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Error :Request header field Content-Type is not allowed by Access-Control-Allow-Headers
...hrome are requiring an extra header. Try prepending the following to your file if you are using PHP:
header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");
Make sure that you haven't already used header in another file, o...
Get underlying NSData from UIImage
.... If you happen to be using PNG in and want PNG out, you should get a good file size and almost identical data, special PNG chunks aside.
If you want to get an exact copy of the original data (perhaps to save a file after thumbnailing, or to SHA1 it), then you need to retain it separately. You might...
How can I see the entire HTTP request that's being sent by my Python application?
...ogged, but just printed to stdout. But I want to have this info in the log files!
– lesnik
Dec 26 '19 at 14:22
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Capturing TAB key in text box [closed]
...pt in my HTML) so I prefer to put my event handling logic in my JavaScript files. Additionally, not all browsers implement event (or e) the same way. You may want to do a check prior to running any logic:
document.onkeydown = TabExample;
function TabExample(evt) {
var evt = (evt) ? evt : ((event...
Output of git branch in tree like fashion
...riment merged in (only locally)
NOTE: working directory contains modified files
git-wtf shows you:
How your branch relates to the remote repo, if it's a tracking branch.
How your branch relates to non-feature ("version") branches, if it's a feature branch.
How your branch relates t...
Python Infinity - Any caveats?
...07807929942597e+154
>>> _**2
Traceback (most recent call last):
File "<stdin>", line 1, in ?
OverflowError: (34, 'Numerical result out of range')
The inf value is considered a very special value with unusual semantics, so it's better to know about an OverflowError straight away th...
NameError: global name 'xrange' is not defined in Python 3
...wnload the package named future,such as pip install future.And in your .py file input this "from past.builtins import xrange".This method is for the situation that there are many xranges in your file.
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How to loop through a HashMap in JSP?
...entry.getValue();
// ...
}
However, scriptlets (raw Java code in JSP files, those <% %> things) are considered a poor practice. I recommend to install JSTL (just drop the JAR file in /WEB-INF/lib and declare the needed taglibs in top of JSP). It has a <c:forEach> tag which can iter...
Difference between android.app.Fragment and android.support.v4.app.Fragment
...er include the bytecode inside the runtime of the device or inside the jar file of the application. Support library code will be put in your jar, and provide the same feature as the runtime-provided code, so there's no reason not to use the modern and maintained support library instead of the ageing...
How can I download HTML source in C#
...
You can download files with the WebClient class:
using System.Net;
using (WebClient client = new WebClient ()) // WebClient class inherits IDisposable
{
client.DownloadFile("http://yoursite.com/page.html", @"C:\localfile.html");
//...