<script type="text/javascript"> var flashvars = { file: ’foo’, autostart: ’true’ };
</script>
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引发未捕获的SyntaxError:使用最新的Google Chrome浏览器意外的令牌ILLEGAL.
我正在使用Statement的executeUpdate和executeQuery.我在SQL查询中连接的字符串值至少可以包含'\字符和Unicode.
PreparedStatement似乎是自动执行此操作,但JDBC库中是否有一些实用程序函数可以转义任意字符串以用于SQL查询?
我遇到的示例错误:
org.postgresql.util.PSQLException: ERROR: unterminated quoted string at or near
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和
org.postgresql.util.PSQLException: ERROR: invalid Unicode escape
Hint: Unicode escapes must be \uXXXX or \UXXXXXXXX.
Run Code Online (Sandbox Code Playgroud) 我们如何实现“就地”转换为哈希值的浮点数?动机是不必写这样的代码
r['delivery_fee'] = r['delivery_fee'].to_f
r['delivery_free_over'] = r['delivery_free_over'].to_f
r['delivery_possible_over'] = r['delivery_possible_over'].to_f
r['delivery_range'] = r['delivery_range'].to_f
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反而
to_f r['delivery_fee']
to_f r['delivery_free_over']
# ...
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我这样做了,但是它没有按预期的方式工作。
def to_f(s)
s = s.to_f
end
data = "1"
p data # => "1"
to_f data
p data # => Still "1" and not float
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