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How can I check for “undefined” in JavaScript? [duplicate]
.../ true
As @CMS pointed out, this has been patched in ECMAScript 5th ed., and undefined is non-writable.
if (window.myVar) will also include these falsy values, so it's not very robust:
false
0
""
NaN
null
undefined
Thanks to @CMS for pointing out that your third case - if (myVariable) can als...
Why does `True == False is False` evaluate to False? [duplicate]
...comparison, so
True == False is False
is equivalent to
(True == False) and (False is False)
This can be surprising in this case, but lets you write 1 <= x < 4 unlike in other languages like C.
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How to get mouse position in jQuery without mouse-events?
...ve there's a way to query the mouse position, but you can use a mousemove handler that just stores the information away, so you can query the stored information.
jQuery(function($) {
var currentMousePos = { x: -1, y: -1 };
$(document).mousemove(function(event) {
currentMousePos.x = ...
How to debug a referenced dll (having pdb)
I have two solutions in my workspace, say A and B.
10 Answers
10
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Google Chrome Extensions - Can't load local images with CSS
... @Salem It would be inconvenient to develop as unpacked extension id and uploaded to the gallery one have different ids. It's not the end of the world, just inconvenience and sort of bad practice, just like hardcoding absolute file pathes in the code for example.
– serg
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Android Studio/Intellij Idea: “Table of Contents” for a class
I have been messing around with Android Studio and so far I like most of what I have seen. One thing that has been annoying me though is this lack of "Table of Contents" for a class. I apologize for not knowing exactly what to call it. But what I am referring to is the dropdown menu in eclipse that ...
How to use Git?
... I have zero experience with any kind of version control system. My understanding is somehow they make distribution of projects easier.
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How to set JFrame to appear centered, regardless of monitor resolution? [closed]
...to not set it visible until AFTER you center it. This way it won't appear and then jump around. As long as you have packed the frame or set the dimensions before the code in this answer, you will be fine.
– Erick Robertson
Oct 9 '15 at 14:51
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Authorize Attribute with Multiple Roles
...n let my Role be an enum rather than a string. What would a good namespace and location in the project hierarchy be for placing this custom authorize attribute?
– Simon Shine
Oct 5 '15 at 9:46
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What's the difference between Html.Label, Html.LabelFor and Html.LabelForModel
What's the difference between @Html.Label() , @Html.LabelFor() and @Html.LabelForModel() methods?
4 Answers
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