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Are braces necessary in one-line statements in JavaScript?
I once heard that leaving the curly braces in one-line statements could be harmful in JavaScript. I don't remember the reasoning anymore and a Google search did not help much.
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How to get object size in memory? [duplicate]
I need to know how much bytes my object consumes in memory (in C#). for example how much my Hashtable , or SortedList , or List<String> .
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Linq select objects in list where exists IN (A,B,C)
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Your status-codes are also a collection, so use Contains:
var allowedStatus = new[]{ "A", "B", "C" };
var filteredOrders = orders.Order.Where(o => allowedStatus.Contains(o.StatusCode));
or in query syntax:
var filteredOrders = from order in orders.Order
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使用 XML 和 Web 服务 · App Inventor 2 中文网
...使用 XML 和 Web 服务
The Web.XMLTextDecode takes a given XML text string and decodes it to produce a list. If the text is not well-formed XML, it will signal an error and return the empty list.
The list returned by XMLTextDecode contains one pair for each top-level tag-delimited structure i...
bash HISTSIZE vs. HISTFILESIZE?
What is the difference in HISTSIZE vs. HISTFILESIZE ?
2 Answers
2
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Logic to test that 3 of 4 are True
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I suggest writing the code in a manner that indicates what you mean. If you want 3 values to be true, it seems natural to me that the value 3 appears somewhere.
For instance, in C++:
if ((int)a + (int)b + (int)c + (int)d == 3)
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What is the _snowman param in Ruby on Rails 3 forms for?
In Ruby on Rails 3 (currently using Beta 4), I see that when using the form_tag or form_for helpers there is a hidden field named _snowman with the value of ☃ ( Unicode \x9731) showing up.
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Maintain the aspect ratio of a div with CSS
I want to create a div that can change its width/height as the window's width changes.
27 Answers
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How can I get a collection of keys in a JavaScript dictionary? [duplicate]
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Use Object.keys() or shim it in older browsers...
const keys = Object.keys(driversCounter);
If you wanted values, there is Object.values() and if you want key and value, you can use Object.entries(), often paired with Array.prototype.forEach() like th...