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I want to get the type of a variable at runtime
I want to get the type of a variable at runtime.
How do I do this?
4 Answers
4
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Sort array by firstname (alphabetically) in Javascript
I got an array (see below for one object in the array) that I need to sort by firstname using JavaScript.
How can I do it?
...
Swapping two variable value without using third variable
... y have different memory locations (rather than different values). This is because (p xor p) = 0 and if both x and y share the same memory location, when one is set to 0, both are set to 0.
When both *x and *y are 0, all other xor operations on *x and *y will equal 0 (as they are the same), which me...
Why does string::compare return an int?
...er than 0, not necessarily -1 or 1.
Secondly, return values are rvalues, subject to integral
promotion, so there's no point in returning anything smaller.
In C++ (as in C), every expression is either an rvalue or an
lvalue. Historically, the terms refer to the fact that lvalues
appear on the left...
How do I detect unsigned integer multiply overflow?
I was writing a program in C++ to find all solutions of a b = c , where a , b and c together use all the digits 0-9 exactly once. The program looped over values of a and b , and it ran a digit-counting routine each time on a , b and ab to check if the digits condition was satisfied.
...
LISTAGG in Oracle to return distinct values
...c and later:
select listagg(distinct the_column, ',') within group (order by the_column)
from the_table
18c and earlier:
select listagg(the_column, ',') within group (order by the_column)
from (
select distinct the_column
from the_table
) t
If you need more columns, something like this ...
Multiple left-hand assignment with JavaScript
...
function good() {
var var1 = 1, var2 = 1, var3 = 1;
}
function bad() {
var var1 = var2 = var3 = 1;
}
good();
console.log(window.var2); // undefined
bad();
console.log(window.var2); // 1. Aggh!
Actually this shows that assignment are right associative. The bad example i...
How to find the kth smallest element in the union of two sorted arrays?
...
You've got it, just keep going! And be careful with the indexes...
To simplify a bit I'll assume that N and M are > k, so the complexity here is O(log k), which is O(log N + log M).
Pseudo-code:
i = k/2
j = k - i
step = k/4
while step > 0
if a[i-1]...
Convert a Python list with strings all to lowercase or uppercase
I have a python list variable that contains strings. Is there a python function that can convert all the strings in one pass to lowercase and vice versa, uppercase?
...
Convert nullable bool? to bool
How do you convert a nullable bool? to bool in C#?
11 Answers
11
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