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Difference between local and global indexes in DynamoDB
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Here is the formal definition from the documentation:
Global secondary index — an index with a hash and range key that can
be different from those on the table. A global secondary index is
considered "global" because queries on the index can spa...
Smooth GPS data
...mple Kalman filter that could be used for exactly this situation. It came from some work I did on Android devices.
General Kalman filter theory is all about estimates for vectors, with the accuracy of the estimates represented by covariance matrices. However, for estimating location on Android de...
How to generate random number with the specific length in python
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To get a random 3-digit number:
from random import randint
randint(100, 999) # randint is inclusive at both ends
(assuming you really meant three digits, rather than "up to three digits".)
To use an arbitrary number of digits:
from random import randin...
How to prevent a click on a '#' link from jumping to top of page?
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In jQuery, when you handle the click event, return false to stop the link from responding the usual way prevent the default action, which is to visit the href attribute, from taking place (per PoweRoy's comment and Erik's answer):
$('a.someclass').click(function(e)
{
// Special stuff to do whe...
Removing Java 8 JDK from Mac
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You saved me from a huge headache..god bless you
– user578386
Jul 4 '17 at 7:05
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How to send an email using PHP?
...dy@example.com';
$subject = 'the subject';
$message = 'hello';
$headers = 'From: webmaster@example.com' . "\r\n" .
'Reply-To: webmaster@example.com' . "\r\n" .
'X-Mailer: PHP/' . phpversion();
mail($to, $subject, $message, $headers);
?>
Reference:
http://php.net/manual/en/function.m...
Nodejs Event Loop
...n the thread pool and libev provide the interaction with the main loop. So from my understanding, node.js has 1 permanent event loop: that's the v8 event loop. To handle C++ async tasks it's using a threadpool [via libeio & libev ].
For example:
eio_custom(Task,FLAG,AfterTask,Eio_REQUEST);
W...
How to determine function name from inside a function
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From the Bash Reference Manual:
FUNCNAME
An array variable containing the names of all shell functions currently in the execution call stack. The element with index 0 is the name of any currently-executing shell function. Th...
INSTALL_FAILED_UPDATE_INCOMPATIBLE when I try to install compiled .apk on device
I've compiled Trebuchet launcher from CyanogenMod 9, and trying to install it with adb:
29 Answers
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Download a file from NodeJS Server using Express
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Thanks.. Is there a way to get this information from the fs.readFileSync? I'm using a static file in this example but I'll use this download api for any files, passing the name of it.
– Thiago Miranda de Oliveira
Sep 2 '11 at 20:33
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