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Unix command to find lines common in two files
I'm sure I once found a unix command which could print the common lines from two or more files, does anyone know its name? It was much simpler than diff .
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How to create a string with format?
I need to create a string with format which can convert int, long, double etc. types into string. Using Obj-C, I can do it via below way.
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In PHP, what is a closure and why does it use the “use” identifier?
I'm checking out some PHP 5.3.0 features and ran across some code on the site that looks quite funny:
6 Answers
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YYYY-MM-DD format date in shell script
...$(date) in my bash shell script, however, I want the date in YYYY-MM-DD format.
How do I get this?
13 Answers
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Dashed line border around UIView
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yourViewBorder.strokeColor = [UIColor blackColor].CGColor;
yourViewBorder.fillColor = nil;
yourViewBorder.lineDashPattern = @[@2, @2];
yourViewBorder.frame = yourView.bounds;
yourViewBorder.path = [UIBezierPath bezierPathWithRect:yourView.bounds].CGPath;
[yourView.layer addSublayer:yourViewBorder];...
Copying files from host to Docker container
I am trying to build a backup and restore solution for the Docker containers that we work with.
41 Answers
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How to tell if a tag failed to load
...page's <head> , and I'd like to be able to tell whether the loading failed in some way -- a 404, a script error in the loaded script, whatever.
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Decorators with parameters?
I have a problem with the transfer of variable 'insurance_mode' by the decorator. I would do it by the following decorator statement:
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Count occurrences of a char in a string using Bash
I need to count the number of occurrences of a char in a string using Bash.
7 Answers
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What are copy elision and return value optimization?
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Introduction
For a technical overview - skip to this answer.
For common cases where copy elision occurs - skip to this answer.
Copy elision is an optimization implemented by most compilers to prevent extra (potentially expensive) copies i...