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Remove by _id in MongoDB console
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Very close. This will work:
db.test_users.deleteOne( {"_id": ObjectId("4d512b45cc9374271b02ec4f")});
i.e. you don't need a new for the ObjectId.
Also, note that in some drivers/tools, remove() is now deprecated and deleteOne or deleteMany should ...
Remove all elements contained in another array
I am looking for an efficient way to remove all elements from a javascript array if they are present in another array.
14 A...
How to ignore certain files in Git
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The problem is that .gitignore ignores just files that weren't tracked before (by git add). Run git reset name_of_file to unstage the file and keep it. In case you want to also remove the given file from the repository (after pushing), use git rm --cached name_of_file.
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Can't find the 'libpq-fe.h header when trying to install pg gem
I am using the Ruby on Rails 3.1 pre version. I like to use PostgreSQL, but the problem is installing the pg gem. It gives me the following error:
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Get folder name from full file path
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Peter Mortensen
26.5k2121 gold badges9292 silver badges122122 bronze badges
answered Mar 8 '11 at 6:54
Alex PacurarAlex P...
Split an NSString to access one particular piece
I have a string like this: @"10/04/2011" and I want to save only the "10" in another string. How can I do that?
7 Answers...
cv2.imshow command doesn't work properly in opencv-python
...ple code created a window of the correct name, but its content is just blank and doesn't show the image:
15 Answers
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How do I tell CPAN to install all dependencies?
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Here is the one-liner making these changes permanent including automatic first-time CPAN configuration:
perl -MCPAN -e 'my $c = "CPAN::HandleConfig"; $c->load(doit => 1, autoconfig => 1); $c->edit(prerequisites_policy => "follow"); $...
Why does Math.round(0.49999999999999994) return 1?
... precisely this one pathological case.2 Java 7 no longer mandates this broken implementation.3
The problem
0.5+0.49999999999999994 is exactly 1 in double precision:
static void print(double d) {
System.out.printf("%016x\n", Double.doubleToLongBits(d));
}
public static void main(String args[...
I get exception when using Thread.sleep(x) or wait()
...Aug 6 '14 at 17:35
Eric Leschinski
114k4949 gold badges368368 silver badges313313 bronze badges
answered Jul 27 '10 at 10:31
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