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Display a tooltip over a button using Windows Forms
... in this.Controls)
{
if (ctrl is Button && ctrl.Tag is string)
{
ctrl.MouseHover += new EventHandler(delegate(Object o, EventArgs a)
{
var btn = (Control)o;
ToolTip1.SetToolTip(btn, btn.Tag.ToString());
}...
Turning off some legends in a ggplot
...
You can use guide=FALSE in scale_..._...() to suppress legend.
For your example you should use scale_colour_continuous() because length is continuous variable (not discrete).
(p3 <- ggplot(mov, aes(year, rating, colour = length, shape = mpaa)) +
sca...
ipython: print complete history (not just current session)
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First use %hist -o -g -f ipython_history.md to output the history (input and output) to a text file. (http://ipython.readthedocs.io/en/stable/interactive/magics.html#magic-history)
Then you can use the the get_session_info function to retreive the date and...
How do I upload a file with metadata using a REST web service?
...p://example.com/add-file
...in which case request.args['files'] will be a string containing all the files, which you'll have to parse yourself — not sure how to do it, but I'm sure it's not difficult, or better just use the previous approaches.
The difference between @ and < is that @ causes t...
How to create JSON string in C#
...te some XML to send back in an HTTP response. How would you create a JSON string. I assume you would just use a stringbuilder to build the JSON string and them format your response as JSON?
...
Cannot read configuration file due to insufficient permissions
... is same as above, but a little longer and simpler and improved.
First of all: you don't have to change anything in your config file. It's OK. The problem is with windows file permissions.
This problems occurs because your application can not access and read web.config file.
Make the file accessi...
How to check if an NSDictionary or NSMutableDictionary contains a key?
...use valueForKey for a JSON dictionary. That's because JSON can contain any string as a key. For example, if it contains "@count" as a key, then objectForKey:@"@count" will give the correct value, but valueForKey:@"@count" will give the number of key/value pairs.
– gnasher729
...
How do I programmatically click a link with javascript?
...
Actually, so far it worked in all browsers I tried, including IE, Safari, Chrome, Firefox and Opera.
– arik
Jan 29 '12 at 17:17
...
How to update column with null value
...have tried this many different ways and the best I have gotten is an empty string.
13 Answers
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MAC addresses in JavaScript
...
I concur with all the previous answers that it would be a privacy/security vulnerability if you would be able to do this directly from Javascript. There are two things I can think of:
Using Java (with a signed applet)
Using signed Javasc...