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python循环语句(二)
Python for循环可以遍历任何序列的项目,如一个列表或者一个字符串。 知识点:for循环的语法格式如下: for iterating_var in sequence: statements(s) 说明:for x in ...循环就是把每个元素代入变量x,然后执行缩进块的语句。 例如定义一个f ...
分类:编程语言   时间:2019-02-19 15:03:50    阅读次数:179
【OCP-12c】CUUG 071题库考试原题及答案解析(18)
18、(8-7) choose twoWhich two statements are true regarding views? (Choose two.) A) A simple view in which column aliases have been used cannot be upda ...
分类:其他好文   时间:2019-02-19 10:22:14    阅读次数:184
java sql SQLException Can not issue data manipulation statem
1、错误描述 java.sql.SQLException:Can not issue data manipulation statements with executeQuery() 2、错误原因 Class.forName("com.mysql.jdbc.Driver"); Connection ...
分类:数据库   时间:2019-02-13 11:05:11    阅读次数:208
Oracle/PLSQL CURSOR FOR Loop
Oracle/PLSQL: CURSOR FOR Loop The syntax for the CURSOR FOR Loop is: FOR record_index in cursor_nameLOOP {.statements.}END LOOP; You would use a CURSO ...
分类:数据库   时间:2019-01-31 14:43:35    阅读次数:194
英文结构
Statements Constructure 1. ... if ... when ... 分离结构为 [ ... ] if [ ... when ... ] ,而不是 [ ... if ... ] when [ ... ] ...
分类:其他好文   时间:2019-01-20 15:01:40    阅读次数:151
搭建Mybatis 出现 Error querying database. Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for mapper.BatchCustomer.findBatchCustomerOneToOne
Error querying database. Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for mapper.BatchCustomer.findB ...
分类:移动开发   时间:2019-01-19 14:29:08    阅读次数:254
Expressions versus statements in JavaScript
Statements and expressions An expression produces a value and can be written wherever a value is expected. Expressions that look like statements Expre ...
分类:编程语言   时间:2019-01-10 23:22:48    阅读次数:275
JS - 调试
# 使用 VS Code # 使用`debugger` > [debugger - JavaScript | MDN](https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Statements/debugger) 直接在... ...
分类:Web程序   时间:2019-01-02 01:16:28    阅读次数:210
Arraw Function
基本语法 (param1, param2, …, paramN) => { statements } (param1, param2, …, paramN) => expression 如果函数体没有用{}括起来,就等于{ return express} 只有一个参数时,括号才能不加 (single ...
分类:其他好文   时间:2018-12-30 18:53:56    阅读次数:170
OCP-1Z0-052-V8 02-99题
99. Which two statements are true regarding Oracle Data Pump? (Choose two.) A.EXPDP and IMPDP are the client components of Oracle Data Pump. B.DBMS_DA ...
分类:其他好文   时间:2018-12-19 13:08:49    阅读次数:149
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