大约有 1,900 项符合查询结果（耗时：0.0080秒） [XML]
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::...
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...
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
14
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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.
share
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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 can I escape a double quote inside double quotes?
...
+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\[...
Possible to change where Android Virtual Devices are saved?
I've set up the Android SDK and Eclipse on my machine running Windows XP and AVDs (Android Virtual Devices) are saved to "Documents and Settings\ user \.android" by default. Is there any way to change this behavior? I have all of the other components saved in a directory on a separate partition an...
How to increase font size in a plot in R?
...
Thanks! What is the difference with "ps=1.5"?
– Tim
Nov 22 '10 at 2:44
5
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Format date and time in a Windows batch script
...e if your batch script is being used in a known environment where you know PS is available (or check in your batch file if PowerShell is available...)
You may reasonably ask: why use a batch file at all if you can use PowerShell to get the date/time, but I think some obvious reasons are: (a) you'r...
Replace one substring for another string in shell script
... the accepted one with the global replacement option? And adding that regexps are supported, while at it. And explaining what's up with "Bad substitution". You have enough points, @Kevin :)
– Dan Dascalescu
Oct 15 '17 at 21:10
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