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Interview question: Check if one string is a rotation of other string [closed]
...1. Clearly, all of its substrings with size s1.length are rotations of s1, by construction. Therefore, any string of size s1.length that is a substring of s1+s1 must be a rotation of s1.
– Daniel C. Sobral
Apr 7 '10 at 3:08
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How to add images in select list?
...ayed. If you want to allow selecting multiple values, you could achieve it by using checkboxes instead of radio buttons.
Here is an example. The code may be a bit messier (specially compared to the other solutions):
.select-sim {
width:200px;
height:22px;
line-height:22px;
vertical...
Get the first item from an iterable that matches a condition
... for iterators. The first element of the filtered iterator can be obtained by calling next() on it:
from itertools import ifilter
print ifilter((lambda i: i > 3), range(10)).next()
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How to unzip a file using the command line? [closed]
...e/library/pkunzip.html
or
7zip: http://www.7-zip.org/download.html
Free byte zip: http://www.freebyte.com/fbzip/
or infozip: http://infozip.sourceforge.net/
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Listening for variable changes in JavaScript
...point. In my case I have an object created somewhere else and been updated by some other code... a proxy, in this case, is not useful since the changes will be done on the target.
– Cristiano
Jul 11 '19 at 10:33
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Expression Versus Statement
...sult. In C, every syntactic expression can be a made into a statement just by tacking a semicolon along the end:
1 + 2 / x;
is a totally legit statement even though absolutely nothing will happen. Similarly, in C, an expression can have side-effects—it can change something.
1 + 2 / callfunc(1...
How to check if a python module exists without importing it
...')
# only accept it as valid if there is a source file for the module - no bytecode only.
found = issubclass(type(spam_loader), importlib.machinery.SourceFileLoader)
Python3 ≥ 3.4
In Python3.4 importlib.find_loader python docs was deprecated in favour of importlib.util.find_spec. The recommended...
SLF4J: Failed to load class “org.slf4j.impl.StaticLoggerBinder”
... mentioned here - slf4j.org/manual.html But i get a new error now - Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
– david blaine
Apr 17 '13 at 7:10
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How to get current foreground activity context in android?
...ation from ActivityManager. We get the current foreground running Activity by
ActivityManager am = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE);
ComponentName cn = am.getRunningTasks(1).get(0).topActivity;
UPDATE 2018/10/03
getRunningTasks() is DEPRECATED. see the solutions...
Sending HTML email using Python
...
Here is a simple way to send an HTML email, just by specifying the Content-Type header as 'text/html':
import email.message
import smtplib
msg = email.message.Message()
msg['Subject'] = 'foo'
msg['From'] = 'sender@test.com'
msg['To'] = 'recipient@test.com'
msg.add_header(...