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How to delete shared preferences data from App in Android
...ring the preferences file does not appear to actually delete it. In my own tests by watching the "Data" usage listed in the App Info panel, creating a new SharedPreference file adds 4KB to this value but using editor.clear().commit() does not reduce the number.
– Code Commander...
How do you overcome the HTML form nesting limitation?
...tatement, you will be able to view the support for this feature here: html5test.com/compare/feature/form-association-form.html. IE is a write-off, most other desktop browsers seem tolerable.
– fatty
Dec 22 '13 at 3:57
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Global variables in R
... set a global variable in a mailinglist posting via assign:
a <- "old"
test <- function () {
assign("a", "new", envir = .GlobalEnv)
}
test()
a # display the new value
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How to remove not null constraint in sql server using query
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Remove constraint not null to null
ALTER TABLE 'test' CHANGE COLUMN 'testColumn' 'testColumn' datatype NULL;
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JUnit assertEquals(double expected, double actual, double epsilon) [duplicate]
....0) equals 3.0 in contrary to the original behavior which tells NaN. In my test cases assertEquals(double,double) is the desired thing and I don't get why it got deprecated. Sometimes you can expect punctual results even when you use float or double. </rant>
– Notinlist
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Should I use “hasClass” before “addClass”? [duplicate]
...s worth, there is a performance improvement with .hasClass() in my limited testing: http://jsperf.com/jquery-hasclass-vs-addclass-and-removeclass
However, even when standalone .removeClass() reports several times slower in Chrome, it comes in at approximately 70,000 operations a second.
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How to merge images in command line? [closed]
...me comparison of merging 12 images:
time convert image{1..12}.jpg -append test.jpg
real 0m3.178s
user 0m3.850s
sys 0m0.376s
time gm convert image{1..12}.jpg -append test.jpg
real 0m1.912s
user 0m2.198s
sys 0m0.766s
GraphicsMagick is almost twice as fast as ImageMagick.
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What is the list of possible values for navigator.platform as of today? [closed]
...nformation and release dates where applicable.
Android
It's really hard to test for Android devices. Android devices will return Android just as often as some version of Linux. For example on a Nexus 5 phone, both the Android browser and Chrome return Linux armv7l. In rare cases Android devices can ...
Deleting all records in a database table
...dels attached to it you can do:
rake db:purge
you can also do it on the test database
rake db:test:purge
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How can I give the Intellij compiler more heap space?
... my case the error was caused by the insufficient memory allocated to the "test" lifecycle of maven. It was fixed by adding <argLine>-Xms3512m -Xmx3512m</argLine> to:
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupI...