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How can I find the first occurrence of a sub-string in a python string?
...on .
This can be implemented as
def find_pos(string,word):
for i in range(len(string) - len(word)+1):
if string[i:i+len(word)] == word:
return i
return 'Not Found'
string = "the dude is a cool dude"
word = 'dude1'
print(find_pos(string,word))
# output 4
...
Why does Python code use len() function instead of a length method?
...ike x*(a+b) into xa + xb to the clumsiness of doing the same thing using a raw OO notation.
(b) When I read code that says len(x) I know that it is asking for the length of something. This tells me two things: the result is an integer, and the argument is some kind of container. To the contrary, whe...
Can I use assert on Android devices?
...
See the Embedded VM Control document (raw HTML from the source tree, or a nicely formatted copy).
Basically, the Dalvik VM is set to ignore assertion checks by default, even though the .dex byte code includes the code to perform the check. Checking assertions i...
How to get a complete list of ticker symbols from Yahoo Finance? [closed]
...
Nice one. The raw YQL: select * from yahoo.finance.industry where id in (select industry.id from yahoo.finance.sectors)
– David Gilbertson
Apr 2 '14 at 4:49
...
Which is the preferred way to concatenate a string in Python?
...f you want to comment on part of a string (as above) or if you want to use raw strings or triple quotes for part of a literal but not all.
Since this happens at the syntax layer it uses zero concatenation operators.
share
...
Enums and Constants. Which to use when?
...
Use enums when you want to define a range of values that something can be. Colour is an obvious example like:
public enum Colour
{
White,
Red,
Blue
}
Or maybe a set of possible things like:
(Example I stole from here as I'm lazy)
[FlagsAttribute...
Fragment or Support Fragment?
...ncluded in your application. Each of these libraries supports
a specific range of Android platform versions and set of features.
This guide explains the important features and version support
provided by the Support Libraries to help you decide which of them you
should include in your app...
No newline at end of file
...reating text files differently to files containing other kinds of data (eg raw binary data which isn't human-readable).
Because of this convention, many tools from that era expect the ending newline, including text editors, diffing tools, and other text processing tools. Mac OS X was built on BSD U...
Scala: What is the difference between Traversable and Iterable traits in Scala collections?
...oreach, to traverse all elements at once without stopping.
Something like Range(1, 10) needs to have only 2 integers as state as a Traversable. But Range(1, 10) as an Iterable gives you an iterator which needs to use 3 integers for state, one of which is an index.
Considering that Traversable also...
Algorithm to return all combinations of k elements from n
..., with minor changes – I used the index of the sets rather than a number range to represent the set, so we are always working from 0...n.
Note:
Since combinations are unordered, {1,3,2} = {1,2,3} --we order them to be lexicographical.
This method has an implicit 0 to start the set for the first ...