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What is the PostgreSQL equivalent for ISNULL()
In MS SQL-Server, I can do:
5 Answers
5
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What’s the difference between “Array()” and “[]” while declaring a JavaScript array?
...no difference in that example.
Using the more verbose method: new Array() does have one extra option in the parameters: if you pass a number to the constructor, you will get an array of that length:
x = new Array(5);
alert(x.length); // 5
To illustrate the different ways to create an array:
var...
JavaScript checking for null vs. undefined and difference between == and ===
...
How do I check a variable if it's null or undefined...
Is the variable null:
if (a === null)
// or
if (a == null) // but see note below
...but note the latter will also be true if a is undefined.
Is it undefined:
if (typeo...
Performance of Find() vs. FirstOrDefault() [duplicate]
...e whereas Find is called as a method on the source list.
So, what is find doing? This is the decompiled Find method
private T[] _items;
[__DynamicallyInvokable]
public T Find(Predicate<T> match)
{
if (match == null)
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.match);
fo...
Another Repeated column in mapping for entity error
...ct reference to the entity. Remove the customerId field, it's useless. And do the same for productId. If you want the customer ID of a sale, you just need to do this:
sale.getCustomer().getId()
share
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commands not found on zsh
...ent that you've managed to mess up your PATH variable. (Your current PATH doesn't contain any location where common utilities are located.)
Try:
PATH=/bin:/usr/bin:/usr/local/bin:${PATH}
export PATH
Alternatively, for "resetting" zsh, specify the complete path to the shell:
exec /bin/zsh
or
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Flexbox: center horizontally and vertically
...
Flex items do not need to be block level unless the content they contain requires it. Also, you've prefixed all of the display properties, but didn't prefix any of the other Flexbox properties (which have different names in the other d...
Sorting 1 million 8-decimal-digit numbers with 1 MB of RAM
...e data, but that is not strictly true.
One way around your problem is to do the following horrible thing, which should not be attempted by anyone under any circumstances: Use the network traffic to store data. And no, I don't mean NAS.
You can sort the numbers with only a few bytes of RAM in the ...
What is the difference between range and xrange functions in Python 2.X?
...is faster but I have no idea why it's faster (and no proof besides the anecdotal so far that it is faster) or what besides that is different about
...
outline on only one border
..., but just only on one side of it.
Until now, I've been using an image to do that (GIF/PNG) that I would then use as a background and stretch it (repeat-x) and position a little off from the top of my block.
Recently, I discovered the outline CSS property, which is great! But seems to circle the ...