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Maven error: Could not find or load main class org.codehaus.plexus.classworlds.launcher.Launcher
...nd this article. For Maven3, changing my environment variable name from M2_HOME to M3_HOME did the trick. I am on a Mac running OSX 10.9 with JDK 1.7. Hope this helps.
Note: Please delete M2_HOME, if already set. Eg: unset M2_HOME
...
Prototypical inheritance - writing up [duplicate]
...indicate to other programmers a member is meant to be private by naming it _aPrivate or putting all the private variables in an object variable called _.
You can implement private members through closures but instance specific private members can only be accessed by functions that are not on the p...
How to run `rails generate scaffold` when the model already exists?
...
TL;DR: rails g scaffold_controller <name>
Even though you already have a model, you can still generate the necessary controller and migration files by using the rails generate option. If you run rails generate -h you can see all of the optio...
How to use a variable inside a regular expression?
...scaped. Only special characters with meaning in a regex are still escaped. _ is not escaped since Python 3.3.(s. here)
Curly braces:
If you want to use quantifiers within the regular expression using f-strings, you have to use double curly braces. Let's say you want to match TEXTO followed by exac...
How to wait 5 seconds with jQuery?
...
Use a normal javascript timer:
$(function(){
function show_popup(){
$("#message").slideUp();
};
window.setTimeout( show_popup, 5000 ); // 5 seconds
});
This will wait 5 seconds after the DOM is ready. If you want to wait until the page is actually loaded you need to u...
Extracting extension from filename in Python
...hon 3.X documentation):
>>> import os
>>> filename, file_extension = os.path.splitext('/path/to/somefile.ext')
>>> filename
'/path/to/somefile'
>>> file_extension
'.ext'
Unlike most manual string-splitting attempts, os.path.splitext will correctly treat /a/b.c/...
How could I ignore bin and obj folders from git repository?
...l .gitignore file from one of my Visual Studio/git projects:
*.suo
*.user
_ReSharper.*
bin
obj
packages
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What's the difference between array_merge and array + array?
...ce is:
The + operator takes the union of the two arrays, whereas the array_merge function takes the union BUT the duplicate keys are overwritten.
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Eclipse: How do i refresh an entire workspace? F5 doesn't do it
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on windows i've used "C:\Windows\twunk_32.exe" doesn't seem to hurt :)
– iTake
Jan 10 '14 at 12:55
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Checking if all elements in a list are unique
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An early-exit solution could be
def unique_values(g):
s = set()
for x in g:
if x in s: return False
s.add(x)
return True
however for small cases or if early-exiting is not the common case then I would expect len(x) != len(set(x)) being t...