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What is the most efficient way to concatenate N arrays?
...N is not known ahead of time such as when you have an array of arrays of arbitrary length and you want them all concatenated.
– jfriend00
Jul 9 '16 at 16:05
3
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What are five things you hate about your favorite language? [closed]
... modern age (still no threads or network by default?)
Lots of nasty little bits of C poking through (in particular, all the conversions between short/int/unsigned/etc..)
share
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Cartesian product of multiple arrays in JavaScript
...t for really good answer. although I would like to ask you to improve it a bit to get rig of warning of shadowed variables (2 local vars a and 2 local vars b)
– ZuBB
May 29 '17 at 8:14
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How might I convert a double to the nearest integer value?
...(d);
Reference
Handles rounding like so:
rounded to the nearest 32-bit signed integer. If value is halfway
between two whole numbers, the even number is returned; that is, 4.5
is converted to 4, and 5.5 is converted to 6.
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What are Runtime.getRuntime().totalMemory() and freeMemory()?
...y lazily. Lets say you start your Java process as such:
java -Xms64m -Xmx1024m Foo
Your process starts with 64mb of memory, and if and when it needs more (up to 1024m), it will allocate memory. totalMemory() corresponds to the amount of memory currently available to the JVM for Foo. If the JVM...
How to get a list of column names on Sqlite3 database?
...work create temporary table TmpCols (cid integer, name text, type text, nn bit, dflt_value, pk bit); .mode insert TmpCols .output cols PRAGMA TABLE_INFO('yourtable'); .read cols .mode csv .output stdout
– Jason
Jan 5 '12 at 7:03
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Suppress command line output
... reserved names, but the basic convention was very well established.
When Windows was created, it started life as a fairly thin application switching layer on top of the MSDOS kernel, and thus had the same file name restrictions. When Windows NT was created as a true operating system in its own rig...
How do I compare two strings in Perl?
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See perldoc perlop for more information.
( I'm simplifying this a little bit as all but cmp return a value that is both an empty string, and a numerically zero value instead of 0, and a value that is both the string '1' and the numeric value 1. These are the same values you will always get from bo...
How to overcome TypeError: unhashable type: 'list'
...strip out the spaces, assigning them to the variables
# Once you get a bit more comfortable, this works as well:
# key, value = [x.strip() for x in line]
key = line[0].strip()
value = line[1].strip()
# Now we check if the dictionary contains the key; if so, append the new value,...
How to convert an Int to a String of a given length with leading zeros to align?
...ring is a Char, hence the single quotes around the 'a'.
Your problem is a bit different since you need to prepend characters instead of appending them. That's why you need to reverse the string, append the fill-up characters (you would be prepending them now since the string is reversed), and then ...