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Why can lambdas be better optimized by the compiler than plain functions?
...ions here: the one we are passing the lambda to (e.g. std::sort, or map in my example) and the lambda itself. The lambda is usually small. The other function – not necessarily. We’re concerned with inlining calls to the lambda inside the other function.
– Konrad Rudolph
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Can I get a list of files marked --assume-unchanged?
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My OS apparently has a weird collation setup, so Matt's command didn't work for me. Here's what I added under the [alias] section of my .gitconfig: ignored = !git ls-files -v | grep "^[[:lower:]]"
– Abe...
What it the significance of the Javascript constructor property?
...really any difference between types and instances). When you write x = new MyType(), what happens (among other things) is that x.__proto___ is set to MyType.prototype.
The question
Now, the above should be all you need to derive what your own example means, but to try and answer your actual questi...
Is there an equivalent to e.PageX position for 'touchstart' event as there is for click event?
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My saviour! Works perfectly even for touchmove().
– Tibix
Sep 25 '18 at 9:05
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How to use shared memory with Linux in C
I have a bit of an issue with one of my projects.
5 Answers
5
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How to change the foreign key referential action? (behavior)
... fk_name and table2 is referred table with key t2 (something like below in my diagram).
table1 [ fk_table2_id ] --> table2 [t2]
First step, DROP old CONSTRAINT: (reference)
ALTER TABLE `table1`
DROP FOREIGN KEY `fk_name`;
notice constraint is deleted, column is not deleted
Seco...
Is it OK to use Gson instance as a static field in a model bean (reuse)?
...parsing and formatting. As it turned out, the thread-safety issue was with my method's use of a static SimpleDateFormat instance which is not thread-safe. Once I wrapped the static SimpleDateFormat in a ThreadLocal instance, everything worked out fine.
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Limiting the number of records from mysqldump?
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As skaffman says, use the --where option:
mysqldump --opt --where="1 limit 1000000" database
Of course, that would give you the first million rows from every table.
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Java - get pixel array from image
...est way to get pixel data (int the form int[][] ) from a BufferedImage . My goal is to be able to address pixel (x, y) from the image using int[x][y] . All the methods I have found do not do this (most of them return int[] s).
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Can multiple different HTML elements have the same ID if they're different elements?
...ed (which is how all browsers currently handle the situation anyway) - see my answer below for more.
– mltsy
May 16 '17 at 18:32
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