那么问题来了? int(a/b) 和 a//b 的区别在哪里呢？例1：

青岛开病假请假单-开住院证明→薇訫btw988、connectString=hadoop01:2181,hadoop02:2181,hadoop03:2181 sessionTimeout=90000 watcher=org.apache.hadoop.hbase.zookeeper.PendingWatcher@52815fa3 2019-11-26 16:53:35 647 INFO [main-SendThread(hadoop03:2181)] - Opening socket connection to server hadoop03/39.97.244.81:2181. Will not attempt to authenticate using SASL (unknown error) 2019-11-26 16:53:35 682 INFO [main-SendThread(hadoop03:2181)] - Socket connection established to hadoop03/39.97.244.81:2181, initiating session 2019-11-26 16:53:35 723 INFO [main-SendThread(hadoop03:2181)] - Session establishment complete on server hadoop03/39.97.244.81:2181, sessionid = 0x36e97710f17004c, negotiated timeout = 40000hlj@hlj-Inspiron-3568:~/hbase$ bin/start-hbase.sh localhost: running zookeeper, logging to /home/hlj/hbase/bin/…/logs/hbase-hlj-zookeeper-hlj-Inspiron-3568.out localhost: SLF4J: Failed to load class “org.slf4j.impl.StaticLoggerBinder”. localhost: SLF4J: Defaulting to no-operation (NOP) logger implementation localhost: SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details. running master, logging to /home/hlj/hbase/bin/…/logs/hbase-hlj-master-hlj-Inspiron-3568.out

hlj@hlj-Inspiron-3568:~/hbase$ bin/hbase shell HBase Shell Use “help” to get list of supported commands. Use “exit” to quit this interactive shell. For Reference, please visit: http://hbase.apache.org/2.0/book.html#shell Version 2.0.5, r76458dd074df17520ad451ded198cd832138e929, Mon Mar 18 00:41:49 UTC 2019 Took 0.0030 seconds hbase(main):001:0> create ‘student’,‘Sname’,‘Ssex’,‘Sage’,‘Sdept’,‘course’

ERROR: KeeperErrorCode = NoNode for /hbase/master

Creates a table. Pass a table name, and a set of column family specifications (at least one), and, optionally, table configuration. Column specification can be a simple string (name), or a dictionary (dictionaries are described below in main help output), necessarily including NAME attribute. Examples:

Create a table with namespace=ns1 and table qualifier=t1 hbase> create ‘ns1:t1’, {NAME => ‘f1’, VERSIONS => 5}

Create a table with namespace=default and table qualifier=t1 hbase> create ‘t1’, {NAME => ‘f1’}, {NAME => ‘f2’}, {NAME => ‘f3’} hbase> # The above in shorthand would be the following: hbase> create ‘t1’, ‘f1’, ‘f2’, ‘f3’ hbase> create ‘t1’, {NAME => ‘f1’, VERSIONS => 1, TTL => 2592000, BLOCKCACHE => true} hbase> create ‘t1’, {NAME => ‘f1’, CONFIGURATION => {‘hbase.hstore.blockingStoreFiles’ => ‘10’}} hbase> create ‘t1’, {NAME => ‘f1’, IS_MOB => true, MOB_THRESHOLD => 1000000, MOB_COMPACT_PARTITION_POLICY => ‘weekly’}

Table configuration options can be put at the end. Examples:

hbase> create ‘ns1:t1’, ‘f1’, SPLITS => [‘10’, ‘20’, ‘30’, ‘40’] hbase> create ‘t1’, ‘f1’, SPLITS => [‘10’, ‘20’, ‘30’, ‘40’] hbase> create ‘t1’, ‘f1’, SPLITS_FILE => ‘splits.txt’, OWNER => ‘johndoe’ hbase> create ‘t1’, {NAME => ‘f1’, VERSIONS => 5}, METADATA => { ‘mykey’ => ‘myvalue’ } hbase> # Optionally pre-split the table into NUMREGIONS, using hbase> # SPLITALGO (“HexStringSplit”, “UniformSplit” or classname) hbase> create ‘t1’, ‘f1’, {NUMREGIONS => 15, SPLITALGO => ‘HexStringSplit’} hbase> create ‘t1’, ‘f1’, {NUMREGIONS => 15, SPLITALGO => ‘HexStringSplit’, REGION_REPLICATION => 2, CONFIGURATION => {‘hbase.hregion.scan.loadColumnFamiliesOnDemand’ => ‘true’}} hbase> create ‘t1’, {NAME => ‘f1’, DFS_REPLICATION => 1}

You can also keep around a reference to the created table:

hbase> t1 = create ‘t1’, ‘f1’

Which gives you a reference to the table named ‘t1’, on which you can then call methods.

Took 8.2418 seconds hbase(main):002:0> 原文链接：https://blog.csdn.net/Mr_Mocha/article/details/103332018
// b 会获取值的整数部分，小数部分会丢失
a / b 会返回完整的值
举个栗子：
5 // 2 = 2
5 / 2 = 2.5
1
2
3
4
5
那么问题来了? int(a/b) 和 a//b 的区别在哪里呢？
例1：
int(7/3)=2
7//3=2
1
2
3
既然如此讨论它们意义在上面地方呢？看看例二

例二:
int(999999999999999997/5)=200000000000000000
999999999999999997//5=199999999999999999
————————————————
版权声明：本文为CSDN博主「刀刃飞雪玉花」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/daorenfeixueyuhau/article/details/92800577

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那么问题来了? int(a/b) 和 a//b 的区别在哪里呢？例1：

那么问题来了? int(a/b) 和 a//b 的区别在哪里呢？例1：相关推荐

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那么问题来了? int(a/b) 和 a//b 的区别在哪里呢？ 例1：

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那么问题来了? int(a/b) 和 a//b 的区别在哪里呢？例1：

那么问题来了? int(a/b) 和 a//b 的区别在哪里呢？例1：相关推荐