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PostgreSQL query to return results as a comma separated list
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You can use the array() and array_to_string() functions togetter with your query.
With SELECT array( SELECT id FROM table ); you will get a result like: {1,2,3,4,5,6}
Then, if you wish to remove the {} signs, you can just use the array_to_s...
Javascript !instanceof If Statement
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Enclose in parentheses and negate on the outside.
if(!(obj instanceof Array)) {
//...
}
In this case, the order of precedence is important (https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Operators/Operator_Precedence). The ! operator precedes the instanceof operator.
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Why use iterators instead of array indices?
... code to the particular implementation of the some_vector list. if you use array indices, it has to be some form of array; if you use iterators you can use that code on any list implementation.
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Convert objective-c typedef to its string equivalent
...t returns a string given an enum value. There are many ways to do this. An array of strings such that the enum value can be used as an index into the array or a map structure (e.g. an NSDictionary) that maps an enum value to a string work, but I find that these approaches are not as clear as a funct...
Find index of a value in an array
Can linq somehow be used to find the index of a value in an array?
8 Answers
8
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Create array of all integers between two numbers, inclusive, in Javascript/jQuery [duplicate]
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In JavaScript ES6:
function range(start, end) {
return Array(end - start + 1).fill().map((_, idx) => start + idx)
}
var result = range(9, 18); // [9, 10, 11, 12, 13, 14, 15, 16, 17, 18]
console.log(result);
For completeness, here it is with an optional step parameter...
PHP Function with Optional Parameters
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Make the function take one parameter: an array. Pass in the actual parameters as values in the array.
Edit: the link in Pekka's comment just about sums it up.
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Is it possible to delete an object's property in PHP?
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unset($a->new_property);
This works for array elements, variables, and object attributes.
Example:
$a = new stdClass();
$a->new_property = 'foo';
var_export($a); // -> stdClass::__set_state(array('new_property' => 'foo'))
unset($a->new_property);
v...
what is the best way to convert a json formatted key value pair to ruby hash with symbol as key?
... == Hash
new_hash[k.to_sym] = keys_to_symbol(v)
elsif v.class == Array
new_hash[k.to_sym] = keys_to_symbol_array(v)
else
raise ArgumentError, "Type not supported: #{v.class}"
end
end
return new_hash
end
def keys_to_symbol_array(array)
new_array = []
array.each ...
Nested JSON objects - do I have to use arrays for everything?
Is there any way to have nested objects in JSON so I don't have to make arrays out of everything? For my object to be parsed without error I seem to need a structure like this:
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