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PostgreSQL ERROR: canceling statement due to conflict with recovery
...ndby_archive_delay and max_standby_streaming_delay to some sane value:
# /etc/postgresql/10/main/postgresql.conf on a slave
max_standby_archive_delay = 900s
max_standby_streaming_delay = 900s
This way queries on slaves with a duration less than 900 seconds won't be cancelled. If your workload req...
What is the Swift equivalent to Objective-C's “@synchronized”?
...) & objc_sync_exit(…) are public headers provided by the iOS/macOS/etc. APIs (looks like they're inside the ….sdk at the path usr/include/objc/objc-sync.h). The easiest way to find out if something is a public API or not is to (in Xcode) type the function name (e.g. objc_sync_enter(); argum...
How to find duplicates in 2 columns not 1
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great thanks, does the order that you group by matter?
– Andrew
Jan 27 '17 at 20:56
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IntelliJ IDEA hint parameters of method
...gt; Code Completion -> Autopopup in (ms)
Set it to whatever you like. Etc. 5 ms.
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Programmatically open Maps app in iOS 6
...ower code in an else statement after that if. Note that if you reverse the order of items in the openMapsWithItems: array, you'll get directions from the coordinate to your current location. You could probably use it to get directions between any two locations by passing a constructed MKMapItem inst...
How to mount a host directory in a Docker container
...gt; tuple. The --mount syntax is more verbose than -v or --volume, but the order of the keys is not significant, and the value of the flag is easier to understand.
The type of the mount, which can be bind, volume, or tmpfs. (We are going to use bind)
The source of the mount. For bind mounts, this is...
'sudo gem install' or 'gem install' and gem locations
...s will make the gems visible to gem list, uninstallable via gem uninstall, etc. without needing sudo access. Runnable scripts installed by gem or bundler can be put into your path by adding
$HOME/.gem/ruby/RUBYVERSION/bin
to your $PATH. gem itself tells you about this if it isn't set when you do ...
How to convert currentTimeMillis to a date in Java?
..."real" month as we know it. Example: 0 = January, 1 = February, 2 = March, etc.
– shagberg
Dec 7 '18 at 21:21
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Is there a quick way to delete a file from a Jar / war without having to extract the jar and recreat
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In case you want to delete file in order to unsign signed jar, you can probably just make the .RSA file zero-sized. This can be accomplished with just jar u. See https://stackoverflow.com/a/24678645/653539 . (Worked for me, though I admit it's hack.)
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How to test equality of Swift enums with associated values
... Better: case (.Name(let a), .Name(let b)) : return a == b etc.
– Martin R
Nov 6 '15 at 22:29
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