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Is it possible to ping a server from Javascript?
...ip = ip;
var _that = this;
this.img = new Image();
this.img.onload = function() {_that.good();};
this.img.onerror = function() {_that.good();};
this.start = new Date().getTime();
this.img.src = "http://" + ip;
this.timer = setTimeout(function() { _that.bad();}, 1500);...
How can I find out if I have Xcode commandline tools installed?
...command. "-bash: /usr/build/xcodebuild: No such file or directory." I have confirmed that I have xcode by running command gcc --version, which gives the gcc details. I am on Mac OS X 10.13.6.
– GAURAV SRIVASTAVA
Sep 26 '18 at 21:37
...
Vagrant reverse port forwarding?
...ort 52698 from Vagrant, as long as you logged in via vagrant ssh.
You can confirm it works by running netstat -lt on vagrant VM and taking a note on the following lines:
tcp 0 0 localhost:52698 *:* LISTEN
tcp6 0 0 ip6-localhost:52698 [::]:* ...
Set keyboard caret position in html textbox
...en they receive focus:
function addLoadEvent(func) {
if(typeof window.onload != 'function') {
window.onload = func;
}
else {
if(func) {
var oldLoad = window.onload;
window.onload = function() {
if(oldLoad)
...
Disable IPython Exit Confirmation
...s really irritating that every time I type exit() , I get prompted with a confirmation to exit; of course I want to exit! Otherwise, I would not have written exit() !!!
...
How to save as a new file and keep working on the original one in Vim?
...
I just confirmed that without the "%:h/" the file will be saved in the directory you were in when you opened vim, not where the original file was....
– RVC
Jun 24 '16 at 11:33
...
Javascript: Extend a Function
...reToo();
});
But in your specific case, it's easier to extend the global onload function:
extendFunction('onload', function(args) {
doSomethingHereToo();
});
I actually really like your question, it's making me think about different use cases.
For javascript events, you really want to add an...
Send POST data using XMLHttpRequest
...setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
xhr.onload = function () {
// do something to response
console.log(this.responseText);
};
xhr.send('user=person&pwd=password&organization=place&requiredkey=key');
Or if you can count on browser support you c...
Is file append atomic in UNIX?
...e about that? Could you provide some link about that behaviour? I found it confirmed if the descriptor is a pipe, but I couldn't find evidence that it works for any file . including normal, non-NFS file objects.
– Alan Franzoni
Mar 3 '11 at 15:22
...
Convert blob URL to normal URL
...blob);
var xhr = new XMLHttpRequest;
xhr.responseType = 'blob';
xhr.onload = function() {
var recoveredBlob = xhr.response;
var reader = new FileReader;
reader.onload = function() {
var blobAsDataUrl = reader.result;
window.location = blobAsDataUrl;
};
re...