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Check if object value exists within a Javascript array of objects and if not add a new object to arr
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edited Mar 11 '19 at 18:00
answered Apr 3 '14 at 17:21
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Are non-synchronised static methods thread safe if they don't modify static class variables?
... that is not synchronised, but does not modify any static variables is it thread-safe? What about if the method creates local variables inside it? For example, is the following code thread-safe?
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Understanding promises in Node.js
...timeouts. Another way to think of promises in node.js was that they were emitters that could emit only two events: success and error.
The cool thing about promises is you can combine them into dependency chains (do Promise C only when Promise A and Promise B complete).
By removing them from the co...
ASP.NET Identity's default Password Hasher - How does it work and is it secure?
...ssword Hasher that is default implemented in the UserManager that comes with MVC 5 and ASP.NET Identity Framework, is secure enough? And if so, if you could explain to me how it works?
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How do you select a particular option in a SELECT element in jQuery?
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For a known text:
$('.selDiv option:contains("Selection 1")')
EDIT: As commented above the OP might have been after changing the selected item of the dropdown. In version 1.6 and higher the prop() method is recommended:
$('.selDiv option:eq(1)').prop('selected', true)
In older versions...
Are global variables in PHP considered bad practice? If so, why?
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When people talk about global variables in other languages it means something different to what it does in PHP. That's because variables aren't really global in PHP. The scope of a typical PHP program is one HTTP request. Session variables actually have a wider scope than PHP "global...
Set object property using reflection
...his will throw an exception if obj doesn't have a property called Name, or it can't be set.
Another approach is to get the metadata for the property, and then set it. This will allow you to check for the existence of the property, and verify that it can be set:
using System.Reflection;
MyObject ob...
Notepad++ Multi editing
...he Alt key, click and drag to select the lines whose columns you wish to edit, and begin typing.
You can also go to Settings > Preferences..., and in the Editing tab, turn on multi-editing, to enable selection of multiple separate regions or columns of text to edit at once.
It's much more intui...
What does ellipsize mean in android?
I've added an EditText to my layout, and added a hint, and made it centered horizontally.
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Undefined reference to `sin` [duplicate]
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You have compiled your code with references to the correct math.h header file, but when you attempted to link it, you forgot the option to include the math library. As a result, you can compile your .o object files, but not build your executable.
As Pa...