. The display is surrounded by a black border and has an ASUS logo just below the screen.
The touchpad is located almost directly below the G and H keys. The position is slightly to the left because the keyboard is joined by the full number button. Of course, there's plenty of room to put your hands on when you type.
Asus Vivobook S500ca's fuselage is 15.1 x 10.2 x 0.8 inches, while Acer Aspire v5-571p-6499 has a fuselage size of x 0.96 inches and a Dell
other competitors, meaning that multitasking may be a bit off, and the graphics are generally the same. However, its touch screen display effect is very good, support 10 touch control, operation accurate and smooth, the only problem is to show some of the screen will appear too saturated. Acer Aspire Z3-605-UR2 's wireless peripherals are good, the keyboard is soft and noiseless, the mouse size is just right, ergonomically designed.
Advantages:
· A comfortable mouse and keyboard
· Slim Desig
/");
System.out.println (Url1.equals (URL2));
System.out.println (Url1.equals (URL3));
} catch (Exception e) {
e.printstacktrace ();}}}
What is the output according to the definition? After running, this is true:
True
false
You may be right, but if I break the computer and execute it again, the result is:
False
False
But in fact, 3 domain names are the same IP address, you can ping:
Zhaoyu@inspiron ~/pr
When the Linux System Administrator takes over a new server, if there is no good handover document, the host information we can get depends on ourselves. A lot of information can be obtained directly from the host through commands. Below we will share with you five commands for obtaining Linux host information. (Note: I am using Ubuntu 13.04)
1. View or change the Linux host name command
$ hostnamemylinuxbook-Inspiron-1525
From the command results you
Now many notebooks are using dual graphics cards, built-in integrated graphics + independent graphics, so you can switch graphics cards according to different environments, such as when playing games to enable independent graphics, the Internet with the use of built-in integrated graphics to achieve energy saving purposes.
Users who use the following computer model will be affected:
The code is as follows
Copy Code
Dell Inspiron
Linux_5 command for obtaining Linux host information when the Linux system administrator takes over a new server, if there is no good handover document, the host information we can get depends on ourselves. A lot of information can be obtained directly from the host through commands. let's share it with you... linux_5 command for obtaining Linux host information when the Linux system administrator takes over a new server, if there is no good handover document, the host information we can get dep
HP 15-R221TX
HP 15-R221TX is equipped with Intel Core i5 5200U processor, the main frequency 2.2GHz, the most Gao 2.7GHz, with 4GB memory and Nvidia GeForce 820M Independent graphics card, easy to play mainstream AV entertainment.
The more The Dell Inspiron 15 5000
The Dell Inspiron 15 5000 is equipped with the Intel Core i5 5200U processor, the main frequency 2.2GHz, the most Gao 2.7GHz, Web pa
14. In addition, the screen's black level, shadow detail, and maximum brightness (310 lux) are maintained at a good level. With the help of these parameters and matte coating, the E5 can be used normally even under the sun.
However, this screen has a bit of a difference in color accuracy, and the average delta error we've measured is 9, and some colors even reach 10. As long as the error value is higher than 1, the naked eye can detect, so the E5 defect is still very obvious. In ac
next PageRank vectors by Qcur and Qnext respectively. The process is to compute the iterative powering for finding the first eigenvector.
The computation ends until for some smallε (10-10).Inputthe input contains many test cases.For each case, there is multiple lines. The first line contains an integer N (nOutputoutput one line with the eigenvector. The numbers should is separated by a space and is correctly rounded to the decimal places.Sample Input40111001100010100Sample Out
test 100W data, the cost plan is the same.*********************************************3. The function operation does not satisfy the Sarg form, causes the index to be unable to use the example: the following SQL condition statement has the proper index in the column, but the execution speed is very slow:SELECT * FROM record where substring (card_no,1,4) =′5378′ (13 seconds) select * from record where amount/30Analysis:Any action on a column in the W
time. However, if an access plan is established at compile time, the value of the variable is still unknown and therefore cannot be selected as an input for the index. The following statement will perform a full table scan:SelectId fromTwhereYou can force the query to use the index instead:SelectId fromT with (index name)where 7. Should try to avoidwhereclause, which causes the engine to discard the use of the index for full-table scanning. such as: SELECT* FROM T1 WHERE f1/2= -should read:
indexes, but the execution speed is very slow:
SELECT * FROM record where
SUBSTRING (card_no,1,4) = ' 5378 ' (13 seconds)
SELECT * FROM record where
amount/30SELECT * FROM record where
Convert (char, date,112) = ' 19991201 ' (10 seconds)
----Analysis:
The result of any operation of the column in the----WHERE clause is computed by column in SQL Runtime, so it has to
Do a table search without using the index above the column; If the results are availab
Label:The first palm avoids the action on the columnAny action on a column can result in a full table scan, where the so-called operations include database functions, calculation expressions, and so on, to move the operation to the right of the equation whenever possible, or even to remove the function.Example 1: The columns in the following SQL conditional statements are properly indexed, but the execution speed is very slow in the case of 300,000 rows of data:SELECT * FROM record where SUBSTRB
Label:Any action on a column can result in a full table scan, where the so-called operations include database functions, calculation expressions, and so on, to move the operation to the right of the equation whenever possible.Even remove the function.Example 1: The columns in the following SQL conditional statements are properly indexed, but the execution speed is very slow in the case of 300,000 rows of data:SELECT * from record where substrb (cardno,1,4) = '
)SELECT * from T1 WHERE ID >299999 and ID It is clear from the execution plan that the last method is used instead of the previous two ways of querying.That's what the internet says, but you do the test 100W data, the cost plan is the same.*********************************************3. The function operation does not satisfy the Sarg form, causes the index to be unusableExample: The columns in the following SQL conditional statements are indexed appropriately, but are very slow to execute:SELEC
, and varbinary are incompatible. Data Type incompatibility may make the optimizer unable to perform some optimization operations that can be performed originally. For example:
Select name from employee where salary>60000
In this statement, if the salary field is of the money type, it is difficult for the optimizer to optimize it because 60000 is an integer. We should convert the integer type into a coin type during programming, instead of waiting for the conversion at runtime.
3. Avoid
finds the best solution for the least cost of the system, based on the join conditions, before the multiple table operations are actually executed. The join condition takes into account the table with the index, the table with many rows, and the selection of the inner and outer tables can be determined by the formula: the number of matches in the outer table * The count of each lookup in the inner-layer table, and the product minimum is the best scheme.
----2. View the method of executing a sc
record where
SUBSTRING (card_no,1,4) = ' 5378 ' (13 seconds)
SELECT * FROM record where
amount/30SELECT * FROM record where
Convert (char, date,112) = ' 19991201 ' (10 seconds)
----Analysis:
The result of any operation of the column in the----WHERE clause is computed by column in SQL Runtime, so it has to
Do a table search without using the index above the column; If the results are available when the query is compiled,
Can be optimized by the SQL op
connection condition.
----Summary:
----1. The query optimizer lists several sets of possible connectivity scenarios and finds the best solution for the least cost of the system, based on the join conditions, before the multiple table operations are actually executed. The join condition takes into account the table with the index, the table with many rows, and the selection of the inner and outer tables can be determined by the formula: the number of matches in the outer table * The count of e
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.