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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...
What do the following phrases mean in C++: zero-, default- and value-initialization?
...on' is new with the C++ 2003 standard - it doesn't exist in the original 1998 standard (I think it might be the only difference that's more than a clarification). See Kirill V. Lyadvinsky's answer for the definitions straight from the standard.
See this previous answer about the behavior of operat...
How do I remove all .pyc files from a project?
...
You are not quoting {}. What would happen if accidentally word-split and deleted an intermediate path which happens to be called like a fragment of the path you found?
– Robottinosino
Apr 3 '13 at 2:58
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Is cout synchronized/thread-safe?
...f particular interest here is the fact that cout is buffered. Even if the calls to write (or whatever it is that accomplishes that effect in that particular implementation) are guaranteed to be mutually exclusive, the buffer might be shared by the different threads. This will quickly lead to corrupt...
Textarea Auto height [duplicate]
...1.5;
padding:15px 15px 30px;
border-radius:3px;
border:1px solid #F7E98D;
font:13px Tahoma, cursive;
transition:box-shadow 0.5s ease;
box-shadow:0 4px 6px rgba(0,0,0,0.1);
font-smoothing:subpixel-antialiased;
background:linear-gradient(#F9EFAF, #F7E98D);
background:-o-linear-gradie...
Do the parentheses after the type name make a difference with new?
...
Let's get pedantic, because there are differences that can actually affect your code's behavior. Much of the following is taken from comments made to an "Old New Thing" article.
Sometimes the memory returned by the new operator will be initialized, and sometimes it won't depending on wh...
What does curly brackets in the `var { … } = …` statements do?
...h JavaScript 1.7 features. The first one is block-level variables:
let allows you to declare variables, limiting its scope to the block, statement, or expression on which it is used. This is unlike the var keyword, which defines a variable globally, or locally to an entire function regardless of...
Make a link in the Android browser start up my app?
...o look at the <intent-filter> element of your Mainfest file. Specifically, take a look at the documentation for the <data> sub-element.
Basically, what you'll need to do is define your own scheme. Something along the lines of:
<intent-filter>
<data android:scheme="anton" /...
Changing iframe src with Javascript
...Selection" type="radio" onclick="go('http://calendar.zoho.com/embed/9a6054c98fd2ad4047021cff76fee38773c34a35234fa42d426b9510864356a68cabcad57cbbb1a0?title=Kevin_Calendar&type=1&l=en&tz=America/Los_Angeles&sh=[0,0]&v=1')"/><label for="day">Day</label>
I would also...
Is std::unique_ptr required to know the full definition of T?
...s. However shared_ptr and unique_ptr are partial exceptions. Some, but not all of their members can be instantiated with incomplete types. The motivation for this is to support idioms such as pimpl using smart pointers, and without risking undefined behavior.
Undefined behavior can occur when you h...