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Amazon EC2, mysql aborting start because InnoDB: mmap (x bytes) failed; errno 12
... the crash you may need to setup a swap space for your micro instance. Actually performance wise is better to enable swap.
Steps below show how to make a swap space for your Micro instance. I assume you have AWS Account with a Micro instance running.
Run dd if=/dev/zero of=/swapfile bs=1M count=102...
AngularJS: ng-repeat list is not updated when a model element is spliced from the model array
...
If you add a $scope.$apply(); right after $scope.pluginsDisplayed.splice(index,1); then it works.
I am not sure why this is happening, but basically when AngularJS doesn't know that the $scope has changed, it requires to call $apply manually. I am also new to AngularJS so cannot explain this bett...
Cannot add or update a child row: a foreign key constraint fails
... Referential integrity is supported by the presence of the correct index entries. As long as you've got your keys and indexes right, you should be able to disable the key check during a bulk input.
– Vernon Keenan
Jan 28 at 20:23
...
What does “javascript:void(0)” mean?
...rator is often used merely
to obtain the undefined primitive
value, usually using “void(0)” (which
is equivalent to “void 0”). In these
cases, the global variable undefined
can be used instead (assuming it has
not been assigned to a non-default
value).
An explanation is provi...
No module named pkg_resources
...
Reported the bug to CentOS.org bugs.centos.org/view.php?id=14042
– rjt
Oct 20 '17 at 19:22
...
Database design for audit logging
...) and the date/time of that change.
The following SQL creates the blog and indexes the deleted column:
CREATE TABLE `blog` (
`id` mediumint(8) unsigned NOT NULL AUTO_INCREMENT,
`title` text,
`content` text,
`deleted` tinyint(1) unsigned NOT NULL DEFAULT '0',
PRIMARY KEY (`id`),
...
When to use next() and return next() in Node.js
...ncrete implementation that makes us avoid the use of next ()!
In the file index.js
//index.js the entry point to the application also caller app.js
const express = require('express');
const app = express();
const usersRoute = require('./src/route/usersRoute.js');
app.use('/users', usersRoute );
...
Rails nested form with has_many :through, how to edit attributes of join model?
... }
}
}
}
}
Notice how linkers_attributes is actually a zero-indexed Hash with String keys, and not an Array? Well, this is because the form field keys that are sent to the server look like this:
topic[name]
topic[linkers_attributes][0][is_active]
topic[linkers_attributes][0][article...
jquery $(window).height() is returning the document height
...
With no doctype tag, Chrome reports the same value for both calls.
Adding a strict doctype like <!DOCTYPE html> causes the values to work as advertised.
The doctype tag must be the very first thing in your document. E.g., you can't have any text before it, even if it doesn't re...
JavaScript loop through json array?
...t least in chrome 30 this works as expected
var logAr = function(element, index, array) {
console.log("a[" + index + "] = " + element);
}
ar.forEach(logAr); // returns a[0] = a, a[1] = b, a[4] = c
Links
see for in at the mdn
the new forEach method
a comment that states that array comprehens...