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mongodb: insert if not exists
... This is almost what I want ! How can I not touch the insertion_date field if the object is already present ?
– LeMiz
May 27 '10 at 21:24
28
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How to use the C socket API in C++ on z/OS
...nnect() API. When I do that, this is what I see:
FORMAT
X/Open
#define _XOPEN_SOURCE_EXTENDED 1
#include <sys/socket.h>
int connect(int socket, const struct sockaddr *address, socklen_t address_len);
Berkeley Sockets
#define _OE_SOCKETS
#include <sys/types.h>
#include <sys/soc...
C# “internal” access modifier when doing unit testing
...Include="System.Runtime.CompilerServices.InternalsVisibleTo">
<_Parameter1>MyTests</_Parameter1>
</AssemblyAttribute>
</ItemGroup>
Or if you have one test project per project to be tested, you could do something like this in your Directory.Build.props file:
&l...
How can I debug git/git-shell related problems?
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For even more verbose output use following:
GIT_CURL_VERBOSE=1 GIT_TRACE=1 git pull origin master
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How to manually expand a special variable (ex: ~ tilde) in bash
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+1 -- I was needing to expand ~$some_other_user and eval works fine when $HOME will not work because I don't need the current user home.
– olivecoder
Sep 10 '13 at 11:30
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Calling shell functions with xargs
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Exporting the function should do it (untested):
export -f echo_var
seq -f "n%04g" 1 100 | xargs -n 1 -P 10 -I {} bash -c 'echo_var "$@"' _ {}
You can use the builtin printf instead of the external seq:
printf "n%04g\n" {1..100} | xargs -n 1 -P 10 -I {} bash -c 'echo_var "$@"' _ {}
...
Getting a random value from a JavaScript array
...u've already got underscore or lodash included in your project you can use _.sample.
// will return one item randomly from the array
_.sample(['January', 'February', 'March']);
If you need to get more than one item randomly, you can pass that as a second argument in underscore:
// will return tw...
Verify version of rabbitmq
...n Windows this is very similar. "C:\Program Files\RabbitMQ Server\rabbitmq_server-3.6.5\sbin\rabbitmqctl status" Folder name may vary with your version of Rabbit.
– dylanT
Nov 10 '16 at 23:58
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Storing time-series data, relational or non?
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Create a file, name it 1_2.data. weired idea? what you get:
You save up to 50% of space because you don't need to repeat the fk_to_device and fk_to_metric value for every data point.
You save up even more space because you don't need any indices.
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Does SQLAlchemy have an equivalent of Django's get_or_create?
...ortcut readily available AFAIK.
You could generalize it ofcourse:
def get_or_create(session, model, defaults=None, **kwargs):
instance = session.query(model).filter_by(**kwargs).first()
if instance:
return instance, False
else:
params = dict((k, v) for k, v in kwargs.it...