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Is there an “exists” function for jQuery?
...se, everything else true. So you could write:
if ($(selector).length)
You don't need that >0 part.
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How do I check whether a file exists without exceptions?
How do I check if a file exists or not, without using the try statement?
39 Answers
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How do I get the fragment identifier (value after hash #) from a URL?
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No need for jQuery
var type = window.location.hash.substr(1);
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Replace all elements of Python NumPy Array that are greater than some value
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I think both the fastest and most concise way to do this is to use NumPy's built-in Fancy indexing. If you have an ndarray named arr, you can replace all elements >255 with a value x as follows:
arr[arr > 255] = x
I ran this on my machine with a 500 x 500 random ma...
How to upload a project to Github
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Since I wrote this answer, github released a native windows client which makes all the below steps redundant.
You can also use sourcetree to get both git and mercurial setup on Windows.
Here is how you would do it in Windows:
If you don't have git installed, see this articl...
How do I pass JavaScript variables to PHP?
...e to the current page PHP code... PHP code runs at the server side, and it doesn't know anything about what is going on on the client side.
You need to pass variables to PHP code from the HTML form using another mechanism, such as submitting the form using the GET or POST methods.
<DOCTYPE html...
How do I clear all options in a dropdown box?
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You can use the following to clear all the elements.
var select = document.getElementById("DropList");
var length = select.options.length;
for (i = length-1; i >= 0; i--) {
select.options[i] = null;
}
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What is the difference between up-casting and down-casting with respect to class variable
What is the difference between up-casting and down-casting with respect to class variable?
10 Answers
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Inject service in app.config
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Alex provided the correct reason for not being able to do what you're trying to do, so +1. But you are encountering this issue because you're not quite using resolves how they're designed.
resolve takes either the string of a service or a function returning a value to be injecte...
How do I launch the Android emulator from the command line?
...ssume that you have built your project and just need to launch it, but you don't have any AVDs created and have to use command line for all the actions. You have to do the following.
Create a new virtual device (AVD) for the platform you need. If you have to use command line for creating your AVD,...