大约有 15,000 项符合查询结果（耗时：0.0482秒） [XML]
How do I write a bash script to restart a process if it dies?
...ocesses that aren't their children.
There is a very good reason why in UNIX, you can ONLY wait on your children. Any method (ps parsing, pgrep, storing a PID, ...) that tries to work around that is flawed and has gaping holes in it. Just say no.
Instead you need the process that monitors your pr...
TypeError: Missing 1 required positional argument: 'self'
... instantiate a class instance here.
Use
p = Pump()
p.getPumps()
Small example -
>>> class TestClass:
def __init__(self):
print("in init")
def testFunc(self):
print("in Test Func")
>>> testInstance = TestClass()
in init
>>> te...
What is the difference between Cygwin and MinGW?
...t for Windows.
About Cygwin
The purpose of Cygwin is to make porting Unix-based applications to Windows much easier, by emulating many of the small details that Unix-based operating systems provide, and are documented by the POSIX standards. Your application can use Unix feature such as pipes, U...
Subtract 7 days from current date
...
There are edge cases where this won't work properly, for example if the daylight savings changes during the seven days in question.
– JeremyP
Apr 18 '12 at 13:08
1...
How can I shuffle the lines of a text file on the Unix command line or in a shell script?
I want to shuffle the lines of a text file randomly and create a new file. The file may have several thousands of lines.
19...
Javascript : Send JSON Object with Ajax?
...tring:JSON.stringify({name:"John", time:"2pm"}) });
Without jQuery:
var xmlhttp = new XMLHttpRequest(); // new HttpRequest instance
xmlhttp.open("POST", "/json-handler");
xmlhttp.setRequestHeader("Content-Type", "application/json");
xmlhttp.send(JSON.stringify({name:"John Rambo", time:"2pm"}))...
Check if a Postgres JSON array contains a string
...rom rabbits where (info->'food')::jsonb ? 'carrots';
You can even index the ? query on the "food" key if you switch to the jsonb type instead:
alter table rabbits alter info type jsonb using info::jsonb;
create index on rabbits using gin ((info->'food'));
select info->>'name' from rab...
generate days from date range
...bles. The subquery generates dates for the last 10,000 days, and could be extended to go as far back or forward as you wish.
select a.Date
from (
select curdate() - INTERVAL (a.a + (10 * b.a) + (100 * c.a) + (1000 * d.a) ) DAY as Date
from (select 0 as a union all select 1 union all select...
Using reflect, how do you set the value of a struct field?
...o learn about reflection is to see how the core Go developers use it. For example, the Go fmt and json packages. The package documentation has links to the source code files under the heading Package files.
The Go json package marshals and unmarshals JSON from and to Go structures.
Here's a step...
How To Remove Outline Border From Input Button
... that border in chrome
<style>
input[type="button"]
{
width:120px;
height:60px;
margin-left:35px;
display:block;
background-color:gray;
color:white;
border: none;
outline:none;
}
</style>
...