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How to get the difference between two arrays of objects in JavaScript
... @ScottSauyet: It's taken a while for me to find this answer again, but now it's quite a bit better :D
– Cerbrus
Jul 12 '17 at 14:45
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How do I specify unique constraint for multiple columns in MySQL?
...mple:
PRODUCT_NAME, PRODUCT_VERSION
'glass', null
'glass', null
'wine', 1
Now if you try to insert ('wine' 1) again it will report a constraint violation
Hope this helps
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How do I put variables inside javascript strings?
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This is now (2017) the correct answer. Be aware that you will need Babel in your toolchain to support older browsers.
– superluminary
Sep 13 '17 at 8:17
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Matlab: Running an m-file from command-line
..., end, exit"
I found the original reference here. Since original link is now gone, here is the link to an alternate newreader still alive today:
exit matlab when running batch m file
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Pretty-print C++ STL containers
... printer( os, *begin );
}
return os << range.close;
}
Now by default it will work for maps as long as the key and value types are both printable and you can put in your own special item printer for when they are not (as you can with any other type), or if you do not want = as th...
Why do people say there is modulo bias when using a random number generator?
...t defined in cstdlib (see this article for a general overview on rand()).
Now what happens if you want to generate a random number between say 0 and 2? For the sake of explanation, let's say RAND_MAX is 10 and I decide to generate a random number between 0 and 2 by calling rand()%3. However, rand()...
How do I programmatically click a link with javascript?
... case that's in the question, where I want to click a link. The link leads nowhere, but has other things tied to the click event. I don't want to change location.
– Random Elephant
Jan 8 at 13:03
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Chain-calling parent initialisers in python [duplicate]
...l return the init method of your obj as if init in class X not been there. Now, if class X has two parents, and X.__init__ doesnt exist, the default behavior is to call init of only one of the parents, not both. This is effectively what super is doing... giving you one of the parents.
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Is “double hashing” a password less secure than just hashing it once?
...rse the key derivation is discovered, an attacker still has to complete a known-plaintext attack.
How to break a password
Stored passwords need protection from an offline attack. If passwords aren't salted, they can be broken with a pre-computed dictionary attack (for example, using a Rainbow Tabl...
Java 8 stream's .min() and .max(): why does this compile?
...unctionality works in Java 8. It relies on a concept which is informally known as "single abstract method" interfaces, or "SAM" interfaces. The idea is that any interface with one abstract method can be automatically implemented by any lambda - or method reference - whose method signature is a mat...