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C/C++ macro string concatenation
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If they're both strings you can just do:
#define STR3 STR1 STR2
The preprocessor automatically concatenates adjacent strings.
EDIT:
As noted below, it's not the preprocessor but the compiler that does the concatenation.
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onclick() and onblur() ordering issue
...e a few a drawbacks. Most notably I often click then drag off the button if I've misclicked, which prevents onclick being called - if the button performs a non-Pure function (delete, post etc) you might want to preserve this and go with the flag approach.
– Brizee
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Writing to an Excel spreadsheet
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You might want to mention that if you are running Python on Windows and have Excel installed on the same machine, you can use the Python COM interface to directly control Excel.
– Michael Dillon
Nov 18 '12 at 6:04
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JavaScript function to add X months to a date
...ar d = date.getDate();
date.setMonth(date.getMonth() + +months);
if (date.getDate() != d) {
date.setDate(0);
}
return date;
}
// Add 12 months to 29 Feb 2016 -> 28 Feb 2017
console.log(addMonths(new Date(2016,1,29),12).toString());
// Subtract 1 month from 1 Jan...
Check if a string is html or not
I have a certain string for which I want to check if it is a html or not. I am using regex for the same but not getting the proper result.
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Windows batch: call more than one command in a FOR loop?
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@jww && will fail if the first command fails, & will execute the second command regardless.
– yyny
Mar 14 '16 at 21:27
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How to get all of the immediate subdirectories in Python
...scandir:
list_subfolders_with_paths = [f.path for f in os.scandir(path) if f.is_dir()]
Bonus: With scandir you can also simply only get folder names by using f.name instead of f.path.
This (as well as all other functions below) will not use natural sorting. This means results will be sorted lik...
Can I change the viewport meta tag in mobile safari on the fly?
I have an AJAX app built for mobile Safari browser that needs to display different types of content.
3 Answers
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What's the difference between NOT EXISTS vs. NOT IN vs. LEFT JOIN WHERE IS NULL?
...S vs. LEFT JOIN / IS NULL: MySQL
In a nutshell:
NOT IN is a little bit different: it never matches if there is but a single NULL in the list.
In MySQL, NOT EXISTS is a little bit less efficient
In SQL Server, LEFT JOIN / IS NULL is less efficient
In PostgreSQL, NOT IN is less efficient
In Oracl...
Have a reloadData for a UITableView animate when changing
...ITableView that has two modes. When we switch between the modes I have a different number of sections and cells per section. Ideally, it would do some cool animation when the table grows or shrinks.
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