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How update the _id of one MongoDB Document?
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If you get a duplicate key error in the insert line and aren't worried about the problem @skelly mentioned, the simplest solution is to just call the remove line first and then call the insert line. The doc should already printed on your screen so it'd...
Why is there a difference in checking null against a value in VB.NET and C#?
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Why answer the question by trial and error? Should be possible to do it from the language specifications.
– David Heffernan
Mar 20 '13 at 12:59
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Output array to CSV in Ruby
...y this, it'll default to "rb" (read-only binary mode) and you would get an error when trying to add to your csv file. See ruby-doc.org/core-1.9.3/IO.html for a list of valid file modes in Ruby.
– Dylan Markow
Jul 16 '12 at 14:08
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Why do people write the #!/usr/bin/env python shebang on the first line of a Python script?
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File "./my_script.py", line 2, in <module>
import json
ImportError: No module named json
The json module doesn't exist in Python 2.5.
One way to guard against that kind of problem is to use the versioned python command names that are typically installed with most Pythons:
$ cat my_...
Is there any way in C# to override a class method with an extension method?
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Why don't you get a compiler error then? E.g. I type. namespace System { public static class guilty { public static string ToLower(this string s) { return s.ToUpper() + " I'm Malicious"; } } }
– LowLevel
Jun 9 '18 a...
Static variables in JavaScript
...property is read-only and cannot be modified (be aware you will not get an error if you try to set it, but it has no effect). Each property has the attributes writable, configurable (allow to change after declaration) and enumerable (allow to use it as enumerator), which are per default false. You c...
What's the difference between ASCII and Unicode?
...bits? But why not 1 byte (8 bits)?
The last bit (8th) is used for avoiding errors as parity bit.
This was relevant years ago.
Most ASCII characters are printable characters of the alphabet such as abc, ABC, 123, ?&!, etc. The others are control characters such as carriage return, line feed, tab...
What's the best way to join on the same table twice?
...uently so. Updating your database when that change happens will be a HUGE, error-prone headache. *
Method 1 as you describe it is your best bet though. It looks a bit terse due to the naming scheme and the short aliases but... aliasing is your friend when it comes to joining the same table multiple...
Insert a commit before the root commit in Git?
... I had to change rebase command to git rebase newroot master, because of error.
– marbel82
Jul 24 '19 at 23:11
@anto...
Getters \ setters for dummies
... this.bar = value; } }; foo.bar = 456; Raises an exception: Uncaught RangeError: Maximum call stack size exceeded at Object.set bar [as bar] (<anonymous>:4:32) at Object.set bar [as bar] (<anonymous>:4:32) at Object.set bar [as bar] (<anonymous>:4:32) at Object.set...