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Are parallel calls to send/recv on the same socket valid?
...send/recv then yes, you can call them simultaneously from multiple threads and things will work.
This doesn't necessarily mean that they'll be executed in parallel -- in the case of multiple sends, the second will likely block until the first completes. You probably won't notice this much, as a se...
Select2 dropdown but allow new values by user?
...
For version 4+ check this answer below by Kevin Brown
In Select2 3.5.2 and below, you can use something like:
$(selector).select2({
minimumInputLength:1,
"ajax": {
data:function (term, page) {
return { term:term, page:page };
},
dataType:"json",
quietMillis:100,
re...
What's the difference between a catalog and a schema in a relational database?
... other things--all of the various schemas (external, conceptual, internal) and all of the corresponding mappings (external/conceptual, conceptual/internal) are kept.
In other words, the catalog contains detailed information (sometimes called descriptor information or metadata) regarding the va...
What does the `#` operator mean in Scala?
... such a subclass. In other words, there's no A.B class, but there are a1.B and a2.B classes, and they are different classes, as the error message is telling us above.
If you did not understand that, look up path dependent types.
Now, # makes it possible for you to refer to such nested classes with...
Bootstrap 3 Navbar Collapse
...cs/4.0/components/navbar/#responsive-behaviors
You have to use .navbar-expand{-sm|-md|-lg|-xl} classes:
<nav class="navbar navbar-expand-md navbar-light bg-light">
Bootstrap 3
@media (max-width: 991px) {
.navbar-header {
float: none;
}
.navbar-toggle {
display:...
How to select an element by classname using jqLite?
...rying to remove jquery from my Angular.js app in order to make it lighter, and put Angular's jqLite instead. But the app makes heavy use of find('#id') and find ('.classname'), which are not supported by jqLite, only 'tag names' (as per documentation)
...
Why are Objective-C delegates usually given the property assign instead of retain?
I'm surfing through the wonderful blog maintained by Scott Stevenson, and I'm trying to understand a fundamental Objective-C concept of assigning delegates the 'assign' property vs 'retain'. Note, the both are the same in a garbage collected environment. I'm mostly concerned with a non-GC based envi...
Intellij IDEA, format all code in a project
...on a larger project with other developers who don't conform to your style, and you're using IntelliJ to transform all their code every time you edit it, you might be causing a problem with your version control system. It will long a huge volume of changes when you check in, and few of them will hav...
async await return Task
...e wrapped in Task, If you return int it will be wrapped in Task<int> and so on.
If your async method needs to return int you'd mark the return type of the method as Task<int> and you'll return plain int not the Task<int>. Compiler will convert the int to Task<int> for you.
...
Is it possible to roll back CREATE TABLE and ALTER TABLE statements in major SQL databases?
... on a program that issues DDL. I would like to know whether CREATE TABLE and similar DDL can be rolled back in
5 Answers
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