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When should an IllegalArgumentException be thrown?
...ment as the int item and double price. The price for corresponding item is read from database table. I simply multiply the total number of item purchased with the price value and return the result. Although I am always sure at my end(Application end) that price field value in the table could never b...
How to simplify a null-safe compareTo() implementation?
...
Regarding nested "if" ... I find the nested if to be less readable for this case, so I avoid it. Yes, sometimes there will be an unnecessary comparison due to this. final for parameters is not necessary, but is a good idea.
– Eddie
Jan 26 '09...
How can I preview a merge in git?
...u want to ensure you don't mess up your current branch, or you're just not ready to merge regardless of the existence of conflicts, simply create a new sub-branch off of it and merge that:
Strategy 1: The safe way – merge off a temporary branch:
git checkout mybranch
git checkout -b mynew-temporar...
List of Timezone ID's for use with FindTimeZoneById() in C#?
... @Sebastian- just to avoid confusion, I think your first sentence should read, "No, the output of the program is NOT sensitive to daylight savings time." Regardless of what time of the year you run the program, the list will be the same, which is what JohnOpincar was asking.
–...
Why is exception handling bad?
...ments to make sure that data structures are not corrupted and that other threads can't see your intermediate values. If any one of those statements just randomly doesn't run, you end up in a world of pain. Now take away locks and concurrency, and think about each method like that. Think of each m...
Why do we use __init__ in Python classes?
...ntegers. There's a lot of them, a lot more than dogs. I know that Python already has integers, but let's play dumb and "implement" them again (by cheating and using Python's integers).
So, Integers are a class. They have some data (value), and some behaviours ("add me to this other number"). Let's ...
社交应用组件 · App Inventor 2 中文网
... 需要请求的权限名称如下：
权限名：android.permission.READ_SMS。
方法
发送消息()
启动手机的默认短信应用程序，并预先填充消息和电话号码。
直接发送消息()
发送一个文本消息。
使用此块将...
Good or bad practice? Initializing objects in getter
... null;
Assert.Null(foo.Bar); // This will fail
It introduces quite some threading issues: Two callers of foo.Bar on different threads can potentially get two different instances of Bar and one of them will be without a connection to the Foo instance. Any changes made to that Bar instance are silent...
Is either GET or POST more secure than the other?
...y, un-encrypted traffic can be logged in its entirety; a malicious proxy already has everything it needs. Secondly, the request parameters are of limited use to an attacker: what they really need is the cookies, so if the only thing they have are proxy logs, they are unlikely to be able to attack ei...
Differences between socket.io and websockets
...k and you are capable of working around those limitations.
This is a good read on both WebSockets and Socket.IO.
http://davidwalsh.name/websocket
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