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How to change the type of a field?
I am trying to change the type of a field from within the mongo shell.
14 Answers
14
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Referring to the null object in Python
...is a built-in constant. As soon as you start Python, it's available to use from everywhere, whether in module, class, or function. NoneType by contrast is not, you'd need to get a reference to it first by querying None for its class.
>>> NoneType
NameError: name 'NoneType' is not defined
&g...
Datetime - Get next tuesday
....DayOfWeek + 7) % 7) + 1;
... or you could use the original formula, but from tomorrow:
DateTime tomorrow = DateTime.Today.AddDays(1);
// The (... + 7) % 7 ensures we end up with a value in the range [0, 6]
int daysUntilTuesday = ((int) DayOfWeek.Tuesday - (int) tomorrow.DayOfWeek + 7) % 7;
DateT...
Symbolic link to a hook in git
...k changes in .git/hooks), somewhere I read that I can make a symbolic link from hooks to .git/hooks so I don't have to copy the file from one folder to the other every time someone changes it so I tried:
...
How do I parse command line arguments in Bash?
...mp/demo-space-separated.sh -e conf -s /etc -l /usr/lib /etc/hosts
output from copy-pasting the block above:
FILE EXTENSION = conf
SEARCH PATH = /etc
LIBRARY PATH = /usr/lib
DEFAULT =
Number files in SEARCH PATH with EXTENSION: 14
Last line of file specified as non-opt/last argumen...
Globally catch exceptions in a WPF application?
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@PitiOngmongkolkul: The handler is called as event from you main loop. When the event handlers returns, your app continues normally.
– David Schmitt
Jul 9 '13 at 13:17
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How to tell where a header file is included from?
... answer. Only unfortunate problem is that I couldn't get it to stop Clang from trying to compile the file normally, so I ended up using clang++ -MM -H (which is a slightly useful combination).
– rookie1024
Feb 17 '17 at 17:36
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Recreating a Dictionary from an IEnumerable
...%3a%2f%2fstackoverflow.com%2fquestions%2f2636603%2frecreating-a-dictionary-from-an-ienumerablekeyvaluepair%23new-answer', 'question_page');
}
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Post as a guest
...
classical inheritance vs prototypal inheritance in javascript
...tion is defined as "a general concept formed by extracting common features from specific examples". However for the sake of this explanation we're going to use the aforementioned definition instead.
Now some objects have a lot of things in common. For example a mud bike and a Harley Davidson have a...
How default .equals and .hashCode will work for my classes?
...the default implementation is Object's (generally speaking; if you inherit from a class that redefined equals and/or hashCode, then you'll use that implementation instead).
From the documentation:
equals
The equals method for class Object implements the most discriminating possible equivalence...