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What is the difference between save and insert in Mongo DB?
...orms an update, replacing all field in the existing record with the fields from the document.
Save vs Update :
update modifies an existing document matched with your query params. If there is no such matching document, that's when upsert comes in picture.
upsert : false : Nothing happens when no ...
Where can I find my .emacs file for Emacs running on Windows?
...
Copy and pasted from the Emacs FAQ, http://www.gnu.org/software/emacs/windows/:
Where do I put my init file?
On Windows, the .emacs file may be called _emacs for backward compatibility with DOS and FAT filesystems where filenames could not...
Creating a DateTime in a specific Time Zone in c#
...eTime GmtToPacific(DateTime dateTime)
{
return TimeZoneInfo.ConvertTimeFromUtc(dateTime,
TimeZoneInfo.FindSystemTimeZoneById("Pacific Standard Time"));
}
Oddly enough, although "Pacific Standard Time" normally means something different from "Pacific Daylight Time," in this case it refe...
Breakpoint on property change
...a Fiddler if you can't edit the source manually); sadly, functions defined from Firebug don't seem to break on debugger (or is it a matter of configuration? please correct me then), but console.log works.
Edit:
Note that in Firefox, console.watch already exists, due to Firefox's non-standard Obje...
CSV API for Java [closed]
...
The package I downloaded from SourceForge had a binary in the deploy folder.
– Mike Sickler
Jun 1 '11 at 2:29
8
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The command rbenv install is missing
...
The install command is not embedded into rbenv, it comes from the ruby-build plugin. You can install it using the command:
git clone https://github.com/rbenv/ruby-build.git "$(rbenv root)"/plugins/ruby-build
On Mac OS X you can install it through homebrew:
brew install ruby-bui...
Numpy - add row to array
... = array([[0, 1, 2], [1, 2, 0], [2, 1, 2], [3, 2, 0]])
add to A all rows from X where the first element < 3:
import numpy as np
A = np.vstack((A, X[X[:,0] < 3]))
# returns:
array([[0, 1, 2],
[0, 2, 0],
[0, 1, 2],
[1, 2, 0],
[2, 1, 2]])
...
Python Progress Bar
... a progress meter to your loops in a second:
In [1]: import time
In [2]: from tqdm import tqdm
In [3]: for i in tqdm(range(10)):
....: time.sleep(3)
60%|██████ | 6/10 [00:18<00:12, 0.33 it/s]
Also, there is a graphical version of tqdm since v2.0.0 (d977a0c):
In [1]:...
How can I clear or empty a StringBuilder? [duplicate]
...ngth to zero. The remaining allocations are still there. This answer stems from the javascript length = 0 for arrays, which performs a magical operation to mark the array reusable, but even there i am not sure, and don't trust it. The underlying array will never be garbage collected.
...
How to delete a folder with files using Java
...elf. Symlinks are just an example of things you'll miss writing everything from scratch.
– 9ilsdx 9rvj 0lo
Mar 22 '18 at 7:31
2
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