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selecting unique values from a column
...nstead of using SELECT * ... use SELECT column 1, column 2... Unless you really do need all columns.
– LPChip
Nov 18 '17 at 20:43
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Measuring the distance between two coordinates in PHP
...- http://www.codexworld.com/distance-between-two-addresses-google-maps-api-php/
$latitudeFrom = '22.574864';
$longitudeFrom = '88.437915';
$latitudeTo = '22.568662';
$longitudeTo = '88.431918';
//Calculate distance from latitude and longitude
$theta = $longitudeFrom - $longitudeTo;
$dist = sin(de...
What is the difference between Ruby 1.8 and Ruby 1.9
...> ?c
=> "c"
Ruby 1.8.6
irb(main):001:0> ?c
=> 99
String index.
Ruby 1.9
irb(main):001:0> "cat"[1]
=> "a"
Ruby 1.8.6
irb(main):001:0> "cat"[1]
=> 97
{"a","b"} No Longer Supported
Ruby 1.9
irb(main):002:0> {1,2}
SyntaxError: (irb):2: syntax error, unexpecte...
Relative URLs in WordPress
...oesn't use relative URLs:
Core ticket:
Root-relative URLs aren't really proper. /path/ might not be WordPress, it might be outside of the install. So really it's not much different than an absolute URL.
Any relative URLs also make it significantly more difficult to perform transformations ...
How do I get the current time zone of MySQL?
...ng the web server and the DB server it's talking to are set to [if not actually in] the same timezone isn't a huge leap.) But beware that (as with MySQL), you can set the timezone that PHP uses (date_default_timezone_set), which means it may report a different value than the OS is using. If you're i...
Why does Java switch on contiguous ints appear to run faster with added cases?
...n which the switch is being performed is manipulated to convert it into an index in to the jump table. In this implementation , the time taken in the switch statement is much less than the time taken in an equivalent if-else-if statement cascade. Also the time taken in the switch statement is indep...
How to create a date object from string in javascript [duplicate]
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var d = new Date(2011,10,30);
as months are indexed from 0 in js.
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How to implement a rule engine?
... ICollection>. This enabled me to create a "TestAll" capability and an indexer for executing a specific rule by name. Here are the implementations for those two methods.
/// <summary>
/// Indexer which enables accessing rules in the collection by name
/// </summary>
...
How to get all registered routes in Express?
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DEBUG=express:* node index.js
If you run your app with the above command, it will launch your app with DEBUG module and gives routes, plus all the middleware functions that are in use.
You can refer: ExpressJS - Debugging and debug.
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Converting JavaScript object with numeric keys into array
...uestion wasn't explicit, but I had assumed that the keys of the object are indexes of the array by nature of them being (0,1,2,3). Just pointing out that people should know that this method doesn't guarantee any order in the array; if the keys are indexes then you need to explicitly order them so t...