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Test if characters are in a string
...try to match on an invalid regex, it doesn't work:
> grep("[", "abc[")
Error in grep("[", "abc[") :
invalid regular expression '[', reason 'Missing ']''
To do a true substring test, use fixed = TRUE.
> grep("[", "abc[", fixed = TRUE)
[1] 1
If you do want regex, great, but that's not w...
Linux: copy and create destination dir if it does not exist
...o/bar if /foo doesn't already exist. (Without -p, it will instead throw an error.
The && list operator, as documented in the POSIX standard (or the Bash manual if you prefer), has the effect that cp myfile.txt $_ only gets executed if mkdir -p /foo/bar executes successfully. This means the ...
How to set the holo dark theme in a Android app?
...there's only Holo.Light, that's why you are getting the resource not found error.
So just set it to:
<style name="AppTheme" parent="android:Theme.Holo" />
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Why can I access TypeScript private members when I shouldn't be able to?
...unctions are only accessible inside the class. Like
And it will show an error when you try to access a private member. Here is the example:
Note: It will be fine with javascript and both function are accessible
outside.
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What is __init__.py for?
...e from datetime import datetime;datetime.now(). You should get an AttributeError (because it is importing your blank file now). If you were to repeat these steps without creating the blank init file, this would not happen. That's what it's intended to prevent.
– Two-Bit Alchemi...
How to parse a JSON string into JsonNode in Jackson?
... (in org.codehaus.jackson.map) which knows where to find ObjectMapper. The error you got was because the regular JsonFactory (from core package) has no dependency to ObjectMapper (which is in the mapper package).
But usually you just use ObjectMapper and do not worry about JsonParser or other low l...
TypeScript or JavaScript type casting
...eturn it. You can't modify the type1 and return, or you get a "Can't cast" error.
– Tony Gutierrez
Jul 5 '18 at 12:50
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What is the convention for word separator in Java package names?
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Yes, using a hyphen is bad practice, because it is an error. And writing code that doesn't compile is indeed bad practice.
– glglgl
May 26 '17 at 7:01
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What is the best way to exit a function (which has no return value) in python before the function en
...d then sys.exit() if you want to exit but report success or sys.exit("some error message to print to stderr").
– Boris
Mar 4 at 17:07
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Launch custom android application from android browser
...is is that if the user doesn't have the app installed, they'll get a nasty error. And I'm not sure there's any way to check.
Edit: To answer your question, you can use getIntent().getData() which returns a Uri object. You can then use Uri.* methods to extract the data you need. For example, let's...