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Hash String via SHA-256 in Java
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@BrendanLong Now, How to retrieval digest to String again?
– Sajad
Oct 22 '13 at 19:22
1
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Shell one liner to prepend to a file
...table, and should not be relied upon for anything even vaguely important.
Now, with all that out of the way the answer was:
Creating another file descriptor for the file (exec 3<> yourfile) thence writing to that (>&3) seems to overcome the read/write on same file dilemma. Works for...
View HTTP headers in Google Chrome?
Till 9.x, the headers were under the resources in the Developer Tools, but now I can't find it anywhere.
8 Answers
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How to fix the uninitialized constant Rake::DSL problem on Heroku?
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Thank you. That fixed my problems and I didn't know what was going on. (Using the rails installer on windows and deploying to heroku, as a complete beginner.)
– Jack V.
Jun 14 '11 at 22:46
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Two-dimensional array in Swift
...[0] += [345, 678]
If you had 3x2 array of 0(zeros) before these changes, now you have:
[
[0, 0, 234, 345, 678], // 5 elements!
[123, 456, 789],
[0, 0]
]
So be aware that sub arrays are mutable and you can redefine initial array that represented matrix.
Examine size/bounds before access...
How do I make an HTML text box show a hint when empty?
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That is known as a textbox watermark, and it is done via JavaScript.
http://naspinski.net/post/Text-Input-Watermarks-using-Javascript-(IE-Compatible).aspx
or if you use jQuery, a much better approach:
http://digitalbush.com/proj...
How to place the ~/.composer/vendor/bin directory in your PATH?
...thods to install Laravel to no avail. Error messages everything I try. I'm now trying the first method in the quickstart documentation, that is, via Laravel Installer, but it says to "Make sure to place the ~/.composer/vendor/bin directory in your PATH so the Laravel executable is found when you...
hasNext in Python iterators?
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@Giorgio, there is no way to know whether another element exists without executing the code that generates it (you don't know whether the generator will execute yield or not). It is, of course, not difficult to write an adaptor that stores the result of n...
Get url without querystring
...omponent( is another awesome method for getting parts of a Uri. I didn't know about these two until now!
– AaronLS
Oct 19 '17 at 21:06
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Unlimited Bash History [closed]
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After many large, ugly iterations and weird edge cases over the years, I now have a concise section of my .bashrc dedicated to this.
First, you must comment out or remove this section of your .bashrc (default for Ubuntu). If you don't, then certain environments (like running screen sessions) will...