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How to JSON serialize sets?
...perset of JSON. All legal JSON now is legal YAML. yaml.org/spec/1.2/spec.html
– steveha
Oct 16 '14 at 0:21
...
how to emulate “insert ignore” and “on duplicate key update” (sql merge) with postgresql?
...tion: http://www.postgresql.org/docs/9.3/static/plpgsql-control-structures.html, example 40-2 right at the bottom.
That's usually the easiest way. You can do some magic with rules, but it's likely going to be a lot messier. I'd recommend the wrap-in-function approach over that any day.
This works ...
How to check for an active Internet connection on iOS or macOS?
...ow (2018) a bad choice. It now redirects to Apple.com which is a > 40kB html file. Back to google.com - it is only 11kB. BTW google.com/m is same size but is reported to be slower by 120 msec.
– BlueskyMed
Dec 9 '18 at 17:31
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Is errno thread-safe?
...s that errno be threadsafe.
See http://www.unix.org/whitepapers/reentrant.html
In POSIX.1, errno is defined as an
external global variable. But this
definition is unacceptable in a
multithreaded environment, because its
use can result in nondeterministic
results. The problem is that t...
Why no generics in Go?
...w.jetbrains.com/help/go/how-to-use-type-parameters-for-generic-programming.html.
package main
import "fmt"
func PrintSlice(type T)(s []T) {
for _, v := range s {
fmt.Print(v)
}
}
func main() {
PrintSlice([]int{1, 2, 3, 4, 5, 6, 7, 8, 9})
PrintSlice([]string{"a", "b", "c",...
Including JavaScript class definition from another file in Node.js
...');
var User = userFile.User;
http://nodejs.org/docs/v0.4.10/api/globals.html#require
Another way is:
global.User = User;
then this would be enough in server.js:
require('./user.js');
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Increasing client_max_body_size in Nginx conf on AWS Elastic Beanstalk
...o learn more about reloading, see http://nginx.org/en/docs/beginners_guide.html.
In a previous version of Elastic Beanstalk, I was able to add a container_command to accomplish this, but now I am finding, like @cdmckay, that this causes a deployment failure. If you rebuild your environment it will...
Postgres unique constraint vs index
... concurrently a unique index. postgresql.org/docs/9.3/static/sql-dropindex.html "There are several caveats to be aware of when using this option. Only one index name can be specified, and the CASCADE option is not supported. (Thus, an index that supports a UNIQUE or PRIMARY KEY constraint cannot be ...
Redirect all to index.php using htaccess
... but not on will cause problems https://httpd.apache.org/docs/2.4/mod/core.html#allowoverride)
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Remove border radius from Select tag in bootstrap 3
...r from the select element and creating a wrapper span which has a border.
html:
<span class="select-wrapper">
<select class="form-control no-radius">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3&...