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Delete specific line number(s) from a text file using sed?
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On my system, when processing large files, sed appears an order of magnitude slower than a simple combination of head and tail: here's an example of the faster way (without in-place mode): delete-line() { local filename="$1"; local lineNum="$2"; head -n $((lineNum-1)) "$filename"; t...
How to iterate over a TreeMap? [duplicate]
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will this give out the values ordered?
– phil294
Sep 26 '16 at 23:51
1
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Extract every nth element of a vector
... An advantage of this approach is it can be used on a temporary; in order to use seq you have to be able to call length on the vector. letters[letters < 'm'][c(TRUE, FALSE, FALSE)]
– Matt Chambers
Sep 14 '17 at 21:07
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Check whether an array is a subset of another
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A list maintains its order but a set does not. If the order is important this would give incorrect results.
– UuDdLrLrSs
Jun 13 '18 at 20:02
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Where is my Django installation?
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Current top (accepted) answer works with my Ubuntu installation. As does yours. As do all of them!
– Adam Marshall
Apr 28 '14 at 14:24
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Are there any disadvantages to always using nvarchar(MAX)?
In SQL Server 2005, are there any disadvantages to making all character fields nvarchar(MAX) rather than specifying a length explicitly, e.g. nvarchar(255)? (Apart from the obvious one that you aren't able to limit the field length at the database level)
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jQuery Validate Plugin - Trigger validation of single field
I've got a form that can optionally be pre-populated via facebook connect. Once a user connects, their name and email are automatically filled in. The problem is that this doesn't trigger the remote validation to check if the email already exists.
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What is the fastest integer division supporting division by zero no matter what the result is?
...x, int y)
{
y += y == 0;
return x/y;
}
The compiler basically recognizes that it can use a condition flag of the test in the addition.
As per request the assembly:
.globl f
.type f, @function
f:
pushl %ebp
xorl %eax, %eax
movl %esp, %ebp
movl 12(%...
how to mysqldump remote db from local machine
... a database on a remote server, but the server does not have mysqldump installed. I would like to use the mysqldump on my machine to connect to the remote database and do the dump on my machine.
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Is there any difference between a GUID and a UUID?
...s follows. This format differs from the [UUID standard] 8 only in the byte order of the first 3 fields.
Bits Bytes Name Endianness Endianness
(GUID) RFC 4122
32 4 Data1 Native Big
16 2 Data2 Native Big
16 2 Data3 Native Big
64 8 ...