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Heroku free account limited?
...e on free hosting, but I'm planning to move to use git-based blog engine(Jekyll, Toto) on Ruby platform. Then I see Heroku provides free account features, but I don't see any detail on bandwidth, disk spaces, requests?
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Disable ONLY_FULL_GROUP_BY
I accidentally enabled ONLY_FULL_GROUP_BY mode like this:
26 Answers
26
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parseInt vs unary plus, when to use which?
...wer for a more complete set of cases
Well, here are a few differences I know of:
An empty string "" evaluates to a 0, while parseInt evaluates it to NaN. IMO, a blank string should be a NaN.
+'' === 0; //true
isNaN(parseInt('',10)); //true
The unary + acts more like parseFloat...
What's the valid way to include an image with no src?
...I want the image tag to exist at pageload but just not display anything. I know <img src='' /> is invalid so what's the best way to do this?
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How do I use vi keys in ipython under *nix?
...ndering in here recently, IPython 5.0 switched from readline to prompt_toolkit, so an updated answer to this question is to pass an option:
$ ipython --TerminalInteractiveShell.editing_mode=vi
... or to set it globally in the profile configuration (~/.ipython/profile_default/ipython_config.py; cr...
How to tell if rails is in production?
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Dan McNevinDan McNevin
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How to print a date in a regular format?
...ature (as a data). It can be get using the repr() function and is handy to know what kind of data your manipulating while you are developing or debugging. repr(datetime.datetime(2008, 11, 22, 19, 53, 42)) gives you 'datetime.datetime(2008, 11, 22, 19, 53, 42)'.
What happened is that when you have ...
what is .netrwhist?
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netrw is a kind of vim plugin/script which supports reading and writing files across networks. .netrwhist is a history file which maintains all the directories that were modified. So whenever you modify the contents of ~/.vim it adds on...
What does the “assert” keyword do? [duplicate]
...reported" means that an AssertionError is thrown.
And finally, a lesser known feature of assert:
You can append : "Error message" like this:
assert d != null : "d is null";
to specify what the error message of the thrown AssertionError should be.
This post has been rewritten as an article ...
In Vim/Vi, how do you move the cursor to the end of the previous word?
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Unfortunately it's not a single key... but ge is what you're looking for, I think.
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