大约有 42,000 项符合查询结果（耗时：0.0370秒） [XML]
Using a dictionary to count the items in a list [duplicate]
I'm new to Python and I have a simple question, say I have a list of items:
8 Answers
...
MySQL dump by query
...inal post asked if he could dump from the database by query. What he asked and what he meant were different. He really wanted to just mysqldump all tables.
mysqldump --tables myTable --where="id < 1000"
share
|...
Create an array with random values
How can I create an array with 40 elements, with random values from 0 to 39 ?
Like
21 Answers
...
Version of SQLite used in Android?
What is the version of SQLite used in Android?
5 Answers
5
...
List files with certain extensions with ls and grep
I just want to get the files from the current dir and only output .mp4 .mp3 .exe files nothing else.
So I thought I could just do this:
...
how to get the last character of a string?
...
An elegant and short alternative, is the String.prototype.slice method.
Just by:
str.slice(-1);
A negative start index slices the string from length+index, to length, being index -1, the last character is extracted:
"abc".slice(-1)...
How to change legend title in ggplot
I have the following plot like below.
It was created with this command:
12 Answers
12...
How can I check if a View exists in a Database?
...
If you found this to decide between a CREATE and ALTER for a view (as I did), this doesn't work for VIEWs - you have to DROP the VIEW* and then CREATE it. The IF EXISTS still works fine for DROPing the VIEW tho, so thanks! :) * Don't forget about any permissions when y...
C# 'is' operator performance
... answered Mar 26 '09 at 16:09
Andrew HareAndrew Hare
310k6363 gold badges611611 silver badges614614 bronze badges
...
Efficiently convert rows to columns in sql server
...onvert rows to columns in SQL server, I heard that PIVOT is not very fast, and I need to deal with lot of records.
2 Answer...