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Unable to create/open lock file: /data/mongod.lock errno:13 Permission denied
How to I get mongo to use a mounted drive on ec2? I really do not understand. I attached a volume on ec2 formatted the drive as root and start as root and yet as root I cant access? I am running on ubuntu 12.04. No other mongo is running
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Regular Expression to get a string between parentheses in Javascript
...eses, grab Group 1 value.
Most up-to-date JavaScript code demo (using matchAll):
const strs = ["I expect five hundred dollars ($500).", "I expect.. :( five hundred dollars ($500)."];
const rx = /\(([^()]*)\)/g;
strs.forEach(x => {
const matches = [...x.matchAll(rx)];
console.log( Array.fr...
How to remove the border highlight on an input text element
...:
input.middle:focus {
outline-width: 0;
}
Or in general, to affect all basic form elements:
input:focus,
select:focus,
textarea:focus,
button:focus {
outline: none;
}
In the comments, Noah Whitmore suggested taking this even further to support elements that have the contenteditable ...
Merge two (or more) lists into one, in C# .NET
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You can use the LINQ Concat and ToList methods:
var allProducts = productCollection1.Concat(productCollection2)
.Concat(productCollection3)
.ToList();
Note that there are more efficient ways to do this -...
Get a specific bit from byte
I have a byte, specifically one byte from a byte array which came in via UDP sent from another device. This byte stores the on/off state of 8 relays in the device.
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Rails - How to use a Helper Inside a Controller
... use these methods. Also, including the helper into the controller exposes all the helper's methods as publicly accessible actions which is not good. view_context is the way to go in Rails 3.
– GregT
Sep 12 '13 at 3:48
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Rails update_attributes without save?
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I believe what you are looking for is assign_attributes.
It's basically the same as update_attributes but it doesn't save the record:
class User < ActiveRecord::Base
attr_accessible :name
attr_accessible :name, :is_admin, :as => :admin
end
user = User.new
user.assign_attributes({...
Memcached vs APC which one should I choose? [closed]
... want to get the best caching engine available so that my application is really fast. Of course I don't want to over-cache but I want to at least choose the best thing out there. In that article it says Memcached is slow and apc is fast so why is everyone choosing memcached ?
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Jackson with JSON: Unrecognized field, not marked as ignorable
...eserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
It will ignore all the properties that are not declared.
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Single TextView with multiple colored text
...an issue when I needed my text to be in uppercase. I was using android:textAllCaps="true" in XML and, at the same time, had my HTML content in uppercase. It wasn't working. I removed the XML attribute and it's now working fine. Be carefull, because if you use setAllCaps() in code, the same issue wil...