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Is there a way to pass optional parameters to a function?
Is there a way in Python to pass optional parameters to a function while calling it and in the function definition have some code based on "only if the optional parameter is passed"
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Using HTML5/JavaScript to generate and save a file
... me, thanks to Matthew and Dennkster pointing that option out! Here is basically how I do it:
1) get all the content into a string called "content" (e.g. by creating it there initially or by reading innerHTML of the tag of an already built page).
2) Build the data URI:
uriContent = "data:applica...
What does “xmlns” in XML mean?
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It means XML namespace.
Basically, every element (or attribute) in XML belongs to a namespace, a way of "qualifying" the name of the element.
Imagine you and I both invent our own XML. You invent XML to describe people, I invent mine to describe cities...
How is the java memory pool divided?
...od data, and the code for methods and constructors. The method area is logically part of the heap but, depending on the implementation, a Java VM may not garbage collect or compact it. Like the heap memory, the method area may be of a fixed or variable size. The memory for the method area does not n...
new DateTime() vs default(DateTime)
...cal.
default(), for any value type (DateTime is a value type) will always call the parameterless constructor.
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When to Redis? When to MongoDB? [closed]
...ema-able data, MongoDB is better. [Note: both MongoDB and Redis are technically schemaless]
If you ask me, my personal choice is Redis for most requirements.
Lastly, I hope by now you have seen http://antirez.com/post/MongoDB-and-Redis.html
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How do I select text nodes with jQuery?
...itespace text nodes are included in the output (in jQuery they are automatically filtered out).
Update: Fixed bug when includeWhitespaceNodes is falsy.
function getTextNodesIn(node, includeWhitespaceNodes) {
var textNodes = [], nonWhitespaceMatcher = /\S/;
function getTextNodes(node) {
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Why would one use the Publish/Subscribe pattern (in JS/jQuery)?
...istener", so that we only need one list in the Radio class, and always can call the same function on whatever object we have that wants to listen to the signal. But that still creates a coupling between whatever interface/base class/etc we decide on and the Radio class. Basically whenever you change...
Android应用开发性能优化完全分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...含内部调运的子方法）执行的真实时间，ms单位；
Calls+Recur Calls/Total
当前方法被调运的次数及递归调运占总调运次数百分比；
CPU Time/Call
当前方法调运CPU时间与调运次数比，即当前方法平均执行CPU耗时时间；
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What's the difference between eval, exec, and compile?
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The short answer, or TL;DR
Basically, eval is used to evaluate a single dynamically generated Python expression, and exec is used to execute dynamically generated Python code only for its side effects.
eval and exec have these two differences:
eval acce...