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How to atomically delete keys matching a pattern using Redis
...lua scripts, which execute atomically. I have never written one, but I think it would look something like this
EVAL "return redis.call('del', unpack(redis.call('keys', ARGV[1])))" 0 prefix:[YOUR_PREFIX e.g delete_me_*]
Warning: As the Redis document says, because of performance maters, keys
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Ignoring directories in Git repositories on Windows
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Peter Mortensen
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answered Dec 5 '08 at 12:54
stewstew
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How to extract one column of a csv file
If I have a csv file, is there a quick bash way to print out the contents of only any single column? It is safe to assume that each row has the same number of columns, but each column's content would have different length.
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Reorder levels of a factor without changing order of values
...edited Mar 20 '16 at 11:39
Henrik
52.1k1111 gold badges117117 silver badges134134 bronze badges
answered Mar 3 '10 at 23:34
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disable textbox using jquery?
I have three radio buttons with same name and different values.When I click the third radio button the checkbox and textbox going to be disabled.but when I choose other two radio buttons it must be show.I need the help in Jquery.Thanks in advance....
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What is the best way to add options to a select from a JavaScript object with jQuery?
...same as other answers, in a jQuery fashion:
$.each(selectValues, function(key, value) {
$('#mySelect')
.append($("<option></option>")
.attr("value", key)
.text(value));
});
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How to check if two arrays are equal with JavaScript? [duplicate]
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enyoenyo
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Last iteration of enhanced for loop in java
... a way to determine if the loop is iterating for the last time. My code looks something like this:
21 Answers
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How to break out of nested loops?
If I use a break statement, it will only break inner loop and I need to use some flag to break the outer loop. But if there are many nested loops, the code will not look good.
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Assign a variable inside a Block to a variable outside a Block
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You need to use this line of code to resolve your problem:
__block Person *aPerson = nil;
For more details, please refer to this tutorial: Blocks and Variables
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