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mongorestore error: Don't know what to do with the dump file [closed]
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in mongodb 3.0 or above, we should specify the database name to restore
mongorestore -d [your_db_name] [your_dump_dir]
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What's wrong with overridable method calls in constructors?
....out.println(x);
}
}
new Child(42); // prints "0"
}
}
Here, when Base constructor calls overrideMe, Child has not finished initializing the final int x, and the method gets the wrong value. This will almost certainly lead to bugs and errors.
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Cal...
What are the differences between a pointer variable and a reference variable in C++?
...re-assigned:
int x = 5;
int y = 6;
int *p;
p = &x;
p = &y;
*p = 10;
assert(x == 5);
assert(y == 10);
A reference cannot, and must be assigned at initialization:
int x = 5;
int y = 6;
int &r = x;
A pointer has its own memory address and size on the stack (4 bytes on x86), whereas a ...
Failed to load JavaHL Library
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answered Aug 8 '12 at 20:28
Mark PhippardMark Phippard
9,91322 gold badges3030 silver badges3939 bronze badges
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How to change the href for a hyperlink using jQuery
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edited Aug 8 '18 at 0:51
lucasreta
32811 silver badge1212 bronze badges
answered Oct 7 '08 at 18:1...
How can I use “.” as the delimiter with String.split() in java [duplicate]
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203
String.split takes a regex, and '.' has a special meaning for regexes.
You (probably) want som...
Add Foreign Key to existing table
... steps:
ALTER TABLE users ADD grade_id SMALLINT UNSIGNED NOT NULL DEFAULT 0;
ALTER TABLE users ADD CONSTRAINT fk_grade_id FOREIGN KEY (grade_id) REFERENCES grades(id);
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构建高并发高可用的电商平台架构实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...面缓存（http header中包含Expires Cache of Control，last modified(304，...一、 设计理念
1. 空间换时间
1) 多级缓存，静态化
客户端页面缓存（http header中包含Expires/Cache of Control，last modified(304，server不返回body，客户端可以继续用cache，...