The No. 0004 question of Python exercisesHttps://github.com/Show-Me-the-Code/show-me-the-codeQuestion No. 0004: Any plain text file in English, counting the number of occurrences of the word.Talk was cheap, show you My Code.#!/usr/bin/env python#!-*-coding:utf-8-*- fromCollectionsImportordereddict__author__ =' Sophie ' class appearancecounter(object): def __init__(self):Self.dict = {} def add_count(self
NSString, is risky)
5.strong and Weakis a new object variable attribute introduced by ARC, ARC introduces a new object for the new life-cycle qualification simple speaking strong equals retain
Weak more than assign a function, when the object disappears automatically turn the pointer to nil, the benefits are self-evident
6.atomic (default) and NonatomicAtomic:atomic means that the operation is atomic, meaning that only one thread accesses the instance variable. The atomic is thread-safe,
According to the traditional way of operation, usually click on a button or a menu item, we will page by the way of specifying a URL to jump,In HTML, the use of the traditional a-tag href attribute as a jump, in the case of using ui-router, we have a buttonAdd the Ui-sref property, which is the route state for the button. Note that the routing URLs described here are related to the state. Just beforeThose properties that are configured in state.The use of Ui-router is much more detailed, but thi
;./configure--with-ssl> sudo make installThere will be a lot of options when you/configure. Among the more commonly used are:--ENABLE-SMP-SUPPORT-SMP Support (enabled by default if a usable POSIX thread library or native Windows threads is found )--enable-kernel-poll-kernel poll Support (enabled by default if possible)--enable-hipe-hipe Support (enabled by default on supported PLATFNote that if you encounter the following error:{error,{load_failed,"Failed to load NIF library: '/usr/local/lib/erl
DOCTYPE HTML>HTMLLang= "en">page language, which search engines can use to filter results, specify the lang attribute for different areas of text, and screen readers can read the appropriate text -Head> Web keywords, search engine optimization, content users are not visible - Metaname= "keyword"content= "Marathon, long-distance running, exercise"> Web page description, page descriptions, in search engine meet visible. - Metaname= "description"content= "This is a site dedicated to ex
question No. 0004: any plain text file in English, counting the number of occurrences of the word.---------------------------------------------------------------------------#Source:https://github.com/show-me-the-code/show-me-the-code#Author:renzongxian#date:2014-12-07#Python 3.4"""question No. 0004: Any plain text file in English, counting the number of occurrences of the word. """ImportSYSdefWord_count (fi
question No. 0004: any plain text file in English, counting the number of occurrences of the word.Idea: match the words and numbers of the response with regular expressions, then let counter calculate the word frequency of the words, and then use the Most_common method to return a list of tuples that contain the word and the number of occurrences of that word in chronological order.0004. Statistical words.
Hadoop Study Notes 0004 -- Eclipse installation Hadoop Plugins1 , download hadoop-1.2.1.tar.gz , unzip to Win7 under hadoop-1.2.1 ;2 , if hadoop-1.2.1 not in Hadoop-eclipse-plugin-1.2.1.jar package, on the internet to download down; 3 , close Eclipse, Copy to eclipse installation directory eclipse-x.x\plugins eclipse 4 , in Eclipse Middle top menu bar window->preferences set the following path5 , open map/reducelocations window6
When we test the data source with Cognos, many users encounter errors that cannot be loaded by the database driver. For example, if we're using DB2, that means we can't load com.ibm.db2.jcc.DB2Driver.The solution is simple:1. Place the driver file:Db2jcc4.jarAndDb2jcc_license_cu.jarCopy toAnd2. Then remember to restart the Cognos service to resolve this issue.Solution for Cognos test data source xqe-jdb-0004 error
set config=config.py, do not owe config.py quotes, and the view function must remember to return a response object, because none cannot generate a response object, So make sure you're not returning none.Common ways:
#!/usr/bin/env python#-*-coding:utf-8-*-"" "# # authors:limanman# 51ctobg:http://xmdevops.blog.51cto.com/# Purpose:# "" "from __future__ Import absolute_import# Description: Import Public Module # Description: Import other Modules # Description: Configure the base class classe
less than 10 lines continue to 1000 reads, and so forth ~Specific implementation:#!/usr/bin/envpython#-*-coding:utf-8-*-"" "##authors:limanman# 51ctobg:http://xmdevops.blog.51cto.com/#purpose:# "" "From__future__importabsolute _import# Description: Import Public module importosimportsysimporttimeimportchardet# Description: Import other modules #if__name__== ' __main__ ':seekps=0; target= ' Data.txt ';try: # the pointer jumps to the end as the read position withopen ( target, ' r+b ') asf: F.se
Board object on the line, the Checkerboard object saved both sides of the game, simple backtracking, minus one can be, and the display and decision is not involved, while the overall function of the various objects are not changed in order, the change is limited to the local.deep thinking of 3.5.3 Oo Oo thinks: A software system is a set of objects that interact.Because human beings are very familiar with the real world, OO is to map the problem domain to the real world and try to simulate ever
Question: In ubuntu14.10 the latest version of opera can not install Flash, the online tutorial Usr/lib can't find the opera directory!Workaround:The first to install opera, directly open Opera official website, the official website will automatically check your system for Linux, directly installed.Because Adobe Flash no longer supports LinuxGoogle has developed Pepperflashplayer to replace the original Adobe FlashThe following describes the Pepperflashplayer in the installation methodFirst step
Since the final deployment of the production environment is centos, I need to install Erlang b13r04 in centos. The first time I did this, I had to take a long time off, but I was not familiar with the libraries that Erlang relied on; here we will
Today's operating systems, whether Windows or Linux have RAID capabilities, RAID is divided into hardware RAID and software RAID, hardware RAID is through the RAID card, software RAID is implemented by software, Today's commonly used raid is: RAID0: At least two hard drives; RAID1: At least two hard drives; RAID5: At least three pieces of hard drive; RAID6: At least four pieces of hard drive; 1, Virtual machine environment preparation Virtual machine environment, add 4 blocks of 1GB IDE disk
Partition Table
This error is reported because the virtual machine is used. It is unclear, but you can use partx to reread it.
Input: partx-a/dev/sdb
These errors do not have much impact. You only need to check whether the device has read them.
Input: cat/proc/partitions
As shown in the following figure, the created sdb7 and sdb8 have also created a 2G sdb9 instance for subsequent damage simulation.
Now use mdadm to create RAID1
Input: mdadm-C/dev/md1
: Create Raid1[Root @ localhost ~] # Mdadm-C-v/dev/md1-l 1-n 2-x 1/dev/sdc1/dev/sdc2/dev/sdc3# Create an array named "md1" with three hard disks at level 1:/dev/sdc1 2 and 3.Mdadm: size set to 1059222 KContinue creating array? Y # select YMdadm: Defaulting to version 1.2 metadataMdadm: array/dev/md1 started.[Root @ localhost ~] # Ll/dev/
device file is automatically created for it,-n indicates the number of devices, and-L indicates the level of RAID set#cat/proc/mdstatExplanation: View all enabled devices for the current system#mke2fs-j/dev/md0Explanation: Advanced formatting, creating md0 as a ext3 type file system#mount/dev/md0/mntExplanation: Mount the RAID0 to the/MNT directory and you can start using the device.#cd/mntExplanation: Enter into the/mnt directory, if you see the Lost+found file, the instructions mount successf
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