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How can I delete the current line in Emacs?
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If you want to delete a number of whole lines, you can prefix the command with a number:
C-u 5 C-S-backspace # deletes 5 whole lines
M-5 C-S-backspace # deletes 5 whole lines
C-u C-S-backspace # delete 4 whole lines. C-u without a number defaults to 4
C-u -5 C-S-backspace # de...
How can I scroll a web page using selenium webdriver in python?
...ently using selenium webdriver to parse through facebook user friends page and extract all ids from the AJAX script. But I need to scroll down to get all the friends. How can I scroll down in Selenium. I am using python.
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How to clear a chart from a canvas so that hover events cannot be triggered?
I'm using Chartjs to display a Line Chart and this works fine:
20 Answers
20
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Why use @PostConstruct?
...s are injected. In the @PostConstruct method the bean is fully initialized and you can use the dependencies.
because this is the contract that guarantees that this method will be invoked only once in the bean lifecycle. It may happen (though unlikely) that a bean is instantiated multiple times by th...
Mercurial - all files that changed in a changeset?
... to list only files that have changed then you should be using "status command"
The following will list the changes to files in revision REV
hg status --change REV
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How to use http.client in Node.js if there is basic authorization
...eld in the header.
It contains the authentication type Basic in this case and the username:password combination which gets encoded in Base64:
var username = 'Test';
var password = '123';
var auth = 'Basic ' + Buffer.from(username + ':' + password).toString('base64');
// new Buffer() is deprecated ...
How do I create multiple submit buttons for the same form in Rails?
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You can create multiple submit buttons and provide a different value to each:
<% form_for(something) do |f| %>
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<%= f.submit 'A' %>
<%= f.submit 'B' %>
..
<% end %>
This will output:
<input type="submit" value="A" i...
Git error: “Host Key Verification Failed” when connecting to remote repository
...trying to connect to a remote Git repository that resides on my web server and clone it to my machine.
18 Answers
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HttpURLConnection timeout settings
...as a setConnectTimeout method.
Just set the timeout to 5000 milliseconds, and then catch java.net.SocketTimeoutException
Your code should look something like this:
try {
HttpURLConnection.setFollowRedirects(false);
HttpURLConnection con = (HttpURLConnection) new URL(url).openConnection();...
How to use null in switch
... Integer or other Wrapper class, because of unboxing. But what about enums and strings? Why can't they be null?
– Luan Nico
Nov 2 '13 at 11:20
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