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How to Update Multiple Array Elements in mongodb
...n the search result to just those that match the conditions for the update selection:
db.collection.aggregate([
{ "$match": { "events.handled": 1 } },
{ "$project": {
"events": {
"$setDifference": [
{ "$map": {
"input": "$events",
...
How to run only one task in ansible playbook?
...
Yes, there is. To be specific, one way to selectively run plays now is by "tagging" the plays. There may be OTHER ways to limit the plays also; I am still learning...
– Scott Prive
May 2 '19 at 1:55
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Are there benefits of passing by pointer over passing by reference in C++?
...ng reference in C? I am using codeblock (mingw) latest version and in that selecting a C project. Still passing by reference (func (int& a)) works. Or is it available in C99 or C11 onwards?
– Jon Wheelock
Oct 12 '15 at 1:18
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Android: textColor of disabled button in selector not showing?
I am trying to make a button with a selector my button can have the following states:
5 Answers
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Finding the index of elements based on a condition using python list comprehension
...x <= 2]
Matlab supplies find because its array-centric model works by selecting items using their array indices. You can do this in Python, certainly, but the more Pythonic way is using iterators and generators, as already mentioned by @EliBendersky.
...
How do I get a background location update every n minutes in my iOS application?
...following:
Go to Project -> Capabilities -> Background Modes -> select Location updates
Go to Project -> Info -> add a key NSLocationAlwaysUsageDescription with empty value (or optionally any text)
To make location working when your app is in the background and send coordinates to w...
Rails: FATAL - Peer authentication failed for user (PG::Error)
...o check the version of postgres if multiple versions are available
psql=# select VERSION();
PostgreSQL 9.1.13 on x86_64-unk.... # so version is 9.1
Now Open postgres user
vim /etc/postgresql/9.1/main/pg_hba.conf
9.1 is version return form upper command
and replace
local all ...
How to handle multiple cookies with the same name?
... spec. Thus you are more or less correct in your assumption that you could select the first value.
Unfortunately the language used in RFCs is extremely specific - the use of the words SHOULD and SHOULD NOT introduce ambiguity in RFCs. These indicate conventions that should be followed, but are not ...
Combining Multiple Commits Into One Prior To Push
...commit: Add feature
b860ddb HEAD@{2}: commit: Add something
Reset to your selected head (I have chosen HEAD@{2})
git reset b860ddb --soft
git status (just to be sure)
Add your new commit
git commit -m "Add new commit"
Note: HEAD@{0} & HEAD@{1} Are now merged into 1 commit, this can be don...
How can I use if/else in a dictionary comprehension?
...ry for further processing like validation, or editing which we must return selected data from file back to entry widgets, etc.
The first round using traditional coding (8 lines):
entries = {'name': 'Material Name', 'maxt': 'Max Working Temperature', 'ther': {100: 1.1, 200: 1.2}}
a_dic, b_dic = {}, ...