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What columns generally make good indexes?
As a follow up to " What are indexes and how can I use them to optimise queries in my database? " where I am attempting to learn about indexes, what columns are good index candidates? Specifically for an MS SQL database?
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What is an index in SQL?
What is an index in SQL? Can you explain or reference to understand clearly?
11 Answers
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Zero-pad digits in string
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There's also str_pad
<?php
$input = "Alien";
echo str_pad($input, 10); // produces "Alien "
echo str_pad($input, 10, "-=", STR_PAD_LEFT); // produces "-=-=-Alien"
echo str_pad($input, 10, "_", STR_PAD_BOTH); // produces ...
Do checkbox inputs only post data if they're checked?
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@beeglebug What you're describing is how PHP handles names and values, the [] suffix is not a part of the HTML specification and browsers do not treat it specially. Without the [] PHP will only allow access to a single value (the last value) instead of all values.
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How to get the raw value an field?
...validation rules and rules about what input mechanism to display, but it's quite possible to want to show a numeric keyboard to mobile users without also wanting number validation applied to desktop users. HTML 5.1 will at least solve this problem eventually with the inputmode attribute.
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What does %5B and %5D in POST requests stand for?
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Not least important is why these symbols occur in url.
See https://www.php.net/manual/en/function.parse-str.php#76792, specifically:
parse_str('foo[]=1&foo[]=2&foo[]=3', $bar);
the above produces:
$bar = ['foo' => ['1', '2', '3'] ];
and what is THE method to separate query vars ...
Pandas index column title or name
How do I get the index column name in python pandas? Here's an example dataframe:
9 Answers
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REST API Best practice: How to accept list of parameter values as input [closed]
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A Step Back
First and foremost, REST describes a URI as a universally unique ID. Far too many people get caught up on the structure of URIs and which URIs are more "restful" than others. This argument is as ludicrous as saying naming someone "Bob" is better than naming him "Joe" – both names g...
List columns with indexes in PostgreSQL
I would like to get the columns that an index is on in PostgreSQL.
23 Answers
23
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What's the difference between a 302 and a 307 redirect?
...g the method to GET.
Example usage: if the browser sent POST to /register.php, then now load (GET) /success.html.
307: temporary redirect, repeating the request identically.
Example usage: if the browser sent a POST to /register.php, then this tells it to redo the POST at /signup.php.
308: permanen...