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Mod of negative number is melting my brain
I'm trying to mod an integer to get an array position so that it will loop round. Doing i %
arrayLength works fine for positive numbers but for negative numbers it all goes wrong.
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What are static factory methods?
What's a "static factory" method?
14 Answers
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How Can I Set the Default Value of a Timestamp Column to the Current Timestamp with Laravel Migratio
I would like to make a timestamp column with a default value of CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP using the Laravel Schema Builder/Migrations. I have gone through the Laravel documentation several times, and I don't see how I can make that the default for a timestamp column.
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retrieve links from web page using python and BeautifulSoup [closed]
How can I retrieve the links of a webpage and copy the url address of the links using Python?
16 Answers
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How do you display a Toast from a background thread on Android?
How can I display Toast messages from a thread?
11 Answers
11
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What are copy elision and return value optimization?
What is copy elision? What is (named) return value optimization? What do they imply?
4 Answers
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Invoking JavaScript code in an iframe from the parent page
Basically, I have an iframe embedded in a page and the iframe has some JavaScript routines I need to invoke from the parent page.
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Group by multiple columns in dplyr, using string vector input
I'm trying to transfer my understanding of plyr into dplyr, but I can't figure out how to group by multiple columns.
9 Answ...
In a Bash script, how can I exit the entire script if a certain condition occurs?
I'm writing a script in Bash to test some code. However, it seems silly to run the tests if compiling the code fails in the first place, in which case I'll just abort the tests.
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How to create a .gitignore file
I need to add some rules to my .gitignore file. However, I can't find it in my project folder. Isn't it created automatically by Xcode? If not, what command allows me to create one?
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