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Run cron job only if it isn't already running
... sort of watchdog for a daemon that I've created. If the daemon errors out and fails, I want the cron job to periodically restart it... I'm not sure how possible this is, but I read through a couple of cron tutorials and couldn't find anything that would do what I'm looking for...
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Why does String.valueOf(null) throw a NullPointerException?
...ring.valueOf(Object)
String.valueOf(char[])
Java Specification Language mandates that in these kind of cases, the most specific overload is chosen:
JLS 15.12.2.5 Choosing the Most Specific Method
If more than one member method is both accessible and applicable to a method invocation, it is n...
How do I delete all messages from a single queue using the CLI?
...lete all messages from a single queue using the cli?
I have the queue name and I want to clean it.
9 Answers
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How to export all collections in MongoDB?
I want to export all collections in MongoDB by the command:
26 Answers
26
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Passing arguments to C# generic new() of templated type
...le to be in an invalid state by side effects. I also like to use that Func and lambda, but I know it still is a problem in bussiness world as generally programmers don't know lambdas yet and this makes your class harder to understand.
– Tuomas Hietanen
Dec 8 '0...
What does the JSLint error 'body of a for in should be wrapped in an if statement' mean?
...sole.log([0, 5, 0, 3, 0, 1, 0].filter_0());
//prints [5,3,1]
This is a standard way to extend objects and add new methods. Lots of libraries do this.
However, let's look at how for in works now:
var listeners = ["a", "b", "c"];
for (o in listeners) {
console.log(o);
}
//prints:
// 0
// 1
//...
How to export and import a .sql file from command line with options? [duplicate]
... Duplicate! looking for some feature have phpmyadmin during export in command line
8 Answers
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Why am I getting error for apple-touch-icon-precomposed.png
...ollowing logs many times in my server logs. Why I am getting these request and how can I avoid these?
11 Answers
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Apply multiple functions to multiple groupby columns
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The second half of the currently accepted answer is outdated and has two deprecations. First and most important, you can no longer pass a dictionary of dictionaries to the agg groupby method. Second, never use .ix.
If you desire to work with two separate columns at the same time I wou...
How to use radio on change event?
...
Note that you are comparing the value against allot in both if statements and :radio selector is deprecated.
In case that you are not using jQuery, you can use the document.querySelectorAll and HTMLElement.addEventListener methods:
var radios = document.querySelectorAll('input[type=radio][name="b...