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How do you check that a number is NaN in JavaScript?
...idn't realize this until @allsyed commented, but this is in the ECMA spec: https://tc39.github.io/ecma262/#sec-isnan-number
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How do you check if a certain index exists in a table?
...s syntax is available since SQL Server 2016. Documentation for IF EXISTS:
https://blogs.msdn.microsoft.com/sqlserverstorageengine/2015/11/03/drop-if-exists-new-thing-in-sql-server-2016/
In case you deal with a primery key instead, then use this:
ALTER TABLE [TableName] DROP CONSTRAINT IF EXISTS [...
What's your favorite “programmer” cartoon?
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Oh! There can be only one:
It's sooo funny, because it's true :)
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edited Feb 8 '17 at 14:08
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Ruby ampersand colon shortcut [duplicate]
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Fun to see the [*3..7] syntax. I didn't realize you could splat like that!
– Ben Coppock
Jul 11 '19 at 4:54
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How do I find the maximum of 2 numbers?
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Use the builtin function max.
Example:
max(2, 4) returns 4.
Just for giggles, there's a min as well...should you need it. :P
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Ruby array to string conversion
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I'll join the fun with:
['12','34','35','231'].join(', ')
EDIT:
"'#{['12','34','35','231'].join("', '")}'"
Some string interpolation to add the first and last single quote :P
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How to sort ArrayList in decreasing order?
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Java 8
well doing this in java 8 is so much fun and easier
Collections.sort(variants,(a,b)->a.compareTo(b));
Collections.reverse(variants);
Lambda expressions rock here!!!
in case you needed a more than one line logic for comparing a and b you could write it li...
JUnit Testing Exceptions [duplicate]
...xample == null) {
throw new NullPointerException();
}
//do fun things with valid example here
}
Then, when you run this JUnit test you will get a green bar:
@Test(expected = NullPointerException.class)
public void constructorShouldThrowNullPointerException() {
Example example ...
print memory address of Python variable [duplicate]
...4
print hex(id(x))
Gave me:
0x9cf10c
Which is what you want, right?
(Fun fact, binding two variables to the same int may result in the same memory address being used.)
Try:
x = 4
y = 4
w = 9999
v = 9999
a = 12345678
b = 12345678
print hex(id(x))
print hex(id(y))
print hex(id(w))
print hex(id(...
Remove a prefix from a string [duplicate]
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Cool! Note: the behavior of the new function is exactly as in this answer (returning the string unchanged if it does not start with prefix)
– Elazar
May 27 at 23:50
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