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How to get a password from a shell script without echoing
...ad secret string
read_secret()
{
# Disable echo.
stty -echo
# Set up trap to ensure echo is enabled before exiting if the script
# is terminated while echo is disabled.
trap 'stty echo' EXIT
# Read secret.
read "$@"
# Enable echo.
stty echo
trap - EXIT
...
How to not wrap contents of a div?
...
I don't know the reasoning behind this, but I set my parent container to display:flex and the child containers to display:inline-block and they stayed inline despite the combined width of the children exceeding the parent.
Didn't need to toy with max-width, max-height...
NameError: global name 'xrange' is not defined in Python 3
...
What past.builtings.range does is simply set xrange to be a reference to range. This is helpful when creating a Python 2 / 3 polyglot codebase, but not suitable for an existing project that's designed to work on Python 2 only.
– Martijn Pieters...
Hibernate lazy-load application design
...nate can't read thoughts, therefore if you know that you need a particular set of dependencies for a particular operation, you need to express your intentions to Hibernate somehow.
From this point of view, solutions that express these intentions explicitly (namely, 2, 4 and 7) look reasonable and d...
How to create a new java.io.File in memory?
...ng a temporary file. See createTempFile for java.io.file. This file can be set to auto delete when unit test exits.
– Andrew-Dufresne
Aug 16 '14 at 0:37
2
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Base64: What is the worst possible increase in space usage?
...
Base64 encodes each set of three bytes into four bytes. In addition the output is padded to always be a multiple of four.
This means that the size of the base-64 representation of a string of size n is:
ceil(n / 3) * 4
So, for a 16kB array, ...
Django - limiting query results
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Django querysets are lazy. That means a query will hit the database only when you specifically ask for the result.
So until you print or actually use the result of a query you can filter further with no database access.
As you can see...
How to make a variadic macro (variable number of arguments)
... that I can't comment on the original post. In any case, C++ is not a superset of C. It is really silly to compile your C code with a C++ compiler. Don't do what Donny Don't does.
share
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improve th...
MySQL - Make an existing Field Unique
...sure that keeping the first of the duplicated rows is the right thing, try set session old_alter_table=1. Don't forget to set it back. mysqlolyk.wordpress.com/2012/02/18/…
– michaelliu
May 11 '13 at 6:39
...
Is < faster than
...mplemented in two machine instructions:
A test or cmp instruction, which sets EFLAGS
And a Jcc (jump) instruction, depending on the comparison type (and code layout):
jne - Jump if not equal --> ZF = 0
jz - Jump if zero (equal) --> ZF = 1
jg - Jump if greater --> ZF = 0 and SF = OF
(etc....