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unix - head AND tail of file
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For a pure stream (e.g. output from a command), you can use 'tee' to fork the stream and send one stream to head and one to tail. This requires using either the '>( list )' feature of bash (+ /dev/fd/N):
( COMMAND | tee /dev/fd/3 | head ) 3> >( ...
What is the purpose of double curly braces in React's JSX syntax?
From the react.js tutorial we see this usage of double curly braces:
7 Answers
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What is the C# Using block and why should I use it? [duplicate]
What is the purpose of the Using block in C#? How is it different from a local variable?
9 Answers
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Long press on UITableView
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How do you prevent the table view from navigating into the cell (if you have 'didSelectRowAtIndexPath' implemented?)
– Marchy
Sep 15 '16 at 17:45
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How to display pandas DataFrame of floats using a format string for columns?
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Can I use the DataFrame.style from inside the interpreter?
– Jms
Jan 10 '19 at 23:21
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Contains method for a slice
...thod is trivial to write, and mkb gave you a hint to use the binary search from the sort package. But if you are going to do a lot of such contains checks, you might also consider using a map instead.
It's trivial to check if a specific map key exists by using the value, ok := yourmap[key] idiom. S...
What is the explicit promise construction antipattern and how do I avoid it?
...need for a new question. I just thought it was a use-case you were missing from your answer. What I'm doing seems more like the opposite of aggregation, doesn't it?
– mhelvens
Sep 25 '14 at 19:43
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How to get rid of the 'undeclared selector' warning
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Have a look at NSSelectorFromString.
SEL selector = NSSelectorFromString(@"setError:");
if ([self respondsToSelector:selector])
It will allow you to create a selector at runtime, instead of at compile time through the @selector keyword, and the co...
How to increment a pointer address and pointer's value?
...ce but they are evaluated right-to-left. The code means "take the contents from where ptr points at, then increment ptr". It is very common C code (and yes, quite confusing). Please correct this and I'll remove the downvote. Same for *(ptr)++, the parenthesis does nothing.
– Lu...
TDD/BDD screencast/video resources [closed]
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Brett Schuchert from Object Mentor just posted a series of videos on TDD
The videos are meant to be watched in order.
GettingStarted
Adding Basic Operators
Removing Duplication
Extracting to Strategy
Removing Duplication via
Refactoring o...