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Get current time in seconds since the Epoch on Linux, Bash
...e used to compute elapsed times
$ printf -v beg '%(%s)T\n' -2
$ printf -v now '%(%s)T\n' -1
$ echo beg=$beg now=$now elapsed=$((now-beg))
beg=1583949610 now=1583953032 elapsed=3422
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What is the difference between the GNU Makefile variable assignments =, ?=, := and +=?
...bar"
When you use VARIABLE := value, you get the value of value as it is now. For example:
VAL = foo
VARIABLE := $(VAL)
VAL = bar
# VAL will evaluate to "bar", but VARIABLE will evaluate to "foo"
Using VARIABLE ?= val means that you only set the value of VARIABLE if VARIABLE is not set already...
How to write a Python module/package?
... tasks at work and never really bothered packaging them for others to use. Now I have been assigned to make a Python wrapper for a REST API. I have absolutely no idea on how to start and I need help.
...
What Are Some Good .NET Profilers?
...st few years, and its memory profiler has some truly useful features which now pushed it ahead of dotTrace as a package in my estimation. I'm lucky enough to have licenses for both, but if you are going to buy one .Net profiler for both performance and memory, make it ANTS.
...
Which timestamp type should I choose in a PostgreSQL database?
...TE TABLE my_tbl (
my_timestamp TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW(),
CHECK(EXTRACT(TIMEZONE FROM my_timestamp) = '0')
);
test=> SET timezone = 'America/Los_Angeles';
SET
test=> INSERT INTO my_tbl (my_timestamp) VALUES (NOW());
ERROR: new row for relation "my_tbl" violates check...
How does `is_base_of` work?
...tness anymore. In an ordinary overload resolution scenario, the call would now be ambiguous because normally the return type won't participate in overload resolution. For conversion functions, however, there is a backdoor. If two conversion functions are equally good, then the return type of them de...
How to start working with GTest and CMake
...recently been sold on using CMake for compiling my C++ projects, and would now like to start writing some unit tests for my code. I have decided to use the Google Test utility to help with this, but require some help in getting started.
...
Active Record - Find records which were created_at before today
...was referring something like MyTable1.where(MyTable[:created_at] < Time.now) is it possible?
– Sayuj
Nov 2 '11 at 10:05
...
Get hours difference between two dates in Moment Js
...te the difference in number of days between two dates using MomentJS.
var now = moment(new Date()); //todays date
var end = moment("2015-12-1"); // another date
var duration = moment.duration(now.diff(end));
var days = duration.asDays();
console.log(days)
...
Ruby / Rails - Change the timezone of a Time, without changing the value
...Suppose the target time to convert is after the D/ST transition while Time.now is before the change. Would that work ?
– Cyril Duchon-Doris
Oct 26 '16 at 18:42
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