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Infinite scrolling with React JS
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Basically when scrolling you want to decide which elements are visible and then rerender to display only those elements, with a single spacer element on top and bottom to represent the offscreen elements.
Vjeux made a fiddle here which you can look at: jsfiddle.
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Why does int num = Integer.getInteger(“123”) throw NullPointerException?
...u can use e.g. int Integer.parseInt(String).
References
Java Language Guide/Autoboxing
Integer API references
static int parseInt(String)
static Integer getInteger(String)
On Integer.getInteger
Here's what the documentation have to say about what this method does:
public static Integ...
MySQL: Transactions vs Locking Tables
...n. Given (as everyone knows these days) that banks are extraordinarily stupid, let's say their system works like this:
$balance = "GET BALANCE FROM your ACCOUNT";
if ($balance < $amount_being_paid) {
charge_huge_overdraft_fees();
}
$balance = $balance - $amount_being paid;
UPDATE your ACCOUN...
Non-type template parameters
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In C++20 this is now allowed provided that the type has strong structured equality, is a literal, no mutable/volatile subobjects and where the spaceship operator is public.
– Rakete1111
Sep 12 '18 at 13:30
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Why can I initialize a List like an array in C#?
...ed for each member of the initializer.
Thus, these two blocks are roughly identical:
List<int> a = new List<int> { 1, 2, 3 };
And
List<int> temp = new List<int>();
temp.Add(1);
temp.Add(2);
temp.Add(3);
List<int> a = temp;
You can call an alternate constructor if...
How do I enable TODO/FIXME/XXX task tags in Eclipse?
...he tasks. However, initially I was looking at the Task List window on the side of the screen.
– Jeff
Dec 8 '10 at 18:12
7
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Node.js: Difference between req.query[] and req.params
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Ah, ok, thanks, so both is provided by Express. And POST data I access via req.body.myParam?
– user1598019
Jan 19 '13 at 19:41
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Is there a performance difference between CTE , Sub-Query, Temporary Table or Table Variable?
...elling the SQL engine how to do the work.
As a general rule, it is a good idea to let the SQL engine and SQL optimizer find the best query plan. There are many person-years of effort that go into developing a SQL engine, so let the engineers do what they know how to do.
Of course, there are situa...
Default initialization of std::array?
...; the C++ language guarantees you that any object for which you do not provide an explicit initializer will be default initialized (C++11 §8.5/11). That includes objects of type std::array<T, N> and T[N].
Be aware that there are types for which default initialization has no effect and leaves...
What's the difference between interface and @interface in java?
...te I've been working on a small Java project this week, and using Intellij IDEA as my IDE, for a change of pace from my regular .Net development.
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