Tag：for
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Time：2020-8-30
For command: Various usages of for I in: for i in “file1” “file2” “file3” for i in /boot/* for i in /etc/*.conf For I in $(SEQ – W 10) for i in {1…10} for i in $( ls ) for I in $(< file) For I in “[email protected]” – “takes all positional parameters, which can […]
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Time：2020-8-19
Solution: do not use for to calculate the IOU between two groups and multiple rectangles Using numpy broadcast method, it is not recommended to use for statement in Python program. The for statement in Python takes a lot of time. If you use numpy broadcast, the idea will speed up a lot. code: def calc_iou(bbox1, […]
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Time：2020-5-10
Due to security issues, apple blocked Adobe Flash player on Mac OS, resulting in some flash based content can not be displayed. In the game of Baidu experience mall lottery, there is a display problem. Finally, it is solved by installing flash player. Here is a brief introduction Software name: Adobe Flash player uninstaller for […]
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Time：2020-3-19
In this paper, we share three kinds of Oracle cycles (for, while, loop) for your reference. The details are as follows 1. For loop usage in Oracle (multiplication table) declare i int:=0; j int:=0; begin for i in 1..9 loop for j in 1..i loop Dbms_Output.put(i||’*’||j||’=’||i*j); dbms_output.put(‘ ‘); end loop; dbms_output.new_line; end loop; end; 2. […]
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Time：2020-2-5
For help documentation Executes a specific command for each file in a set of files. FOR %variable IN (set) DO command [command-parameters] %Variable specifies a single letter replaceable parameter.(set) specifies a file or group of files. You can use wildcards.Command specifies the command to execute for each file.command-parameters Specify parameters or command line switches for […]
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Time：2020-1-15
Preface In the shell scripts we use in daily life, we often involve the case of integer auto increment in the while or for loop. In fact, there are many ways to realize auto increment. Here are the possible ways to share them for your reference and study. Let’s see the detailed introduction together [method […]
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Time：2020-1-10
Preface For loops are used to traverse arrays or numbers. There are two ways to traverse a string with a for loop: byte and run. The first way is byte and the second way is run. I won’t talk about it in detail. Let’s take a look at the details. Golang implements for loop package […]
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Time：2020-1-9
Preface Golang (Chinese Name: go language) is the second open source programming language released by Google in 2009. Go language is specially optimized for the application programming of multiprocessor system. The program compiled by go can be as fast as C or C + + code, and it is more secure and supports parallel process.. […]
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Time：2019-12-20
Microsoft has added the split screen function in Windows 8, which can make two applications share the screen in different proportion at the same time. At present, in the latest Mac OS 10.11, we have also added the split screen function, which can make us more reasonable and effective arrangement of application windows and improve […]
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Time：2019-12-3
In MAC 10.10 system, what should I do if netkeeper can’t be connected to the Internet? Using the school’s network to connect to netkeeper will always report an error. Although some netkeeper can also report an error, but I can’t get online. What should I do? Let’s look at the solution. 1. First click the […]
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Time：2019-10-24
Microsoft has just announced a public preview of the next generation of SQL Server, and Canonical has officially announced that this preview version is available for Ubuntu. Whether deployed in-house or in the cloud, SQL Server on Ubuntu offers developers and organizations more freedom of choice. The development languages and data types allowed by SQL […]
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Time：2019-10-17
When MySQL performs DDL operations such as alter table, sometimes there is a waiting for table metadata lock scenario. In addition, once the operation of alter table tableA stops in the state of waiting for table metadata lock, any subsequent operation (including reading) of tableA cannot be performed, because they will also enter the waiting […]
