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MongoDB, remove object from array
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try..
db.mycollection.update(
{'_id': ObjectId("5150a1199fac0e6910000002")},
{ $pull: { "items" : { id: 23 } } },
false,
true
);
share
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cannot download, $GOPATH not set
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[Update: as of Go 1.8, GOPATH defaults to $HOME/go, but you may still find this useful if you want to understand the GOPATH layout, customize it, etc.]
The official Go site discusses GOPATH and how to lay out a workspace directory.
export GOPATH="$HOME/your-workspace-dir/" -- ru...
What is CDATA in HTML? [duplicate]
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All text in an XML document will be parsed by the parser.
But text inside a CDATA section will be ignored by the parser.
CDATA - (Unparsed) Character Data
The term CDATA is used about text data that should not be parsed by the XML parser.
Characters like "<" and "&...
Python debugging tips [closed]
What are your best tips for debugging Python?
18 Answers
18
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How to schedule a function to run every hour on Flask?
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You can use BackgroundScheduler() from APScheduler package (v3.5.3):
import time
import atexit
from apscheduler.schedulers.background import BackgroundScheduler
def print_date_time():
print(time.strftime("%A, %d. %B %...
Can I set an opacity only to the background image of a div?
Let's say I have
8 Answers
8
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iOS: how to perform a HTTP POST request?
I'm approaching iOS development and I'd like to have one of my first applications to perform a HTTP POST request.
7 Answers...
Combining multiple commits before pushing in Git [duplicate]
I have a bunch of commits on my local repository which are thematically similar. I'd like to combine them into a single commit before pushing up to a remote. How do I do it? I think rebase does this, but I can't make sense of the docs.
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Why can't radio buttons be “readonly”?
...doesn't work, because it doesn't submit the value (or does it?), and it grays out the radio button. Read-only is really what I'm looking for, but for some mysterious reason it doesn't work.
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Warning: Null value is eliminated by an aggregate or other SET operation in Aqua Data Studio
...blem when data is null and the warning has appear when the result is display.
How to solve this problem?. How to change the null data to 0 when no data in the table?.
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