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Easiest way to check for an index or a key in an array?
...
To check if the element is set (applies to both indexed and associative array)
[ ${array[key]+abc} ] && echo "exists"
Basically what ${array[key]+abc} does is
if array[key] is set, return abc
if array[key] is not set, return nothing
Ref...
Having Django serve downloadable files
...f), but the actual file serving is handled by Apache/Lighttpd. Once you've set up mod_xsendfile, integrating with your view takes a few lines of code:
from django.utils.encoding import smart_str
response = HttpResponse(mimetype='application/force-download') # mimetype is replaced by content_type f...
Tablet or Phone - Android
...values/screen.xml (assuming res/layout/ contains your layout files for handsets)
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="screen_type">phone</string>
</resources>
File res/values-sw600dp/screen.xml (assuming res/layout-sw600dp/ contains you...
multiple prints on the same line in Python
...E]")
The print function accepts an end parameter which defaults to "\n". Setting it to an empty string prevents it from issuing a new line at the end of the line.
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Concatenating string and integer in python
...well with print but cannot be assigned to a variable as a string. It gives Set object.
– specialscope
Jul 19 '12 at 10:49
2
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“for” vs “each” in Ruby
...require special language features.
Per Telemachus's Comment
for .. in .. sets the iterator outside the scope of the loop, so
for a in [1,2]
puts a
end
leaves a defined after the loop is finished. Where as each doesn't. Which is another reason in favor of using each, because the temp variable...
Url decode UTF-8 in Python
...s library as well:
import requests
url = "http://www.mywebsite.org/Data%20Set.zip"
print(f"Before: {url}")
print(f"After: {requests.utils.unquote(url)}")
Output:
$ python3 test_url_unquote.py
Before: http://www.mywebsite.org/Data%20Set.zip
After: http://www.mywebsite.org/Data Set.zip
Might be...
EditText maxLines not working - user can still input more lines than set
..."1"
/>
You just need to make sure you have the attribute "inputType" set. It doesn't work without this line.
android:inputType="text"
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design a stack such that getMinimum( ) should be O(1)
...inimum ( if min = 7 and you push 5, it pushes 3 instead ( 5-|7-5| = 3) and sets min to 5; if you then pop 3 when min is 5 it sees that the popped value is less than min, so reverses the procedure to get 7 for the new min, then returns the previous min). As any value which doesn't cause a change the ...
How to change fontFamily of TextView in Android
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This is the way to set the font programmatically:
TextView tv = (TextView) findViewById(R.id.appname);
Typeface face = Typeface.createFromAsset(getAssets(),
"fonts/epimodem.ttf");
tv.setTypeface(face);
put the font file in your a...