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Accessing bash command line args $@ vs $*
In many SO questions and bash tutorials I see that I can access command line args in bash scripts in two ways:
5 Answers
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How to check if an object is serializable in C#
...s it not the case that we must recursively drill into that objects members and check each one, if not just try to serialize it and see if it fails?
– Brian Sweeney
Jan 26 '11 at 18:34
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MySQL - ORDER BY values within IN()
...erformance-wise to have an indexed column that represents your sort order, and then sort by this column.
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No Exception while type casting with a null in java
...ally print methods call String.valueOf(object) method on the input object. And in valueOf method, this check helps to avoid null pointer exception:
return (obj == null) ? "null" : obj.toString();
For rest of your confusion, calling any method on a null object should throw a null pointer exception...
Is it better to reuse a StringBuilder in a loop?
...e of StringBuilder.
In a very long loop I'm manipulating a StringBuilder and passing it to another method like this:
14 A...
map function for objects (instead of arrays)
...For that matter I wanted to add another solution that returns a new object and leaves the original object as it is:
var myObject = { 'a': 1, 'b': 2, 'c': 3 };
// returns a new object with the values at each key mapped using mapFn(value)
function objectMap(object, mapFn) {
return Object.k...
Sqlite primary key on multiple columns
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@pratnala In standard SQL, yes. In SQLite, NULL is allowed in primary keys. This answer emphasizes that if you want more standard behavior, you need to add the NOT NULL yourself. My answer is just the very basic syntax for a multi-column pr...
PHP Timestamp into DateTime
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Note that new DateTime('@' . $timestamp) and $dt = new DateTime(); $dt->setTimestamp($timestamp) don't deal with timezones the same way. See my answer @ stackoverflow.com/questions/12038558/… for more details.
– John Slegers
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What do I return if the return type of a method is Void? (Not void!)
... a function has to be Void?
Use return null. Void can't be instantiated and is merely a placeholder for the Class<T> type of void.
What's the point of Void?
As noted above, it's a placeholder. Void is what you'll get back if you, for example, use reflection to look at a method with a ...
How to define a function in ghci across multiple lines?
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For guards (like your example), you can just put them all on one line and it works (guards do not care about spacing)
let abs n | n >= 0 = n | otherwise = -n
If you wanted to write your function with multiple definitions that pattern match on the arguments, like this:
fact 0 = 1
fact n =...