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MySQL Creating tables with Foreign Keys giving errno: 150
... CONSTRAINT's ON DELETE rule is SET NULL make sure the foreign key can actually be NULL! I spent 30 minutes reading this answer over and over, making sure my tables met the conditions but still getting Error 150. Then I noticed my FK was a NOT NULL field meaning the rule was impossible to apply.
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Html code as IFRAME source rather than a URL
...e srcdoc-polyfill library only for them and the "pure" srcdoc attribute in all non-IE/Edge browsers (check caniuse.com to be sure).
<iframe srcdoc="<html><body>Hello, <b>world</b>.</body></html>"></iframe>
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add a string prefix to each value in a string column using Pandas
...map :
df['col'].map('str{}'.format)
It will apply the word "str" before all your values.
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App Inventor 2 中的响应式设计 · App Inventor 2 中文网
...nes with a different screen size. Making apps that have this property is called responsive design.
A common approach to responsive design is to build apps that include multiple layouts and multiple images to accommodate different screen sizes and resolutions. This gives good results, but it makes...
How do I make a fully statically linked .exe with Visual Studio Express 2005?
...g any other libraries you may need to tell the linker to ignore the dynamically linked CRT explicitly.
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Open a buffer as a vertical split in VIM
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I like that this command allows N to be autocompleted (which doesn't seem possible with the command in the other answer). Both upvoted, nevertheless.
– David Rivers
Jul 29 '15 at 21:44
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How to compare dates in datetime fields in Postgresql?
...ime (i.e: 2013-05-03 12:20:00). This column has the value as timestamp for all rows currently and have the same date part(2013-05-03) but difference in time part.
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Why does 0.ToString(“#.##”) return an empty string instead of 0.00 or at least 0?
...nterestingly, if you do this: 0.ToString("#.0#"); you get: .0
If you want all three digits: 0.ToString("0.00"); produces: 0.00
From the comments to this answer, your argument seems to be,
it should show '0', because why would anyone ever want to see an empty string if the numeric value is 0?...
Why doesn't println! work in Rust unit tests?
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@Nashenas, the option is called nocapture, not no-capture.
– Vladimir Matveev
Jul 16 '15 at 5:21
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Revert a range of commits in git
...g for:
git revert B^..D
B^ means "the first parent commit of B": that allows to include B in the revert.
See "git rev-parse SPECIFYING REVISIONS section" which include the <rev>^, e.g. HEAD^ syntax: see more at "What does the caret (^) character mean?")
Note that each reverted commit is ...