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How do I find which transaction is causing a “Waiting for table metadata lock” state?
...TIONS
We can use INFORMATION_SCHEMA Tables.
Useful Queries
To check about all the locks transactions are waiting for:
USE INFORMATION_SCHEMA;
SELECT * FROM INNODB_LOCK_WAITS;
A list of blocking transactions:
SELECT *
FROM INNODB_LOCKS
WHERE LOCK_TRX_ID IN (SELECT BLOCKING_TRX_ID FROM INNO...
Debugging iframes with Chrome developer tools
... least retain and show the console for the frame with all the old/previous output?
– Bizmate
Nov 14 '16 at 23:05
2
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displayname attribute vs display attribute
...ay attribute (new in MVC3 and .NET4) supports ResourceType overload as an "out of the box" property.
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What does “@” mean in Windows batch scripts
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It means not to output the respective command. Compare the following two batch files:
@echo foo
and
echo foo
The former has only foo as output while the latter prints
H:\Stuff>echo foo
foo
(here, at least). As can be seen the co...
How to install packages offline?
... your source directory. You can hack on things, and then rerun the app without rebuilding anything.
If you want to install your app and its dependencies into the current python environment, you'll do something like this:
$ cd ~/src/myapp
$ easy_install --always-unzip --allow-hosts=None --find-lin...
How to create a template function within a class? (C++)
...omething is defined at - but that sometimes isn't true, as in all cases of out-of-class definitions)
– Johannes Schaub - litb
Jun 10 '09 at 8:48
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Java's Interface and Haskell's type class: differences and similarities?
...ions. The operations themselves are described via their names, inputs, and outputs. Likewise there may be many implementations of these operations that will likely differ in their implementation.
With that out of the way, here are some notable differences:
Interfaces methods are always associated...
Are Duplicate HTTP Response Headers acceptable?
I have not found any specification about whether duplicate HTTP response headers are allowed by the standard, but I need to know if this will cause compatibility issues.
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$(window).scrollTop() vs. $(document).scrollTop()
...
They are both going to have the same effect.
However, as pointed out in the comments: $(window).scrollTop() is supported by more web browsers than $('html').scrollTop().
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Can CSS detect the number of children an element has?
... to do. If you want to style all elements if there are 8 children, you're out of luck. If, however, you want to apply styles to the 8th and later elements, try this:
p:nth-child( n + 8 ){
/* add styles to make it pretty */
}
Unfortunately, these probably aren't the solutions you're looking ...