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How can I count the occurrences of a list item?
... only want one item's count, use the count method:
>>> [1, 2, 3, 4, 1, 4, 1].count(1)
3
Don't use this if you want to count multiple items. Calling count in a loop requires a separate pass over the list for every count call, which can be catastrophic for performance. If you want to count...
Generics in C#, using type of a variable as parameter [duplicate]
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4 Answers
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How to rethrow InnerException without losing stack trace in C#?
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490
In .NET 4.5 there is now the ExceptionDispatchInfo class.
This lets you capture an exception ...
How do I use the conditional operator (? :) in Ruby?
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498
It is the ternary operator, and it works like in C (the parenthesis are not required). It's an...
How do I extract text that lies between parentheses (round brackets)?
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457
If you wish to stay away from regular expressions, the simplest way I can think of is:
string...
T-SQL: Deleting all duplicate rows but keeping one [duplicate]
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edited Jun 23 '14 at 13:19
Baldy
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How do I find out which keystore was used to sign an app?
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413
First, unzip the APK and extract the file /META-INF/ANDROID_.RSA (this file may also be CERT.R...
ORA-12514 TNS:listener does not currently know of service requested in connect descriptor
...N\tnsnames.ora
– Brad Rippe
Sep 8 '14 at 22:48
211
How am I supposed to query the DB if I'm not a...
Java String remove all non numeric characters
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Try this code:
String str = "a12.334tyz.78x";
str = str.replaceAll("[^\\d.]", "");
Now str will contain "12.334.78".
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Convert Unix timestamp to a date string
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184
With GNU's date you can do:
date -d "@$TIMESTAMP"
# date -d @0
Wed Dec 31 19:00:00 EST 1969...