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mongodb: insert if not exists
...psert command.
To turn your pseudocode into a working example:
now = datetime.utcnow()
for document in update:
collection.update_one(
{"_id": document["_id"]},
{
"$setOnInsert": {"insertion_date": now},
"$set": {"last_update_date": now},
},
...
@import vs #import - iOS 7
...finds in the included file into your code during compilation. This can sometimes cause significant problems. For example, imagine you have two header files: SomeFileA.h and SomeFileB.h; SomeFileA.h includes SomeFileB.h, and SomeFileB.h includes SomeFileA.h. This creates a loop, and can confuse the c...
What's the better (cleaner) way to ignore output in PowerShell? [closed]
...sure-Command {$null = $(1..1000)}
TotalMilliseconds : 0.2122
## Control, times vary from 0.21 to 0.24
Measure-Command {$(1..1000)}
TotalMilliseconds : 0.2141
So I would suggest that you use anything but Out-Null due to overhead. The next important thing, to me, would be readability. I kind of...
What is the difference between Cygwin and MinGW?
...your software, the recipient will need to run it along with the Cygwin run-time environment (provided by the file cygwin1.dll). You may distribute this with your software, but your software will have to comply with its open source license. It may even be the case that even just linking your softwa...
How to set entire application in portrait mode only?
...vices returns to landscape mode briefly inbetween the activities and needs time to handle this. Setting orientation in manifest doesn't have this effect.
– Anonymous
Nov 20 '15 at 7:22
...
Does C have a “foreach” loop construct?
...
@Judge: Well, for one thing it has “surprising” lifetime (if you're working with code which removes elements, chances are you'll crash in free()) and for another it has a reference to the value inside its definition. It's really an example of something that's just too damn cle...
Compare if two variables reference the same object in python
...point. Since small integers are failry common (-1 as an error value, 0 any time you actually index something, small numbers are usually reasonable default values) Python optimizes by preallocating small numbers (-5 to 256) and reuses the same integer object. Thus your example only works for numbers ...
Getters \ setters for dummies
...ed, but still widely used around the web and thus unlikely to disappear anytime soon. It works on all browsers except IE 10 and below. Though the other options also work well on non-IE, so this one isn't that useful.
var foo = { _bar : 123; }
foo.__defineGetter__( 'bar', function(){ return this._ba...
Setting the correct encoding when piping stdout in Python
...f-8')
It's not practical to explicitly print with a given encoding every time. That would be repetitive and error-prone.
A better solution is to change sys.stdout at the start of your program, to encode with a selected encoding. Here is one solution I found on Python: How is sys.stdout.encoding c...
Angular HttpPromise: difference between `success`/`error` methods and `then`'s arguments
...nce of handling specifically (and not http request handling). I had a hard time understanding this until I took close look.
– jimmont
Sep 17 '14 at 5:50
...