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What is the 'new' keyword in JavaScript?
... to Function.prototype, numbers to Number.prototype, etc.). It can only be read with Object.getPrototypeOf(someObject). There is no other way to set or read this value.
Functions, in addition to the hidden [[prototype]] property, also have a property called prototype, and it is this that you can ac...
Changing user agent on urllib2.urlopen
...lib2.Request('www.example.com', None, headers)
html = urllib2.urlopen(req).read()
Or, a bit shorter:
req = urllib2.Request('www.example.com', headers={ 'User-Agent': 'Mozilla/5.0' })
html = urllib2.urlopen(req).read()
sh...
How can I add numbers in a Bash script?
...b directly, no need to ls
echo "$j"
# 'grep' can read files, no need to use 'cat'
metab=$(grep EndBuffer "$j" | awk '{sum+=$2} END { print sum/120}')
num=$(( $num + $metab ))
done
echo "$num"
done
As described in Bash FAQ 022, Bash does not...
/etc/apt/sources.list" E212: Can't open file for writing
... of how to save those changes:
One time Setup demo to create a root owned read only file for a lower user:
sudo touch temp.txt
sudo chown root:root temp.txt
sudo chmod 775 temp.txt
whoami
el
First open the file as normal user:
vi temp.txt
Then make some changes to the file, it warns you its r...
Play audio with Python
...
Reading this made me so emotional. My eyes literally teared up with happiness. Did not expect that kind of reaction from myself. (They linked to a module I made.)
– ArtOfWarfare
Jan 24 '...
How do I programmatically get the GUID of an application in .net2.0
...
You should be able to read the Guid attribute of the assembly via reflection. This will get the GUID for the current assembly
Assembly asm = Assembly.GetExecutingAssembly();
var attribs = (asm.GetCustomAttributes(typeof(GuidAttri...
Make a UIButton programmatically in Swift
...
Inversely, anyone reading this may also want to know that if your button action references a function that takes no parameter, the colon is not needed and may even cause an error if not removed.
– Dave G
...
How do I look inside a Python object?
...
First, read the source.
Second, use the dir() function.
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u'\ufeff' in Python string
...automatically handle the encoding.
Without it, the BOM is included in the read result:
>>> f = open('file', mode='r')
>>> f.read()
'\ufefftest'
Giving the correct encoding, the BOM is omitted in the result:
>>> f = open('file', mode='r', encoding='utf-8-sig')
>>...
Fast way of finding lines in one file that are not in another?
...ne in a line-content indexed associative array ss2[]. After both files are read, iterate over ll1 and use the in operator to determine if the line in file1 is present in file2. (This will have have different output to the diff method if there are duplicates.)
In the event that the files are suffici...