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Fast way to discover the row count of a table in PostgreSQL
... than the limit anyway (like with ORDER BY something while it can't use an index, or with aggregate functions). Apart from that, only the limited number of rows from the subquery is processed.
– Erwin Brandstetter
Jun 17 '17 at 17:37
...
Send string to stdin
...eky:
0000000: 0000 0000 bef9 0e3c 59f8 8e3c 0a71 d63c .......<Y..<.q.<
0000010: c6f2 0e3d 3eaa 323d 3a5e 563d 090e 7a3d ...=>.2=:^V=..z=
0000020: 7bdc 8e3d 2aaf a03d b67e b23d c74a c43d {..=*..=.~.=.J.=
0000030: 0513 d63d 16d7 e73d a296 f93d a8a8 053e ...=...=...=...>
0000040: 65...
Spring @PostConstruct vs. init-method attribute
...
@Donal Quite true . Was just providing info on how this works.
– Aravind A
Dec 15 '11 at 11:32
1
...
In node.JS how can I get the path of a module I have loaded via require that is *not* mine (i.e. in
... the main attribute in the module's package.json.
That might be moduleName/index.js or it could be moduleName/lib/moduleName.js. In the latter case, path.dirname(require.resolve("moduleName")) will return a directory you may not want or expect: node_modules/moduleName/lib
The correct way to get the...
What is meant by “managed” vs “unmanaged” resources in .NET?
...it's recommended you write your code thusly:
using (var connection = new SqlConnection("connection_string_here"))
{
// Code to use connection here
}
As this ensures that .Dispose() is called on the connection object, ensuring that any unmanaged resources are cleaned up.
...
How to post JSON to PHP with curl
...n" -X POST -d '{"screencast":{"subject":"tools"}}' \
http://localhost:3570/index.php/trainingServer/screencast.json
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How to perform a real time search and filter on a HTML table
...
I created these examples.
Simple indexOf search
var $rows = $('#table tr');
$('#search').keyup(function() {
var val = $.trim($(this).val()).replace(/ +/g, ' ').toLowerCase();
$rows.show().filter(function() {
var text = $(this).text().replac...
Otherwise on StateProvider
...ction($urlRouterProvider){
// when there is an empty route, redirect to /index
$urlRouterProvider.when('', '/index');
// You can also use regex for the match parameter
$urlRouterProvider.when(/aspx/i, '/index');
})
...
How to define hash tables in Bash?
... "$animals_moo"
cow
Bring them together:
# Set a value:
declare "array_$index=$value"
# Get a value:
arrayGet() {
local array=$1 index=$2
local i="${array}_$index"
printf '%s' "${!i}"
}
Let's use it:
$ sound=moo
$ animal=cow
$ declare "animals_$sound=$animal"
$ arrayGet animals "...
Why use static_cast(x) instead of (int)x?
...ometimes you do know that a pointer points to a given subtype, by means opaque to the compiler, and a static_cast is faster. In at least some environments, dynamic_cast requires optional compiler support and runtime cost (enabling RTTI), and you might not want to enable it just for a couple of check...