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PostgreSQL DISTINCT ON with different ORDER BY
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Documentation says:
DISTINCT ON ( expression [, ...] ) keeps only the first row of each set of rows where the given expressions evaluate to equal. [...] Note that the "first row" of each set is unpredictable unless ORDER BY is used to ensure that the desired ro...
Python - Get path of root project structure
I've got a python project with a configuration file in the project root.
The configuration file needs to be accessed in a few different files throughout the project.
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Setting PATH environment variable in OSX permanently
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Difference between EXISTS and IN in SQL?
...t quicker than count.
The in is best used where you have a static list to pass:
select * from [table]
where [field] in (1, 2, 3)
When you have a table in an in statement it makes more sense to use a join, but mostly it shouldn't matter. The query optimiser should return the same plan either wa...
Set Page title using UI-Router
I am migrating my AngularJS based app to use ui-router instead of the built in routing. I have it configured as shown below
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What must I know to use GNU Screen properly? [closed]
...that you'd think worthwhile to teach someone, a beginner, from the ground up. What are some analogies and handy tips for remembering binds, etc.?
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Can I use a :before or :after pseudo-element on an input field?
I am trying to use the :after CSS pseudo-element on an input field, but it does not work. If I use it with a span , it works OK.
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Dynamic validation and name in a form with AngularJS
...olution created by @caitp and @Thinkscape:
// Workaround for bug #1404
// https://github.com/angular/angular.js/issues/1404
// Source: http://plnkr.co/edit/hSMzWC?p=preview
app.config(['$provide', function($provide) {
$provide.decorator('ngModelDirective', function($delegate) {
var ngMo...
Difference between char* and const char*?
...ion: You can change the pointer, but not the char to which name points to (https://msdn.microsoft.com/en-us/library/vstudio/whkd4k6a(v=vs.100).aspx, see "Examples"). In this case, the const specifier applies to char, not the asterisk.
According to the MSDN page and http://en.cppreference.com/w/cpp/...
Using curl to upload POST data with files
... HTTPie, it'a CLI, cURL-like tool for humans.
Installation instructions: https://github.com/jakubroztocil/httpie#installation
Then, run:
http -f POST http://localhost:4040/api/users username=johnsnow photo@images/avatar.jpg
HTTP/1.1 200 OK
Access-Control-Expose-Headers: X-Frontend
Cache-control:...