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How do I check if a file exists in Java?
The only similar question on SO deals with writing the file and was thus answered using FileWriter which is obviously not applicable here.
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程序员之网络安全系列（三）：数据加密之对称加密算法 - 更多技术 - 清泛网...
...行编码和解码的一种算法。
举个例子：
假设我们要对LOVE加密，我们可以先定义字母的顺序ABCDEFGHIJKLMNOPQRSTUVWXYZ，然后我们让每个字母向后移动两位，那么LOVE就变为了NQXG
L------>N
O------>Q
V------>X
E------>
LOVE--->NQXG
我想这就...
Cancel split window in Vim
I have split my windows horizontally. Now how can I return to normal mode, i.e. no split window just one window without cancelling all of my open windows. I have 5 and do not want to "quit", just want to get out of split window.
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Eclipse add Tomcat 7 blank server name
I was trying to add Tomcat 7 in my Eclipse in Ubuntu. When I click "Add new server" in Eclipse and select "Tomcat v7.0 Server", the field "Server Name" is blank and I cannot type in anything in that textbox as shown below:
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How do I enable standard copy paste for a TextView in Android?
I want to enable standard copy paste for a TextView (the same as for EditText). How can I do it?
9 Answers
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How to call a function from a string stored in a variable?
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How could I void function definition error if the the function was not defined? Does if($functionName) enough?
– SaidbakR
May 2 '13 at 9:27
14...
Best way to represent a fraction in Java?
... a BigFraction from a floating-point number.
*
* Warning: round-off error in IEEE floating point numbers can result
* in answers that are unexpected. For example,
* System.out.println(new BigFraction(1.1))
* will print:
* 2476979795053773/2251799813685248
*
* This...
How to make an AJAX call without jQuery?
... else if (xmlhttp.status == 400) {
alert('There was an error 400');
}
else {
alert('something else other than 200 was returned');
}
}
};
xmlhttp.open("GET", "ajax_info.txt", true);
xmlhttp.send();
}
</script&...
Connection to SQL Server Works Sometimes
...ed IPv4). Some later attempts to connect through SSMS resulted in the same error message.
To enable TCP/IP for additional IP addresses:
Start Sql Server Configuration Manager
Open the node SQL Server Network Configuration
Left-click Protocols for MYSQLINSTANCE
In the right-hand pane, right-click ...
Get integer value from string in swift
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