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What is the best way to ensure only one instance of a Bash script is running? [duplicate]
...st way to ensure only one instance of a given script is running - assuming it's Bash on Linux?
14 Answers
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Shuffle an array with python, randomize array item order with python
What's the easiest way to shuffle an array with python?
11 Answers
11
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How to execute a MySQL command from a shell script?
How can I execute an SQL command through a shell script so that I can make it automated?
14 Answers
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Relation between CommonJS, AMD and RequireJS?
...S implements the AMD API (source).
CommonJS is a way of defining modules with the help of an exports object, that defines the module contents. Simply put, a CommonJS implementation might work like this:
// someModule.js
exports.doSomething = function() { return "foo"; };
//otherModule.js
var some...
Why does Windows64 use a different calling convention from all other OSes on x86-64?
...on that describes the calling convention to use on x86-64. All OSes follow it, except for Windows which has it's own x86-64 calling convention. Why?
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What does the question mark and the colon (?: ternary operator) mean in objective-c?
...rnary operator (Objective-C is a superset of C):
label.frame = (inPseudoEditMode) ? kLabelIndentedRect : kLabelRect;
is semantically equivalent to
if(inPseudoEditMode) {
label.frame = kLabelIndentedRect;
} else {
label.frame = kLabelRect;
}
The ternary with no first element (e.g. variable ?:...
Isn't it silly that a tiny favicon requires yet another HTTP request? How can I put the favicon into
... that these browsers still can't:
Safari
iOS Safari
Firefox for Android
With the above in mind, we can now use SVG Favicons with a reasonable degree of confidence.
2) Present the SVG as a Data URI
The main objective here is to avoid HTTP Requests.
As other solutions on this page have mentioned, a...
JUnit: how to avoid “no runnable methods” in test utils classes
I have switched to JUnit4.4 from JUnit3.8. I run my tests using ant, all my tests run successfully but test utility classes fail with "No runnable methods" error. The pattern I am using is to include all classes with name *Test* under test folder.
...
Abstract classes in Swift Language
...e a way to create an abstract class in the Swift Language, or is this a limitation just like Objective-C? I'd like to create a abstract class comparable to what Java defines as an abstract class.
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What is the correct SQL type to store a .Net Timespan with values > 24:00:00?
...
I'd store it in the database as a BIGINT and I'd store the number of ticks (eg. TimeSpan.Ticks property).
That way, if I wanted to get a TimeSpan object when I retrieve it, I could just do TimeSpan.FromTicks(value) which would be easy...