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Moving decimal places over in a double
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If you use double or float, you should use rounding or expect to see some rounding errors. If you can't do this, use BigDecimal.
The problem you have is that 0.1 is not an exact representation, and by performing the calculation twice, you are...
npm install from Git in a specific version
Assumed that I have written a module for Node.js which I would like to keep private. I know that I can (should) add the line:
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How to include file in a bash shell script
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Simply put inside your script :
source FILE
Or
. FILE # POSIX compliant
$ LANG=C help source
source: source filename [arguments]
Execute commands from a file in the current shell.
Read and execute commands from FILENAME in the current shell. The
entries in $PATH ar...
How to change color of SVG image using CSS (jQuery SVG image replacement)?
...use an IMG tag in your HTML to embed an SVG graphic. I used Adobe Illustrator to make the graphic.
<img id="facebook-logo" class="svg social-link" src="/images/logo-facebook.svg"/>
This is just like how you'd embed a normal image. Note that you need to set the IMG to have a class of svg. Th...
is there a require for json in node.js
...de a couple of JSON files in my JavaScript code that are in the same directory as my JavaScript source file.
6 Answers
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How do multiple clients connect simultaneously to one port, say 80, on a server? [duplicate]
I understand the basics of how ports work. However, what I don't get is how multiple clients can simultaneously connect to say port 80. I know each client has a unique (for their machine) port. Does the server reply back from an available port to the client, and simply state the reply came from 80? ...
How to define several include path in Makefile
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You have to prepend every directory with -I:
INC=-I/usr/informix/incl/c++ -I/opt/informix/incl/public
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How to convert the background to transparent? [closed]
... images(small icon) with background colour(red/blue/white) to transparent for the website.
5 Answers
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How to rollback just one step using rake db:migrate
...think using VERSION=n is the right way to do that, but I don't know the correct value of n to use. Is there any command to check the current n value?
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How to send an email using PHP?
...sing PHP's mail() function it's possible. Remember mail function will not work on a Local server.
<?php
$to = 'nobody@example.com';
$subject = 'the subject';
$message = 'hello';
$headers = 'From: webmaster@example.com' . "\r\n" .
'Reply-To: webmaster@example.com' . "\r\n" .
'X-Maile...