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How do you effectively model inheritance in a database?
...nd up with this table:
table Person
------------
int id (PK)
int rowtype (0 = "Person", 1 = "Employee")
string firstname
string lastname
datetime startdate
For any rows which are rowtype 0 (Person), the startdate will always be null.
Table-Per-Concrete (TPC)
Each class has its own fully formed ...
How to capitalize first letter of each word, like a 2-word city? [duplicate]
...
return str.replace(/\w\S*/g, function(txt){
return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
});
}
or in ES6:
var text = "foo bar loo zoo moo";
text = text.toLowerCase()
.split(' ')
.map((s) => s.charAt(0).toUpperCase() + s.substring(1))
.join(' ')...
Total number of items defined in an enum
...
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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...
...日，RSA公司发起“第三届DES挑战赛（DES Challenge III）”。2000年1月19日，由电子边疆基金会组织研制的25万美元的DES解密机以22.5小时的战绩，成功地破解了 DES加密算法。DES已逐渐完成了它的历史使命。
高级加密标准（英语：Advanc...
How to access java-classes in the default-package?
...icated package and add this "package" directive at its beginning.
Update 2014: bug 6975015, for JDK7 and JDK8, describe an even stricter prohibition against import from unnamed package.
The TypeName must be the canonical name of a class type, interface type, enum type, or annotation type.
The type...
Eclipse add Tomcat 7 blank server name
... 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:
...
Get the Highlighted/Selected text
...texty <input> elements, you could use the following. Since it's now 2016 I'm omitting the code required for IE <= 8 support but I've posted stuff for that in many places on SO.
function getSelectionText() {
var text = "";
var activeEl = document.activeElement;
var active...
How to iterate over a JSONObject?
... |
edited Feb 2 at 14:07
Aramis NSR
11711 silver badge44 bronze badges
answered May 15 '12 at 3:36
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android splash screen sizes for ldpi,mdpi, hdpi, xhdpi displays ? - eg : 1024X768 pixels for ldpi
... xxhdpi displays are normal sized screens.
xlarge screens are at least 960dp x 720dp
large screens are at least 640dp x 480dp
normal screens are at least 470dp x 320dp
small screens are at least 426dp x 320dp
You can view the statistics on the relative sizes of devices on Google's dashboard wh...
Java array reflection: isArray vs. instanceof
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204
In most cases, you should use the instanceof operator to test whether an object is an array.
G...