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Guid is all 0's (zeros)?
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answered Nov 1 '11 at 20:00
Mark ByersMark Byers
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What does value & 0xff do in Java?
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173
It sets result to the (unsigned) value resulting from putting the 8 bits of value in the lowes...
Returning value from called function in a shell script
...also true for some other shells.
Here's how to do each of those options:
1. Echo strings
lockdir="somedir"
testlock(){
retval=""
if mkdir "$lockdir"
then # Directory did not exist, but it was created successfully
echo >&2 "successfully acquired lock: $lockdir"
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How to capitalize the first letter of word in a string using Java?
... named input and leave the rest alone:
String output = input.substring(0, 1).toUpperCase() + input.substring(1);
Now output will have what you want. Check that your input is at least one character long before using this, otherwise you'll get an exception.
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Seedable JavaScript random number generator
...e JavaScript Math.random() function returns a random value between 0 and 1, automatically seeded based on the current time (similar to Java I believe). However, I don't think there's any way to set you own seed for it.
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List files by last edited date
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172
You can use:
ls -Rt
where -R means recursive (include subdirectories) and -t means "sort by...
Equation (expression) parser with precedence?
...ce you need to think recursively, for example, using your sample string,
1+11*5
to do this manually, you would have to read the 1, then see the plus and start a whole new recursive parse "session" starting with 11... and make sure to parse the 11 * 5 into its own factor, yielding a parse tree wi...
How do I prompt for Yes/No/Cancel input in a Linux shell script?
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31 Answers
31
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In Mongoose, how do I sort by date? (node.js)
...releases such that some of these answers are no longer valid. As of the 4.1.x release of Mongoose, a descending sort on the date field can be done in any of the following ways:
Room.find({}).sort('-date').exec(function(err, docs) { ... });
Room.find({}).sort({date: -1}).exec(function(err, docs) { ...
Algorithm to generate all possible permutations of a list?
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