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Python list iterator behavior and next(iterator)
... it is, I can remember mentioning exactly this interpreter behavior to someone perhaps a week ago.
– lvc
May 29 '13 at 13:30
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Create RegExps on the fly using string variables
...fortunately, there's not a built-in function to do this for you, so here's one you can use:
function escapeRegExp(s) {
return s.replace(/[-/\\^$*+?.()|[\]{}]/g, '\\$&')
}
Note also that when you use a RegExp in replace(), the replacement string now has a special character too, $. This mus...
or (HTML5)
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Can someone point me to <menu> in one of the W3C HTML5 specs? I'm finding it in the WHAT WG version, but not in the latest W3C HTML 5.3 draft.
– Garret Wilson
Feb 21 at 2:10
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How do I write a short literal in C++?
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When you trace one of the suffixes, you'll see that e.g. ""ui8 is defined as '\000', which is essentially '\0'.
– Nikita
Jan 28 '17 at 19:03
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What is the difference between BIT and TINYINT in MySQL?
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As far as actual storage, BIT(1) still occupies one byte minimum. BIT(M) = (M+7)/8 bytes. (1+7)/8 = 1 byte. See Numeric Type Storage Requirements.
– Drazen Bjelovuk
Aug 11 '17 at 14:52
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What is the difference between persist() and merge() in JPA and Hibernate?
...in the persistence context, already exists in persistence context, the new one is ignored. (NOTHING happened)
But in case of merge method, the entity that is already managed in persistence context will be replaced by the new entity (updated) and a copy of this updated entity will return back. (from ...
In Intellij, how do I toggle between camel case and underscore spaced?
... history_of_present_illness . Is there a keyboard shortcut to switch from one to the other when I have the phrase highlighted? Or perhaps a plugin that can do this?
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Anonymous recursive PHP functions
...unction from Haskell is known more generally as the Y combinator, which is one of the most well-known fixed point combinators.
A fixed point is a value that is unchanged by a function: a fixed point of a function f is any x such that x = f(x). A fixed point combinator y is a function that return...
Can an enum class be converted to the underlying type?
...(BTW, you have constexpr as well in the future; in fact much more powerful one than what I had in 2013 :P)
– Nawaz
Nov 21 '19 at 5:00
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Convert data.frame column format from character to factor
...tr(mtcars) #allows you to see the classes of the variables (all numeric)
#one approach it to index with the $ sign and the as.factor function
mtcars$am <- as.factor(mtcars$am)
#another approach
mtcars[, 'cyl'] <- as.factor(mtcars[, 'cyl'])
str(mtcars) # now look at the classes
This also wo...