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Finding sum of elements in Swift array
...t 2:
let multiples = [...]
sum = multiples.reduce(0, combine: +)
Some more info:
This uses Array's reduce method (documentation here), which allows you to "reduce a collection of elements down to a single value by recursively applying the provided closure". We give it 0 as the initial value, a...
What is a bus error?
...nce bogus pointer.
using a null pointer.
overflowing a buffer.
PS: To be more precise this is not manipulating the pointer itself that will cause issues, it's accessing the memory it points to (dereferencing).
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How to get CSS to select ID that begins with a string (not in Javascript)?
... Thanks for the method and explanation, I've edited my question so its more clear. Out of curiosity, is there a way to match a string inside of the id's string?
– guptron
Jul 16 '12 at 14:12
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std::unique_lock or std::lock_guard?
...ck_guard with std::unique_lock. However, std::unique_lock might have a tad more overhead.
Note that these days one should use std::scoped_lock instead of std::lock_guard.
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Is there replacement for cat on Windows
...m with type in this situation is it adds unwanted file headers when typing more than one file specified on the command line.
– Greg Hewgill
Sep 13 '08 at 1:56
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How are echo and print different in PHP? [duplicate]
...orld"; And $ret will be 1. That means that print
can be used as part of a more complex expression where echo cannot. An
example from the PHP Manual:
$b ? print "true" : print "false";
print is also part of the precedence table which it needs to be if it
is to be used within a complex expressi...
Find and extract a number from a string
... @ayman: Oh, the commas are thousands separators? That will require a much more complex regex - which should be dealt with in a separate question. An excellent starting point is Regular-Expressions.info which also contains sections on .NET's regex engine.
– Tim Pietzcker
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How can I get the external SD card path for Android 4.0+?
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Bootstrap dropdown sub menu missing
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Conveniently Declaring Compile-Time Strings in C++
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