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When should I use nil and NULL in Objective-C?
...ails to acknowledge that [NSNull null] is a very different beast. To quote from NSNull Class Reference, "The NSNull class defines a singleton object used to represent null values in collection objects (which don’t allow nil values)." Also see Using NSNull section of Number and Value Programming To...
How to convert a string with comma-delimited items to a list in Python?
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If you actually want arrays:
>>> from array import array
>>> text = "a,b,c"
>>> text = text.replace(',', '')
>>> myarray = array('c', text)
>>> myarray
array('c', 'abc')
>>> myarray[0]
'a'
>>> myarray[1]
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TypeScript sorting an array
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The easiest way seems to be subtracting the second number from the first:
var numericArray:Array<number> = [2,3,4,1,5,8,11];
var sorrtedArray:Array<number> = numericArray.sort((n1,n2) => n1 - n2);
https://alligator.io/js/array-sort-numbers/
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How do you search for files containing DOS line endings (CRLF) with grep on Linux?
...he -l option as well.
Explanation
-I ignore binary files
-U prevents grep from stripping CR characters. By default it does this it if it decides it's a text file.
-r read all files under each directory recursively.
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apc vs eaccelerator vs xcache
...cope well with heavy lock contention -- don't try to write to a single key from multiple processes simultaneously.
– Frank Farmer
Nov 19 '09 at 21:38
10
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How do I make a LinearLayout scrollable?
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@JoaoFilipeClementeMartins if you aren't going to benefit from the adapter functionality of the ListView, then you can simply add all the elements of your list in a LinearLayout wrapper to make it feel all streamlined in the scrollable box along with other elements.
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Empty set literal?
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Just to extend the accepted answer:
From version 2.7 and 3.1 python has got set literal {} in form of usage {1,2,3}, but {} itself still used for empty dict.
Python 2.7 (first line is invalid in Python <2.7)
>>> {1,2,3}.__class__
<type 'set'>...
Append a NumPy array to a NumPy array
...c'],
dtype='|S1')
As you see based on the contents the dtype went from int64 to float32, and then to S1
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How can I search sub-folders using glob.glob module?
...s. You could use glob.iglob() to return paths one by one. Or use pathlib:
from pathlib import Path
path = Path(r'C:\Users\sam\Desktop')
txt_files_only_subdirs = path.glob('*/*.txt')
txt_files_all_recursively = path.rglob('*.txt') # including the current dir
Both methods return iterators (you can...
Isn't “package private” member access synonymous with the default (no-modifier) access?
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From Java Language Spec
6.6.5 Example: Default-Access Fields, Methods, and Constructors If
none of the access modifiers public,
protected, or private are specified, a
class member or constructor is
accessible t...