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Sort a list by multiple attributes?
...t one ascending and the second one descending? (Assume both attributes are strings, so no hacks like adding - for integers)
– Martin Thoma
Aug 5 '13 at 11:03
...
O(nlogn) Algorithm - Find three evenly spaced ones within binary string
... it. Those who guessed FFT were right.
The problem: we are given a binary string S of length n, and we want to find three evenly spaced 1s in it. For example, S may be 110110010, where n=9. It has evenly spaced 1s at positions 2, 5, and 8.
Scan S left to right, and make a list L of positions of 1...
Glorified classes in the Java language
...ance). I would also add its generic typing without creating new instances.
String - with it's overloaded +-operator and the support of literals
Enum - the only class that can be used in a switch statement (soon a privilege to be given to String as well). It does other things as well (automatic stati...
Label encoding across multiple columns in scikit-learn
...ing to use scikit-learn's LabelEncoder to encode a pandas DataFrame of string labels. As the dataframe has many (50+) columns, I want to avoid creating a LabelEncoder object for each column; I'd rather just have one big LabelEncoder objects that works across all my columns of data.
...
How to access property of anonymous type in C#?
... the following message at runtime: "'<>f__AnonymousType0<bool,int,string>' does not contain a definition for 'Checked2'".
2. Solution with reflection
The solution with reflection works both with old and new C# compiler versions. For old C# versions please regard the hint at the end of ...
Running a cron every 30 seconds
...p;
# Execute the payload, some random duration up to the limit.
# Extra blank line if excess payload.
((delay = RANDOM % maxtime + 1))
((maxtime += 1))
echo "$(date) Sleeping for ${delay} seconds (max ${maxtime})."
[[ ${delay} -gt 30 ]] && echo
sleep ${delay}
...
Integrating the ZXing library directly into my Android application
... layout file
ImageView imageView = (ImageView) findViewById(R.id.qrCode);
String qrData = "Data I want to encode in QR code";
int qrCodeDimention = 500;
QRCodeEncoder qrCodeEncoder = new QRCodeEncoder(qrData, null,
Contents.Type.TEXT, BarcodeFormat.QR_CODE.toString(), qrCodeDimention);
tr...
Stack smashing detected
...s protection variables (called canaries) which have known values. An input string of size greater than 10 causes corruption of this variable resulting in SIGABRT to terminate the program.
To get some insight, you can try disabling this protection of gcc using option -fno-stack-protector while co...
python design patterns [closed]
...ttributes."
return self
def __repr__(self):
"Return a string representation."
return "<Null>"
def __str__(self):
"Convert to a string and return it."
return "Null"
With this, if you do Null("any", "params", "you", "want").attribute_that_doesn...
Sorting object property by values
...and you can choose to sort by whatever object property you want, number or string, if you put the objects in an array. Consider this array:
var arrayOfObjects = [
{
name: 'Diana',
born: 1373925600000, // Mon, Jul 15 2013
num: 4,
sex: 'female'
},
{
...