You can’t do what you’re trying to do: bash arrays are one-dimensional $ declare -A PERSONS $ declare -A PERSON $ PERSON[“FNAME”]=’John’ $ PERSON[“LNAME”]=’Andrew’ $ declare -p PERSON declare -A PERSON='([FNAME]=”John” [LNAME]=”Andrew” )’ $ PERSONS[1]=([FNAME]=”John” [LNAME]=”Andrew” ) bash: PERSONS[1]: cannot assign list to array member You can fake multidimensionality by composing a suitable array index … Read more
array_keys is your friend: $pets = array( “cats” => 1, “dogs” => 2, “fish” => 3 ); array_keys($pets, min($pets)); # array(‘cats’) P.S.: there is a dup here somewhere on SO (it had max instead of min, but I can distinctly remember it).
I believe you want to use array_diff_assoc http://www.php.net/manual/en/function.array-diff-assoc.php
$a = array(‘a’ => ‘abc’) + ($condition ? array(‘b’ => ‘xyz’) : array());
Two values from key => value pairs are considered equal only if (string) $elem1 === (string) $elem2 . In other words a strict check takes place so the string representations must be the same. http://php.net/manual/en/function.array-diff-assoc.php The (string) value of any array is “Array”. Thus, your call to array_diff_assoc is effectively comparing these two things: Array … Read more
It’s a matter of what are you going to do with your lookup. If it’s just a lookup of key -> value pairs – array is a way to go If you want to perform different actions based on the key – it’s actually a good use case for Strategy pattern – no case or … Read more
Within your user defined array you are assigning the keys manually your array means as array(1 => ‘One’,3, 2 => ‘Two’);//[1] => One [2] => 3 [2] => Two Here we have two identical index and as per DOCS its mentioned that the last overwrite the first Syntax “index => values”, separated by commas, define … Read more
In bash 4.2 or later, you can use the -v option: [[ -v FOO[@] ]] && echo “FOO set” Note that in any version, using declare -A FOO doesn’t actually create an associative array immediately; it just sets an attribute on the name FOO which allows you to assign to the name as an associative … Read more
In your case, I wonder if simply using isset() makes more sense, i.e. isset($a[$key])
Everything in JavaScript is an object. In the case of an Array, the length property returns the size of the internal storage area for indexed items of the array. Some of the confusion may come into play in that the [] operator works for both numeric and string arguments. For an array, if you use … Read more