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Remove the last line from a file in Bash
...sed versions older than 3.95, so you have to use it as a filter with a temporary file:
cp foo.txt foo.txt.tmp
sed '$ d' foo.txt.tmp > foo.txt
rm -f foo.txt.tmp
Of course, in that case you could also use head -n -1 instead of sed.
MacOS:
On Mac OS X (as of 10.7.4), the equivalent of the sed -...
How to display nodejs raw Buffer data as Hex string
The following code uses SerialPort module to listen to data from a bluetooth connection.
2 Answers
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How to check if a value exists in a dictionary (python)
...on is that each of the above returns a different type of object, which may or may not be well suited for lookup operations:
>>> type(d.viewvalues())
<type 'dict_values'>
>>> type(d.values())
<type 'list'>
>>> type(d.itervalues())
<type 'dictionary-valueiter...
jQuery - hashchange event
...
You can detect if the browser supports the event by:
if ("onhashchange" in window) {
//...
}
See also:
Detecting event support without browser sniffing
Emulating onhashchange without setInterval
window.onhashchange
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How to correct TypeError: Unicode-objects must be encoded before hashing?
I have this error:
10 Answers
10
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List of Big-O for PHP functions
After using PHP for a while now, I've noticed that not all built-in PHP functions are as fast as expected. Consider these two possible implementations of a function that finds if a number is prime using a cached array of primes.
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What's the optimum way of storing an NSDate in NSUserDefaults?
There's two ways of storing an NSDate in NSUserDefaults that I've come across.
4 Answers
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What is the preferred Bash shebang?
Is there any Bash shebang objectively better than the others for most uses?
5 Answers
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Difference between Java SE/EE/ME?
...with some basics, so I will write simple programs that create files, directories, edit XML files and so on, nothing too complex for now.
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How to print a number with commas as thousands separators in JavaScript
...trying to print an integer in JavaScript with commas as thousands separators. For example, I want to show the number 1234567 as "1,234,567". How would I go about doing this?
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