大约有 20,000 项符合查询结果（耗时：0.0414秒） [XML]
how can I Update top 100 records in sql server
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Any idea how to use the order by as well?
– Joe Phillips
Feb 27 '13 at 18:30
8
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Delete text in between HTML tags in vim?
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And the Surround plugin (vim.org/scripts/script.php?script_id=1697) is awesome when you want to do things like change the surrounding tag (cst) from a <p> to a <div>, for example.
– Kris Jenkins
Nov 21 '10 at 12:45
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How to order citations by appearance using BibTeX?
By default (using the plain style) BibTeX orders citations alphabetically.
12 Answers
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Is short-circuiting logical operators mandated? And evaluation order?
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Yes, short-circuiting and evaluation order are required for operators || and && in both C and C++ standards.
C++ standard says (there should be an equivalent clause in the C standard):
1.9.18
In the evaluation of the following expressions
a &a...
Get top n records for each group of grouped results
...ueries for each group:
(
select *
from mytable
where `group` = 1
order by age desc
LIMIT 2
)
UNION ALL
(
select *
from mytable
where `group` = 2
order by age desc
LIMIT 2
)
There are a variety of ways to do this, see this article to determine the best route for your situatio...
Filter rows which contain a certain string
...y extend to more than one column.
Below also a solution with filter_all in order to find the string in any column,
using diamonds as example, looking for the string "V"
library(tidyverse)
String in only one column
# for only one column... extendable to more than one creating a column list in `acros...
Understand the “Decorator Pattern” with a real world example
...and final bill-amount will be composed of the base pizzas and additionally ordered toppings. Each topping decorator would know about the pizzas that it is decorating and it's price. GetPrice() method of Topping object would return cumulative price of both pizza and the topping.
EDIT
Here's a code-...
How to find encoding of a file via script on Linux?
...ow. If you have 8 bit characters then the upper region characters exist in order encodings as well. Therefor you would have to use a dictionary to get a better guess which word it is and determine from there which letter it must be. Finally if you detect that it might be utf-8 than you are sure it i...
Why do people write the #!/usr/bin/env python shebang on the first line of a Python script?
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In order to run the python script, we need to tell the shell three things:
That the file is a script
Which interpreter we want to execute the script
The path of said interpreter
The shebang #! accomplishes (1.). The shebang ...
Sorting a Python list by two fields
...ove, this is the best (only?) way to do multiple sorts with different sort orders. Perhaps highlight that. Also, your text does not indicate that you sorted descending on second element.
– PeterVermont
Jun 12 '15 at 14:25
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