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What does set -e mean in a bash script?
...not the outer script).
For example, suppose I have the shell script outer-test.sh:
#!/bin/sh
set -e
./inner-test.sh
exit 62;
The code for inner-test.sh is:
#!/bin/sh
exit 26;
When I run outer-script.sh from the command line, my outer script terminates with the exit code of the inner script:
...
What's the difference between emulation and simulation? [duplicate]
...uld produce.
Let me give an example -- suppose you want to do some system testing to see how adding a new sensor (like a thermometer) to a system would affect the system. You know that the thermometer sends a message 8 time a second containing its measurement.
Simulation -- if you do not have the ...
Does using “new” on a struct allocate it on the heap or stack?
...re slightly different again. To show all these differences, here's a short test program. It doesn't show the difference between static variables and instance variables: the IL would differ between stfld and stsfld, but that's all.
using System;
public class Test
{
static Guid field;
stati...
What's a quick way to test to see a file exists?
...he directory's files, or I can try to open a specific file. What's the fastest way? I just need to know if the file is there or if it does not exist.
...
了解 Boost Filesystem Library - C/C++ - 清泛网 - 专注C/C++及内核技术
...) 的形式返回给定文件名的扩展名。例如，对于文件名为 test.cpp 的文件，extension 将返回 .cpp。对于文件没有扩展名的情况，此函数将返回空字符串。对于隐藏文件（即 UNIX 系统中文件名以 . 开始的文件），此函数将相应地计算扩...
How do I run a Python script from C#?
...g if i pass c:\python26\python.exe as cmd and then c:\temp\code.py c:\temp\testfile.txt as args it should work?
– Inbar Rose
Aug 2 '12 at 14:12
...
How to process SIGTERM signal gracefully?
...n, similar to if you were to Ctrl+C your program.
Example program signals-test.py:
#!/usr/bin/python
from time import sleep
import signal
import sys
def sigterm_handler(_signo, _stack_frame):
# Raises SystemExit(0):
sys.exit(0)
if sys.argv[1] == "handle_signal":
signal.signal(signa...
How do you use script variables in psql?
...ontrary to Bryce's report, it seems to work fine for me. CREATE TABLE test (name VARCHAR, age INT); INSERT INTO test (name, age) VALUES ('Jack', 21), ('Jill', 20); WITH vars AS (SELECT N'Jack' AS name, 21 AS age) SELECT test.* FROM test, vars WHERE test.name = vars.name and te...
Does PowerShell support constants?
...
Use
Set-Variable test -option Constant -value 100
or
Set-Variable test -option ReadOnly -value 100
The difference between "Constant" and "ReadOnly" is that a read-only variable can be removed (and then re-created) via
Remove-Variable te...
How to explain dependency injection to a 5-year-old? [closed]
...ing this way becomes problematic especially when you want to perform unit testing.
The main problem comes when you need to test one particular object, you need to create an instance of other object, and most likely you need to create an instance of yet other object to do that. The chain may become...