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Unpacking, extended unpacking and nested extended unpacking
...the length of this post, but I decided to opt for completeness.
Once you know a few basic rules, it's not hard to generalize them. I'll do my best to explain with a few examples. Since you're talking about evaluating these "by hand," I'll suggest some simple substitution rules. Basically, you might...
Maximum single-sell profit
...pective max and min.
If we use this approach, our recurrence relation is now
T(1) <= O(1)
T(n) <= 2T(n / 2) + O(1)
Using the Master Theorem here gives us a runtime of O(n) with O(lg n) space, which is even better than our original solution!
But wait a minute - we can do even better than ...
How to get current formatted date dd/mm/yyyy in Javascript and append it to an input [duplicate]
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new Date(Date.now()).toLocaleString();
– Oded Breiner
Jul 18 '16 at 17:15
14
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What is the difference between typeof and instanceof and when should one be used vs. the other?
... instanceof Object returns false, and doesn't throw an exception. I don't know how recent that change is, but it makes instanceof more appealing.
– Cypress Frankenfeld
Jun 26 '13 at 16:01
...
MongoDB: update every document on one field
...n, for your example, the <update> is:
{ $set: { lastLookedAt: Date.now() / 1000 } }
However, depending on your version of MongoDB, the query will look different. Regardless of version, the key is that the empty condition {} will match any document. In the Mongo shell, or with any MongoDB ...
JavaScript ternary operator example with functions
...unction() ? imlost() : whathappuh() : lostinsyntax() : thisisprobablybrokennow() ? //I'm lost in my own (awful) example by now.
//Not complete... or for average humans to read.
if(this != that) //Ternary would be done by now
{
x = this;
}
else
}
x = this + 2;
}
A really basic rule of thu...
What is an invariant?
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It is a condition you know to always be true at a particular place in your logic and can check for when debugging to work out what has gone wrong.
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How to get the last day of the month?
...s **kwargs I wouldn't rely on that and do a series of separate operations: now + relative(months=+1) + relative(day=1) + relative(days=-1) which is unambiguous.
– Alfe
Sep 24 '19 at 10:07
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How do I update zsh to the latest version?
... worth fixing whatever problems you're having with it. That said, I don't know that I want to use it to replace Apple's zsh...
– Marnen Laibow-Koser
Dec 3 '13 at 16:00
3
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How does `is_base_of` work?
...tness anymore. In an ordinary overload resolution scenario, the call would now be ambiguous because normally the return type won't participate in overload resolution. For conversion functions, however, there is a backdoor. If two conversion functions are equally good, then the return type of them de...