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How do I search for an object by its ObjectId in the mongo console?
...ay to change your "scope" or something at the command line and not really know it?
– jcollum
Nov 22 '11 at 20:36
No wo...
Altering a column: null to not null
...semantics of NULL can have a few meanings. One of the common meaning is UNKNOWN. Take SCORE as an example. A null SCORE and a ZERO SCORE is a world of difference! Before you did the above recommendations. Make sure you application does not take null in its business logic.
– Tec...
How to find where a method is defined at runtime?
..., after a series of commits had occurred, a backend process failed to run. Now, we were good little boys and girls and ran rake test after every check-in but, due to some oddities in Rails' library loading, it only occurred when we ran it directly from Mongrel in production mode.
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What exactly does git rebase --skip do?
...s the commit still showing up in the log? And why does the missing commit now show up in the diff?
– mrwooster
Mar 2 '12 at 19:39
3
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How to copy in bash all directory and files recursive?
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@AnneTheAgile - from my tests just now and according to the man pages, -r and -R don't differ.
– aaaaaa
Jan 25 '15 at 2:54
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JavaScript, elegant way to check nested object properties for null/undefined [duplicate]
a "problem" which i have every now and then is that i have an object e.g. user = {} and through the course of using the app this gets populated. Let's say somwhere, after an AJAX call or something i do this:
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“Invalid form control” only in Google Chrome
...s shown as expected.
I believe this is a bug in Chrome: my workaround for now was to come up with an initial/default value.
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How to save a Python interactive session?
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reinteract is now superseded by the IPython Notebook and QtConsole.
– Eric O Lebigot
Jan 26 '14 at 17:17
How to use Python's pip to download and keep the zipped files for a package?
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pip install --download in now deprecated, and will be removed from pip 10. pip.pypa.io/en/latest/reference/pip_download/#overview. Use pip download somepackage.
– Sнаđошƒаӽ
Dec 20 '15 at 5:26
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sql query to return differences between two tables
...JOIN B ON (A.C = B.C)
WHERE A.C IS NULL OR B.C IS NULL
What you need to know in this case is, that when a record can be found in A, but not in B, than the columns which come from B will be NULL, and similarly for those, which are present in B and not in A, the columns from A will be null.
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