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Possible to do a MySQL foreign key to one of two possible tables?
Well here's my problem I have three tables; regions, countries, states. Countries can be inside of regions, states can be inside of regions. Regions are the top of the food chain.
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How to get HTTP Response Code using Selenium WebDriver
..."frame":{"securityOrigin":"://","loaderId":"172.1","name":"chromedriver dummy frame","id":"172.2","mimeType":"text/html","parentId":"172.1","url":"about:blank"}}}}
{"webview":"3b8eaedb-bd0f-4baa-938d-4aee4039abfe","message":{"method":"Page.frameStoppedLoading","params":{"frameId":"172.2"}}}
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ArithmeticException: “Non-terminating decimal expansion; no exact representable decimal result”
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I had this same problem, because my line of code was:
txtTotalInvoice.setText(var1.divide(var2).doubleValue() + "");
I change to this, reading previous Answer, because I was not writing decimal precision:
txtTotalInvoice.setText(var1.divide(var2,4, Round...
Check if null Boolean is true results in exception
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I struggle to understand why if (myBoolean) (where myBoolean is Boolean) does not raise a compiler error or at least a warning. This is a gotcha for sure.
– Josh M.
Dec 13 '18 at 13:50
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Why doesn't delete set the pointer to NULL?
...ress, a number. It might as well be an int with a dereference operation. My point is you would have to also scan every single pointer to find those that are referencing the same memory you just deleted, and null them out as well. It would be computationally intense to scan all the pointers for th...
Referring to a Column Alias in a WHERE Clause
...r syntax for a sub-query, so the performance would be similar to that. In my experience, the performance difference has not been something that has concerned me for operations like this, but it should be fairly simple to test it in your environment to see if your specific table/query is adversely a...
How to pad zeroes to a string?
... gave me the opportunity to remove some irrelevant and outdated stuff from my answer.
– Konrad Rudolph
Jun 12 '19 at 9:31
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Click outside menu to close in jquery
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I found a variant of Grsmto's solution and Dennis' solution fixed my issue.
$(".MainNavContainer").click(function (event) {
//event.preventDefault(); // Might cause problems depending on implementation
event.stopPropagation();
$(document).one('click', function (e) {
i...
How to declare string constants in JavaScript? [duplicate]
...stants in JavaScript, but to declare a literal all you have to do is:
var myString = "Hello World";
I'm not sure what you mean by store them in a resource file; that's not a JavaScript concept.
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How to check if a file is empty in Bash?
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@geedoubleya answer is my favorite.
However, I do prefer this
if [[ -f diff.txt && -s diff.txt ]]
then
rm -f empty.txt
touch full.txt
elif [[ -f diff.txt && ! -s diff.txt ]]
then
rm -f full.txt
touch empty.txt
else
echo ...