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Why do I get AttributeError: 'NoneType' object has no attribute 'something'?
... is unlikely to be the problem; it's going to be foo = something() and you don't realize something() might return None when it doesn't succeed or the result set was empty or whatever.
– tripleee
Feb 4 '19 at 8:02
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How do I import other TypeScript files?
When using the TypeScript plugin for vs.net, how do I make one TypeScript file import modules declared in other TypeScript files?
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Wait for a process to finish
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Who would have known that tail would do this.
– ctrl-alt-delor
Jul 30 '17 at 15:06
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How do I hide a menu item in the actionbar?
...ns null for item and that's causing the crash. What you need instead is to do:
MenuItem item = menu.findItem(R.id.addAction);
Here is the sequence in which you should call:
first call invalidateOptionsMenu() and then inside onCreateOptionsMenu(Menu) obtain a reference to the MenuItem (by calling ...
How do shift operators work in Java? [duplicate]
...ring(2 << 33));
Now, int is of 4 bytes,hence 32 bits. So when you do shift by 33, it's equivalent to shift by 1. Hence : 100
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Remove tracking branches no longer on remote
...rself the opportunity to edit the list before deleting branches, you could do the following in one line:
git branch --merged >/tmp/merged-branches && \
vi /tmp/merged-branches && xargs git branch -d </tmp/merged-branches
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Android: When should I use a Handler() and when should I use a Thread?
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If whatever you are doing is "heavy" you should be doing it in a Thread. If you do not explicitly start it in its own thread, then it will run on the main (UI) thread which may be noticeable as jittery or slow to respond interface by your users....
How to change the Push and Pop animations in a navigation based app
...I want to change the animation of the push and pop animations. How would I do that?
25 Answers
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How do I prevent a parent's onclick event from firing when a child anchor is clicked?
...n an anchor both click events are firing (for the div and the anchor). How do I prevent the div's onclick event from firing when an anchor is clicked?
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Deleting DataFrame row in Pandas based on column value
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Will this cost more memory if df is large? Or, can I do it inplace?
– ziyuang
May 8 '15 at 13:21
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