Usage:
DataFormatString = "{0: Format String }"
{0} In DataFormatString represents the data itself, while the format string after the colon represents the format they want to display the data;
Number and currency format:After the specified format symbol, you can specify the number of digits to be displayed in decimal places. For example, if the original data is "1.56" and the format is set to {0: N1 },
Output Value: 1.5 」. The common numeric format is shown in the following table:
Format String
}" 12345.6789 12,345.68"{0: N4}" 123456789 123,456,789.0000"Total: {0: c}" 12345.6789 total: $12345.68
Common Date and Time formats:
Format description output formatD. Simplified Date Format: mm/DD/YYYYD detailed Date Format: dddd, Mmmm DD, yyyyF full format (long date + short time) dddd, Mmmm DD, yyyy hh: mmFComplete Date and Time Format(Long date + long time)Dddd, Mmmm DD, yyyy hh: mm: SSG General Format (short date + short time) mm/DD/YYYY hh: mmG
}" 12345.6789 12,345.68"{0: N4}" 123456789 123,456,789.0000"Total: {0: c}" 12345.6789 total: $12345.68Common Date and Time formats:Format description output formatD. Simplified Date Format: mm/DD/YYYYD detailed Date Format: dddd, Mmmm DD, yyyyF full format (long date + short time) dddd, Mmmm DD, yyyy hh: mmFComplete Date and Time Format(Long date + long time)Dddd, Mmmm DD, yyyy hh: mm: SSG General Format (short date + short time) mm/DD/YYYY hh: mmG Ge
: mm/DD/YYYYD detailed Date Format: dddd, Mmmm DD, yyyyF full format (long date + short time) dddd, Mmmm DD, yyyy hh: mmF complete Date and Time Format (long date + long time) dddd, Mmmm DD, yyyy hh: mm: SSG General Format (short date + short time) mm/DD/YYYY hh: mmG General Format (short date + long time) mm/DD/YYYY hh: mm: SSM, M month/day format mmmm ddS moderate Date and Time Format: yyyy-mm-dd hh: mm: SST simplified time format hh: mmT detailed t
The case sensitivity of the tostring method of the date object affects the output result. As follows. Incorrect usage :? Convert. todatetime ("2005/12/22 22:22:22"). tostring ("yyyy/mm/dd hh: mm: SS ")
"Yyyy/12/DD 22: 12: SS"
? Convert. todatetime ("2005/12/22 22:22:22"). tostring ("yyyy/mm/dd hh: mm: SS ")
"2005/22/22 10:22:22" correct usage: Convert. todatetime ("22:22:22"). tostring ("yyyy/mm/dd hh: mm: SS ")
"22:22:22" common numerical formats are shown in the following table:
Format Str
. For example, if the original data is "1.56" and the format is set to {0: N1}, the output is "1.5 」. The common numeric format is shown in the following table:
Format String input result"{0: c}" 12345.6789 $12,345.68"{0: c}"-12345.6789 ($12,345.68)"{0: d}" 12345 12345"{0: D8}" 12345 00012345"{0: e}" 12345.6789 1234568e + 004"{0: E10 }" 12345.6789 1.2345678900e + 004"{0: F }" 12345.6789 12345.68"{0: F0 }" 12345.6789 12346"{0: g}" 12345.6789 12345.6789"{0: G7}" 123456789 1.234568e8"{0: n}" 12345
Reasons and solutions for the loss of network card of Linux virtual machine under Hyper-V virtualization The company has implemented virtualization, all using Microsoft Windows R2 Enterprise with Hyper-V makes the cluster run Hyper-V virtual machine. This is a good thing, save resources, centralized management, power saving, deployment ultra-fast, the key is to live migration. We use the Dell Md3000i enclosure as a clustered shared disk, which is iSCSI-based Gigabit Ethernet network storage, a
Security is critical for Linux/unix production servers and is a basic lesson for every system administrator. This article is "Plainly your Linux Server" series of the fourth, all listed below is about the basic Linux server settings, and strive to use the simplest language to explain the basic Linux server security settings, especially for the novice, if the security of the Linux server has higher requirements, It is recommended to work with a hardware firewall.First, the hardware protection of
-capturing groups (?:), such as:var c= "a001"; /A (?: \ d*)/.test (c); Console.log (regexp.$1); Empty(3): Parentheses in the grouping, you can use a qualifier on the character combination, and then can follow the number of times, such as: (a\d) {2} match a3a5(4): Select one of the multiple direct quantities in the group. For example: g (a|a) Y, but this situation is faster with g[aa]y(5): When there is a nested parenthesis in the pattern, the number of the variable is done one at a time as the
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Pierson said that multiple logon failures could also mark an attack and check for logins that use Non-existent user accounts, which usually indicates an attempt to guess the user's account information and to obtain authentication. Similarly, trying to get a successful login at work time may also indicate that this is not true for employees accessing data. Companies should investigate this.
5, the volume of database reading surges
When an attacker invades an enterprise and tries to ooze inform
The reason and solution of the problem of Linux virtual Machine network card losing under Hyper-V
The trend of virtualization
The company implemented virtualization, all using Microsoft Windows 2008 R2 Enterprise with Hyper-V to do cluster run Hyper-V virtual machines. This is a good thing, save resources, centralized management, power saving, deployment super fast, the key is to be able to migrate in real time.
We use the Dell Md3000i enclosure as a clustered shared disk, a Gigabit Ethernet
that the device in your local area network is safe and effective.
Unfortunately, Microsoft's software engineers are still not implementing it in the system, even though Microsoft has helped in writing the code for send. And some of the major network equipment suppliers, such as Cisco and Juniper Network, have implemented the support for send. It is hoped that Microsoft will be able to implement the send support in all of its operating systems in the
,cisco,juniper and so on.C: Load Balancer Service, Amazon Elastic load balancer, etc.6: Shared sessions between multiple serversA:memcacheB: Shared directory files (NFS, etc.)C: Database7: Server DeploymentDomino Failure Effect: Assume a server farm consisting of two servers, based on the average load and concurrency, each server's load is probably60% of the capacity, the failure of one of the two servers causes another to attempt to handle a 120% loa
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the environment.
4. E-commerce Web site High-performance, highly available solutions, LVS load balancing (front-end four-tier load balancer).
5. The key point explanation of the construction process, the key step explanation.
6. This program has been used in practical production applications for many times, and can be flexibly applied.
Second, the software load balance common several scenarios:
1.lvs+keepalived load Balancing, lvs+keepalived is a four-tier load balancing software under Lin
say their company does not have the necessary blockchain technical power. There are few companies with a dedicated team to ensure blockchain technology. As a result, these companies outsource the development of blockchain to professional agents and freelancers.
Job Platform Upwork and LinkedIn (LinkedIn data show that the software technology industry, since 2014-2017, the issuance of Bitcoin-related posts increased by 4.6 times times) has shown that blockchain and Bitcoin-related capabilities a
December 2007 approved par (Project Authorization Request) to develop the next generation Network 40g/100g Ethernet standards. The next-generation standard IEEE 802.3BA will be introduced in June 2010, according to the plan. 40G and 100G at present, the future of the application is mainly concentrated in the data, when the server a wide range of 10gbase-t, the speed of core exchange must be followed by a significant increase. At the same time, the technology of FCOE,ISCSI in the data center mak
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