Fitbit upcoming IPO, this is a smart wearable company, the main products for health testing equipment, smart bracelet, smart watch. Let's take a look at some of Fitbit's data. According to its prospectus, Fitbit sold 10.9 million wearable devices in 2014, more than twice times in 2013. As of the first quarter of 2015, Fitbit sold 20.8 million devices from its inc
Editor's note: This article from Tomasz Tunguz, the Chinese version by Heaven Zhuhai Branch Rudder compiled.
If you are concerned about these days of overseas industry news, you should be not unfamiliar with the news that Fitbit is listed on the Nasdaq and become another "unicorn"-level start-up company. We have previously written about how the GoPro's income growth rate is unbelievable. And now it seems that
Objective: To import the Fitbit daily Movement records into the R language for analysis and to draw a statistical chart toOriginal data: fitbit2014 Daily Record spreadsheet file, examples are as follows:
Date
Calories burned
Step
Distance
Number of floors climbed
A sedentary number of minutes
Less active minutes
Moderate active minutes
Very active minutes
which
Find a file in an environment variable
-A finds all content, not the first file
-n
-p
-W Specifies the width of the field when output.
-V Displays version information.
Cases:
The code is as follows:
[Zhangy@blackghost download]$ which find
/usr/bin/find
Whereis
Syntax of the Whereis command: Whereis [-BMSU] [BMS directory name-f] File name
The options for the Whereis command have the following meanings:
-B locates the executable file.
-M
Linux uses the locate command to locate a file
From: http://linux-blog.org/finding-files-with-locate/
FIND command
Many Linux users like to use the find command to find files. For example, they usually like this:
Find/-name 'pattern'
Indeed, the powerful function of find is not only used to find files, but also to locate
Find commandMany Linux users like to use the Find command to find files, for example they usually like to do this:Find/-name ' pattern 'The powerful feature of find is not only used to find files, it can be used to locate more detailed things, such as you want to find in a directory to give its owners and administrators can write permissions (if you wanted to find files which is writable by both T Heir owner and their group), you can do this:Find/-per
Full-text excerpt translated from: http://linux-blog.org/finding-files-with-locate/Find commandMany Linux users prefer to find files using the Find command, For example they usually like to do this:Find/-name ' pattern 'The powerful feature of find is not only used to find files, it can be used to locate more detailed things, such as you want to find in a directory to give its owners and administrators can
First, the method of locating elements
ID: Preferred recognition attribute, the standard recommended for each element of the page set a unique id attribute,
If it is not and it is difficult to find the unique attribute, workaround: (1) Find the development to add the ID or name. If not, the solution can be:1. Find the feature of the button, such as the text of the button is submit;2. Using XPath to locate, you can write://button[@value =
Locate can position the current cursor on a qualified record. The first parameter of locate is the condition field, and the second parameter is the condition.Value. The third parameter indicates whether the search is case-sensitive and partially matched. You can set multiple conditions for locate as follows:Table1.locate
Use gdb to quickly locate the "segment error" and gdb to locate the segment Error
Sometimes, when we operate on an invalid memory in a section of C/C ++ code, the "Segmentation fault (core dumped) "-- segment error.
I think many people will often encounter this problem. This problem is very speechless, just prompts "segment error", and then there is nothing. If we blindly look at the code to find it too p
Locate and z-index, locate z-index
Positioning
Location used to control the element
The positioning keyword is position and position has four values: relative, absolute, static, and fixed. After the element is located, the element has four values available: left, right, top, bottom.
I will use the following examples to demonstrate the absolute location of absolute and relative location of relative.
1. I def
Locate allows users to quickly search the file system for specific files. The approach is to create a database that includes all the file names and paths in the system, and then simply query the database when looking, without actually going into the file system. In the general distribution, the establishment of the database is put into the crontab to execute automatically.
1. Command format:
Locate [Selec
Locate allows users to quickly search the file system for specific files. The method is to set up a database that includes all the file names and paths within the system, and then simply query the database when looking for it, rather than actually going deep into the file system. In the general distribution, the establishment of the database is placed in the crontab automatic execution.1. Command format :Locate
Locate, the meaning of positioning, is to allow users to quickly search the system for the specified file.Locate Command features:1"locate"的速度比"find"快,因为它并不是真的查找文件,而是查数据库。2) 新建的文件,我们立即用"locate"命令去查找,一般是找不到的, 因为数据库的更新不是实时的,数据库的更新时间由系统维护。3"locate"命令所搜索的后台数据库在"/var/lib/mlocate"这个目录下, 可能有些Linux系统位置不同,具体我们可以用"
locate allows users to quickly search the file system for specific files. The method is to set up a database that includes all the file names and paths within the system, and then simply query the database when looking for it, rather than actually going deep into the file system. In the general distribution, the database is set up in CRontab automatic execution. 1. command format:Locate [select parameter] [style]2. command function:The
Locate allows users to quickly search the file system for specific files . The method is to set up a database that includes all the file names and paths within the system, and then simply query the database when looking for it, rather than actually going deep into the file system. In the general distribution, the establishment of the database is placed in the crontab automatic execution.1. Command format:Locate [Select parameters] [style]2. Command fu
Locate allows users to quickly search the file system for specific files. The method is to set up a database that includes all the file names and paths within the system, and then simply query the database when looking for it, rather than actually going deep into the file system. In the general distribution, the establishment of the database is placed in the crontab automatic execution.1. Command format:Locate [Select parameters] [style]2. Command fun
locate allows users to quickly search the file system for specific files. The method is to set up a database that includes all the file names and paths within the system, and then simply query the database when looking for it, rather than actually going deep into the file system. In the general distribution, the database is set up in CRontab automatic execution. 1. command format:Locate[Select parameters] [Style]2. Command function:The
Mysql will use the same language method:SELECT ' column ' from ' table ' where ' condition ' like '%keyword% 'In fact, you can use both the locate and InStr functions insteadSELECT ' column ' from ' table ' where locate(' keyword ', ' condition ') >0or locate's name position.SELECT ' column ' from ' table ' where position(' keyword ' in ' condition ')OrSELECT ' column ' from ' table ' where instr(' conditi
1. Command format:Locate [Select parameters] [style]2. Command function:The locate command can quickly find the file when searching the database, the database is updated by the UpdateDB program, UpdateDB is created periodically by Cron Daemon, and the locate command searches the database faster than the entire data from the hard disk. But the worse is locate foun
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