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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
...
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...
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 "...
In Flux architecture, how do you manage Store lifecycle?
...D_ERROR).
// Paginated Stores keep their data like this
[7, 10, 5, ...]
Indexed List Stores are like List Stores but they define one-to-many relationship. For example, “user's subscribers”, “repository's stargazers”, “user's repositories”. They also handle pagination.
They also norma...
MongoDB Many-to-Many Association
... Read, Update, Delete, List Users, Add User, Remove User, Clear All Users, Index of User or similar to support "Is User In Role" (operations like a container + its own metadata).
User - Create, Read, Update, Delete (CRUD operations like a free-standing entity)
This can be modeled as the following ...
Is there StartsWith or Contains in t sql with variables?
...
StartsWith
a) left(@edition, 15) = 'Express Edition'
b) charindex('Express Edition', @edition) = 1
Contains
charindex('Express Edition', @edition) >= 1
Examples
left function
set @isExpress = case when left(@edition, 15) = 'Express Edition' then 1 else 0 end
iif function (...
Difference between . and : in Lua
...y the local variable? Because, as many have pointed out, obj:method() only indexes _ENV once to get obj. This normally just important when considering speed, but consider this situation:
local tab do
local obj_local = { method = function(self, n) print n end }
tab = setmetatable({}, {__index = ...