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Stop Mongoose from creating _id property for sub-document array items
...ose");
var subSchema = mongoose.Schema({
//your subschema content
},{ _id : false });
var schema = mongoose.Schema({
// schema content
subSchemaCollection : [subSchema]
});
var model = mongoose.model('tablename', schema);
...
Constructor function vs Factory functions
...an't forget new with a class constructor, or the constructor will throw an error.
If you do the instanceof check, it leaves ambiguity as to whether or not new is required. In my opinion, it shouldn't be. You've effectively short circuited the new requirement, which means you could erase drawback #1....
Best GWT widget library? [closed]
....
– Charles Kendrick
Dec 2 '10 at 1:05
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How do I remove/delete a virtualenv?
...em to set up the environment in the first place, which would usually be an error.
– tripleee
Apr 13 '19 at 14:40
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Python syntax for “if a or b or c but not all of them”
...'x', 'y', 'z'])
args = parser.parse_args()
if len(args.abc) != 3:
parser.error('expected 3 arguments')
print(args.abc)
Here are some usage examples:
# default case
wim@wim-zenbook:/tmp$ ./three_or_none.py
['x', 'y', 'z']
# explicit case
wim@wim-zenbook:/tmp$ ./three_or_none.py 1 2 3
['1', '2'...
What's the difference between echo, print, and print_r in PHP?
I use echo and print_r much, and almost never use print .
11 Answers
11
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How do I include related model fields using Django Rest Framework?
...m (which this example does not show). In the second solution I received an error - "'Classroom' object has no attribute 'teachers'" . Am I missing something?
– Chaz
Jan 29 '13 at 13:12
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`require': no such file to load — mkmf (LoadError)
...
I got the similar error when install bundle
sudo apt-get install ruby-dev
Works great for me and solve the problem
Mint 16 ruby1.9.3
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How to redirect output of an entire shell script within the script itself?
...nal, standard input is also writable and both standard output and standard error are readable by virtue (or is it 'vice'?) of a historical quirk: the terminal is opened for reading and writing and the same open file description is used for all three standard I/O file descriptors.
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What are the differences between the threading and multiprocessing modules?
...nd a thread pool like this:
with concurrent.futures.ThreadPoolExecutor(max_workers=4) as executor:
executor.submit(job, argument)
executor.map(some_function, collection_of_independent_things)
# ...
You can even get the results of those jobs and pass them on to further jobs, wait for t...