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How to subtract X days from a date using Java calendar?
Anyone know a simple way using Java calendar to subtract X days from a date?
10 Answers
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Quit and restart a clean R session from within R?
... I believe opening a "clean R session" requires that 1-Data from current session is removed; 2-Packages from current session are unloaded. .rs.restartR() does not seem to do either of these things on my machine..
– steadyfish
May 6 '16 at 13:58
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Using IPython notebooks under version control
...e.ipynb, although it would at least keep git diff notebook_file.ipynb free from base64 garbage).
that said, incidentally if you do pull code (i.e. committed by someone else not using this approach) which contains some output, the output is checked out normally. Only the locally produced output is lo...
How to generate a Dockerfile from an image?
Is it possible to generate a Dockerfile from an image? I want to know for two reasons:
8 Answers
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Is there anyway to exclude artifacts inherited from a parent POM?
Artifacts from dependencies can be excluded by declaring an <exclusions> element inside a <dependency> But in this case it's needed to exclude an artifact inherited from a parent project. An excerpt of the POM under discussion follows:
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Amazon products API - Looking for basic overview and information
... the ebay API recently, I was expecting it to be as simple to request info from Amazon, but it seems not...
6 Answers
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Should I use the Reply-To header when sending emails as a service to others?
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You may want to consider placing the customer's name in the From header and your address in the Sender header:
From: Company A <joe.bloggs@a.com>
Sender: notifications@b.com
Most mailers will render this as "From notifications@b.com on behalf of Company A", which is accurate....
Chrome extension: accessing localStorage in content script
...tml
It is pretty easy to use like the other Chrome APIs and you can use it from any page context within Chrome.
// Save it using the Chrome extension storage API.
chrome.storage.sync.set({'foo': 'hello', 'bar': 'hi'}, function() {
console.log('Settings saved');
});
// Read it ...
How to prevent buttons from submitting forms
...; return false;">Remove Last Item</button>
...that'll keep them from triggering a submit action when an exception occurs in the event handler. Then, fix your removeItem() function so that it doesn't trigger an exception:
function removeItem() {
var rows = $('form tr');
if ( rows.leng...
What's the difference between an inverted index and a plain old index?
...indexes - it's just a question of which direction you're going. Forward is from documents->to->words, inverted is from words->to->documents.
Example 2: DNS
Another example is a DNS lookup (which takes a host name, and returns an IP address) and a reverse lookup (which takes an IP add...