type
print x
func(x)
print x # prints the same thing
x = something # mutable type
print x
func(x)
print x # might print something differe...
MongoDB: Combine data from multiple collections into one..how?
...you can use as an _id.
For example, let's say you have a users collection and a comments collection and you want to have a new collection that has some user demographic info for each comment.
Let's say the users collection has the following fields:
_id
firstName
lastName
country
gender
age
And...
Passing A List Of Objects Into An MVC Controller Method Using jQuery Ajax
...et; set; }
}
There are two things I learned from this:
The contentType and dataType settings are absolutely necessary in the ajax() function. It won't work if they are missing. I found this out after much trial and error.
To pass in an array of objects to an MVC controller method, simply use th...
Are there conventions on how to name resources?
Are there conventions how to name resources in Android? For example, buttons, textViews, menus, etc.
15 Answers
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