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Variable name as a string in Javascript
...
Typically, you would use a hash table for a situation where you want to map a name to some value, and be able to retrieve both.
var obj = { myFirstName: 'John' };
obj.foo = 'Another name';
for(key in obj)
console.log(k...
Why are Python lambdas useful? [closed]
...ut lambda functions? Like
lambda x: x**2 + 2*x - 5
Those things are actually quite useful. Python supports a style of programming called functional programming where you can pass functions to other functions to do stuff. Example:
mult3 = filter(lambda x: x % 3 == 0, [1, 2, 3, 4, 5, 6, 7, 8, 9])...
What does ~~ (“double tilde”) do in Javascript?
...he value to a string or a boolean), then inverts the lowest 31 bits. Officially ECMAScript numbers are all floating-point, but some numbers are implemented as 31-bit integers in the SpiderMonkey engine.
You can use it to turn a 1-element array into an integer. Floating-points are converted accordin...
IE8 support for CSS Media Query
...ous rules.
For example:
<link rel="stylesheet" type="text/css" media="all" href="style.css"/>
<!--[if lt IE 9]>
<link rel="stylesheet" type="text/css" media="all" href="style-ie.css"/>
<![endif]-->
This won't allow for a responsive design in IE8, but could be a simpler an...
Cluster analysis in R: determine the optimal number of clusters
...lidean",
method = "kmeans", min.nc=2, max.nc=15,
index = "alllong", alphaBeale = 0.1)
hist(nb$Best.nc[1,], breaks = max(na.omit(nb$Best.nc[1,])))
# Looks like 3 is the most frequently determined number of clusters
# and curiously, four clusters is not in the output at all!
If yo...
How To Auto-Format / Indent XML/HTML in Notepad++
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Since I upgraded to 6.3.2, I use XML Tools.
install XML Tools via the Plugin Admin (Plugins → Plugins Admin... Then search for "XML Tools", check its box and click the "Install" button).
use the shortcut Ctrl+Alt+Shift+B (or
menu → Plugins → XML Tools → Pretty Prin...
How do I remove a MySQL database?
...e users; i.e., force MySQL to read the user's privileges again.
-- DELETE ALL RECIPE
drop schema <database_name>;
-- Same as `drop database <database_name>`
drop user <a_user_name>;
-- You may need to add a hostname e.g `drop user bob@localhost`
FLUSH PRIVILEGES;
Good luck!
...
HTML5 dragleave fired when hovering a child element
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This worked for me in all browsers, but Firefox. I have a new solution which works everywhere in my case. On the first dragenter I save event.currentTarget in a new variable dragEnterTarget. As long as dragEnterTarget is set, I ignore further drag...
Disable HttpClient logging
...ger.httpclient.wire.content=WARN
Note that if Log4j library is not installed, HttpClient (and therefore JWebUnit) will use logback. In this situation, create or edit logback.xml to include:
<configuration>
<logger name="org.apache" level="WARN" />
<logger name="httpclient...
HttpWebRequest using Basic authentication
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Aaaargh! 1: Thanks, mate. 2. I'd really like to understand why the other methods, setting the authentication method in the CredentialCache, wouldn't work at all. They are supposed to, aren't they?
– mshthn
Jul 28 '17 at 1...