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Gem::LoadError for mysql2 gem, but it's already in Gemfile
...'re rails version 4.x.x.
https://github.com/brianmario/mysql2/issues/675
Then run bundle update mysql2.
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How can I find and run the keytool
...p to c drive
open cmd prompt
type cd C:\Program Files\Java\jdk1.6.0_26\bin
then type only keytool -export -alias myAlias -keystore C:\Users\<your user name>\.android\myKeyStore | C:\openssl-0.9.8k_WIN32\bin\openssl sha1 -binary | C:\openssl-0.9.8k_WIN32\bin\openssl enc -a -e
Done
To get Cer...
Postgis installation: type “geometry” does not exist
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If the Postgis-Extension is loaded, then your SQL perhaps does not find the geometry-type because of missing search-path to the public schema.
Try
SET search_path = ..., public;
in the first line of your scsript. (replace ... with the other required search-...
Android - startActivityForResult immediately triggering onActivityResult
...singleInstance in AndroidManifest file. If the Activity is singleInstance, then it will return RESULT_CANCELED before launched!
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How do I display a text file content in CMD?
...tail -f. If you're going to install the GNU utilities for windows, you can then use those things.
– speciesUnknown
Apr 15 '19 at 14:30
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What does FrameLayout do?
I'm new to programming. I was using Graphical Layout then when I was reading xml file, I saw FrameLayout. Then I searched, but I couldn't find something useful. What is FrameLayout and what does it do?
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Android Studio: Module won't show up in “Edit Configuration”
...ny changes to your gradle file, just close the project file-->close and then re-open the project. It may be Android Studio caching problem.
– Chanaka Fernando
May 6 '19 at 21:47
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Getting the last element of a list
...or list() objects might end up being empty as so: astr = '' or alist = [], then you might want to use alist[-1:] instead of alist[-1] for object "sameness".
The significance of this is:
alist = []
alist[-1] # will generate an IndexError exception whereas
alist[-1:] # will return an empty list
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How to convert nanoseconds to seconds using the TimeUnit enum?
...instead returning 0. If you don't want to use a hard coded 10 digit number then use something like 1E9. For example : double seconds = ((double) nanoseconds) / 1E9; I would do this every time as a personal preference.
– TechTrip
Aug 14 '14 at 3:48
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How to check whether a Storage item is set?
...... If the given key does not exist in the list associated with the object then this method must return null. ...
So, you can:
if (localStorage.getItem("infiniteScrollEnabled") === null) {
//...
}
See this related question:
Storing Objects in HTML5 localStorage
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