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Eager load polymorphic
...w you join a table named by the value stored in a column. By defining the extra relationship belongs_to :shop, you are giving ActiveRecord the information it needs to complete the join.
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Overloading member access operators ->, .*
...ow is pointing at."
Bruce Eckel: Thinking CPP Vol-one : operator->
The extra functionality is provided for convenience, so you do not have to call
a->->func();
You can simply do:
a->func();
That makes operator -> different from the other operator overloads.
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How to override trait function and call it from the overridden function?
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An alternative approach if interested - with an extra intermediate class to use the normal OOO way. This simplifies the usage with parent::methodname
trait A {
function calc($v) {
return $v+1;
}
}
// an intermediate class that just uses the trait
class I...
git-diff to ignore ^M
...f, git show, etc.
It appears to leave other settings as-is; for instance, extra spaces at the end of a line still show as errors (highlighted in red) in the diff.
(Other answers have alluded to this, but the above is exactly how to set the setting. To set the setting for only one project, omit th...
innerText vs innerHTML vs label vs text vs textContent vs outerText
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text and label remove extra spaces. I got these results when querying options in a dropdown:
e.textContent = "A B C D "
e.text = "A B C D"
e.label = "A B C D"
s...
How does git store files?
... gc --aggressive uses value 250, which makes it run very slow, but provide extra compression for history data.
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Center/Set Zoom of Map to cover all visible Markers?
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An extra tip for anyone interested. You can define a padding by using fitBounds(bounds, int) which will allow you to have a little space between the markers and the map edges (or less space if you need). See Documentation
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Optimistic vs. Pessimistic locking
...essential that the data is accurately read, with no un-shown changes - the extra locking overhead is worth it.
Oh, and Microsoft SQL server defaults to page locking - basically the row you're reading and a few either side. Row locking is more accurate but much slower. It's often worth setting your...
What exactly is Heroku?
... more cost effective to pay someone to build your own solution or take the extra expense.
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How would Git handle a SHA-1 collision on a blob?
...0151210/block-sha1/sha1.c
@@ -246,6 +246,8 @@ void blk_SHA1_Final(unsigned char hashou
blk_SHA1_Update(ctx, padlen, 8);
/* Output hash */
- for (i = 0; i < 5; i++)
- put_be32(hashout + i * 4, ctx->H[i]);
+ for (i = 0; i < 1; i++)
+ put_be32(hashout + i * 4, (ctx->...