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Check if null Boolean is true results in exception
...r null as any other object.
In your particular case, your Boolean is null and the if statement triggers an implicit conversion to boolean that produces the NullPointerException. You may need instead:
if(bool != null && bool) { ... }
...
update package.json version automatically
Before I do a small release and tag it, I'd like to update the package.json to reflect the new version of the program.
11 A...
How can I display a JavaScript object?
...ma in the log method, then the first line of the output will be the string and after that the object will be rendered:
console.log('My object: ', obj);
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How do I sort an array of hashes by a value in the hash?
...version by requiring my backports gem too :-)
– Marc-André Lafortune
Jul 1 '10 at 4:19
Hi, is there a way to sort in ...
Getting reference to the top-most view/window in iOS application
...IAlertView. When I init the manager that listens for NSNotification events and adds views in response, I need to get a reference to the top-most view in the application. This is what I have at the moment:
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Choose between ExecutorService's submit and ExecutorService's execute
...
There is a difference concerning exception/error handling.
A task queued with execute() that generates some Throwable will cause the UncaughtExceptionHandler for the Thread running the task to be invoked. The default UncaughtExceptionHandler, which typically prints the Thro...
Convert a date format in PHP
... in SQL); however I don't know how the date function requires a timestamp, and I can't get a timestamp from this string.
17...
How are POST and GET variables handled in Python?
In PHP you can just use $_POST for POST and $_GET for GET (Query string) variables. What's the equivalent in Python?
6 ...
What does the ^ operator do in Java?
...--- xor
3 = 011
This the truth table for bitwise (JLS 15.22.1) and logical (JLS 15.22.2) xor:
^ | 0 1 ^ | F T
--+----- --+-----
0 | 0 1 F | F T
1 | 1 0 T | T F
More simply, you can also think of xor as "this or that, but not both!".
See also
Wikipedia: exclusive-...
Does Django scale? [closed]
...e a list of Django sites on the front page of the main Django project page and then a list of Django built sites at djangosites.org. Going through the lists and picking some that I know have decent traffic we see:
Instagram: What Powers Instagram: Hundreds of Instances, Dozens of Technologies.
Pi...