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How to pass in password to pg_dump?
...ting systems allow non-root users to see process environment variables via ps; instead consider using the ~/.pgpass file
– bouchon
Nov 23 '15 at 8:35
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socket.error: [Errno 48] Address already in use
...rocess still bound to the port. Try and locate the other process first:
$ ps -fA | grep python
501 81651 12648 0 9:53PM ttys000 0:00.16 python -m SimpleHTTPServer
The command arguments are included, so you can spot the one running SimpleHTTPServer if more than one python process is active...
How to fix Error: laravel.log could not be opened?
...your web server user and group use the following commands. for nginx use:
ps aux|grep nginx|grep -v grep
for apache use:
ps aux | egrep '(apache|httpd)'
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How to round an average to 2 decimal places in PostgreSQL?
...r, @Catcall and the PostgreSQL team agree about "pg's historic rationale".
PS: another point about rounding is accuracy, check @IanKenney's answer.
Overloading as casting strategy
You can overload the ROUND function with,
CREATE FUNCTION ROUND(float,int) RETURNS NUMERIC AS $$
SELECT ROUND($1::...
Export query result to .csv file in SQL Server 2008
...ons. For example all the NULLs show in output files as "NULL", etc. Perhaps there is a way to set this that I don't know about, however.
– Noah
Sep 6 '13 at 7:36
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北漂90后张鸿润：创业不做于佳文 坚持就好 - 资讯 - 清泛网 - 专注C/C++及内核技术
...创业不做于佳文 坚持就好总归要有那么一些人去呵护住最后那点理想的火星，用实际行动坚持初心，引导新的创业方向。
8月30日，作为90后典型创业者余佳文、马佳佳被联想董事长兼主席杨元庆炮轰，指责他“忽悠吹牛，虚报...
Is it possible to start a shell session in a running container (without ssh)
...lxc-attach -n <ID>
Note that the id needs to be the full one (docker ps -notrunc).
However, I strongly recommend against this.
notice: -notrunc is deprecated, it will be replaced by --no-trunc soon.
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Peak detection in a 2D array
...lue, filter overlapping squares
def drop_overlapping(pairs):
no_overlaps = []
def does_not_overlap(p1, p2):
i1, i2 = p1[0], p2[0]
r1, col1 = i1 / (width-1), i1 % (width-1)
r2, col2 = i2 / (width-1), i2 % (width-1)
return (max(abs(r1-r2),abs(col1-col2)) >= ...
How do I get the difference between two Dates in JavaScript?
...e JsFiddle DEMO
var date1 = new Date();
var date2 = new Date("2025/07/30 21:59:00");
//Customise date2 for your required future time
showDiff();
function showDiff(date1, date2){
var diff = (date2 - date1)/1000;
diff = Math.abs(Math.floor(diff));
var days = Math.f...
How can I escape a double quote inside double quotes?
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+1 because it solved a problem of adding a PS1 variable to ~/.profile echo 'export PS1='\[\033[00;31m\]${?##0}$([ $? -ne 0 ] && echo \x22 \x22)\[\033[00;32m\]\u\[\033[00m\]@\[\033[00;36m\]\h\[\033[00m\][\[\033[01;33m\]\d \t\[\033[00m\]] \[\033[01;34m\]\w\n\[...