大约有 46,000 项符合查询结果（耗时：0.0773秒） [XML]
How do you get a Golang program to print the line number of the error it just called?
...es me to have to create a variable for it, why can't there be a log.Fatal("string", log.Flag). But creating a new variable log did work. Is it a standard thing to create log variables and stuff?
– Pinocchio
Jul 17 '14 at 19:01
...
Regex Last occurrence?
...r test needed. It changes the meaning of the the $. Standard is end of the string, with Multiline its end of the row. Because the test text in Regexr has multiple rows I need this option there.
– stema
Dec 4 '11 at 12:20
...
d3 axis labeling
... just want to replace the X-axis data by your "days" but remember to parse string values correctly and not apply concatenate.
parseTime might as well do the trick for days scaling with a date format ?
d3.json("data.json", function(error, data) {
if (error) throw error;
data.forEach(function(d) {
...
How do I change read/write mode for a file using Emacs?
...t args)
"Run a unix command and, if it returns 0, return the output as a string.
Otherwise, signal an error. The error message is the first line of the output."
(let ((output-buffer (generate-new-buffer "*stdout*")))
(unwind-protect
(let ((return-value (apply 'call-process command nil
...
Namespace + functions versus static methods on a class
...you can avoid mentioning it, if you use the keyword "using":
#include <string>
#include <vector>
// Etc.
{
using namespace std ;
// Now, everything from std is accessible without qualification
string s ; // Ok
vector v ; // Ok
}
string ss ; // COMPILATION ERROR
vector vv ;...
How to change identity column values programmatically?
...
You need to
set identity_insert YourTable ON
Then delete your row and reinsert it with different identity.
Once you have done the insert don't forget to turn identity_insert off
set identity_insert YourTable OFF
...
Throw an error in a MySQL trigger
...example on how to write the trigger in the link?I have two columns (idUser and idGuest) that must be mutually exclusive in the table orders, but i'm fairly new to triggers and i'm finding difficulties in writing it!Thx.
– Nicola Peluchetti
Mar 12 '11 at 14:44
...
Check number of arguments passed to a Bash script
...like -eq, -ne, -lt, -le, -gt, or -ge by placing the expression as a single string argument:
A=1
[[ 'A + 1' -eq 2 ]] && echo true ## Prints true.
That should be helpful if you would need to combine it with other features of [[ ]] as well.
Take note that [[ ]] and (( )) are keywords which ha...
How to UPSERT (MERGE, INSERT … ON DUPLICATE UPDATE) in PostgreSQL?
...o do an upsert, which is what MySQL calls INSERT ... ON DUPLICATE UPDATE and the standard supports as part of the MERGE operation.
...
How to handle anchor hash linking in AngularJS
Do any of you know how to nicely handle anchor hash linking in AngularJS ?
27 Answers
...