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MongoDB/NoSQL: Keeping Document Change History
... changes to one or more specific entities in a database. I've heard this called row versioning, a log table or a history table (I'm sure there are other names for it). There are a number of ways to approach it in an RDBMS--you can write all changes from all source tables to a single table (more of...
JavaScript Regular Expression Email Validation [duplicate]
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If you define your regular expression as a string then all backslashes need to be escaped, so instead of '\w' you should have '\\w'.
Alternatively, define it as a regular expression:
var pattern = /^\w+@[a-zA-Z_]+?\.[a-zA-Z]{2,3}$/;
BTW, please don't validate email address...
JFrame in full screen Java
...eason. I created one AppFrame class (with some default properties) and in order to make any class as JFrame I simply extend it. It has setVisible as true. Now above three lines has to be in same order, if visible is before ExtendedState you will get below error. When I corrected order error gone...
Eclipse cannot load SWT libraries
... I get an Unsatisfied Link Error and it will not open. I have recently installed the java JDK and Android SDK, could this be the problem? I followed this tutorial .
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How can I change an element's text without changing its child elements?
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This won't preserve the order of the nodes, however. e.g. if the text was at the end of the element first, it would now be at the start.
– Matt
Aug 31 '15 at 17:47
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How to choose the right bean scope?
...n in some broader scope which has overridden Map#put() and/or Map#get() in order to have more fine grained control over bean creation and/or destroy.
The JSF @NoneScoped and CDI @Dependent basically lives as long as a single EL-evaluation on the bean. Imagine a login form with two input fields refer...
Node: log in a file instead of the console
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Due to a recent change, you can't call stderr.pipe() anymore - it takes this now: process.__defineGetter__('stderr', function() { return fs.createWriteStream(__dirname + '/error.log', {flags:'a'}) })
– damianb
Feb 23 '13 ...
Google Chrome Extensions - Can't load local images with CSS
...ion that uses the content script feature to modify a website. More specifically, the background-image of said website.
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“The underlying connection was closed: An unexpected error occurred on a send.” With SSL Certificate
...ed to TLS 1.2. As a result I had to install .net 4.5.2 on my web server in order to support it.
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Add a column to existing table and uniquely number them on MS SQL Server
...be of type IDENTITY (auto-increment), or you want to be specific about the order in which your rows are numbered, you can add a column of type INT NULL and then populate it like this. In my example, the new column is called MyNewColumn and the existing primary key column for the table is called MyP...