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Getting a better understanding of callback functions in JavaScript
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You can just say
callback();
Alternately you can use the call method if you want to adjust the value of this within the callback.
callback.call( newValueForThis);
Inside the function this would be whatever newValueForThis is.
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How can I detect if a browser is blocking a popup?
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If you use JavaScript to open the popup, you can use something like this:
var newWin = window.open(url);
if(!newWin || newWin.closed || typeof newWin.closed=='undefined')
{
//POPUP BLOCKED
}
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How do I check if I'm running on Windows in Python? [duplicate]
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Python os module
Specifically for Python 3.6/3.7:
os.name: The name of the operating
system dependent module imported. The
following names have currently been
registered: 'posix', 'nt', 'java'.
In your case, you want to check for 'nt'...
How would Git handle a SHA-1 collision on a blob?
...ust reduced the hash size from 160-bit to 4-bit by applying the following diff and rebuilding git:
--- git-2.7.0~rc0+next.20151210.orig/block-sha1/sha1.c
+++ git-2.7.0~rc0+next.20151210/block-sha1/sha1.c
@@ -246,6 +246,8 @@ void blk_SHA1_Final(unsigned char hashou
blk_SHA1_Update(ctx, padlen, 8...
Wait 5 seconds before executing next line
...ut:
function stateChange(newState) {
setTimeout(function () {
if (newState == -1) {
alert('VIDEO HAS STOPPED');
}
}, 5000);
}
Any other code will execute immediately.
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Asking the user for input until they give a valid response
... successfully parsed!
#we're ready to exit the loop.
break
if age >= 18:
print("You are able to vote in the United States!")
else:
print("You are not able to vote in the United States.")
Implementing Your Own Validation Rules
If you want to reject values that Python ca...
Best way to test if a row exists in a MySQL table
I'm trying to find out if a row exists in a table. Using MySQL, is it better to do a query like this:
12 Answers
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Is there any async equivalent of Process.Start?
...'t wait until it finishes, so it doesn't make much sense to make it async. If you still want to do it, you can do something like await Task.Run(() => Process.Start(fileName)).
But, if you want to asynchronously wait for the process to finish, you can use the Exited event together with TaskComple...
Is there a way to delete a line in Visual Studio without cutting it?
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answered Sep 17 '10 at 0:55
Kirk WollKirk Woll
68.3k1818 gold badges169169 silver badges184184 bronze badges
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Checking if all elements in a list are unique
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Not the most efficient, but straight forward and concise:
if len(x) > len(set(x)):
pass # do something
Probably won't make much of a difference for short lists.
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