Copy the package installer unit file to /etc where changes will not be overwritten on an upgrade:
cp /lib/systemd/system/docker.service /etc/systemd/system/docker.service
Update /etc/systemd/system/docker.service with your options on ExecStart:
ExecStart=/usr/bin/dockerd -H fd:// -H tcp://0.0.0...
For example, in the sentence:
That cake is extremely nice.
The rules of the English language would make cake a noun, extremely an adverb that modifies the adjective nice, and through this analysis the meaning could be understood.
However, this analysis is dependent on us recognising that the...
This pattern will allow you to filter lines depending on its length
$cat file
AAAAA
BBBB
CCCC
DDDD
EEEE
$awk 'length($0) > 4 { print $0 }' file
AAAAA
$
Anyway, the pattern will allow the next code block to be executed, then, as the default action for AWK is printing the current ...
Pattern matching can be used effectively with awk as it controls the actions that follows it i.e. { pattern } { action }. One cool use of the pattern-matching is to select multiple between two patterns in a file say patternA and patternB
$ awk '/patternA/,/patternB/' file
Assume my file contents...
.default-settings() {
padding: 4px;
margin: 4px;
font-size: 16px;
border: 1px solid gray;
}
#demo {
.default-settings;
}
The above example when compiled would only produce the following output. The .default-settings() mixin definition would not be output in the compiled CSS fi...
This trick helps you select an element using the ID as a value for an attribute selector to avoid the high specificity of the ID selector.
HTML:
<div id="element">...</div>
CSS
#element { ... } /* High specificity will override many selectors */
[id="element&quo...
A simple EntitySystem that processes each entity of a given family in the order specified by a comparator and calls processEntity() for each entity every time the EntitySystem is updated. This is really just a convenience class as rendering systems tend to iterate over a list of entities in a sort...
iOS 6
Within a single line, we can get an UUID like below:
Swift
let UDIDString = UIDevice.currentDevice().identifierForVendor?.UUIDString
Objective-C
NSString *UDIDString = [[[UIDevice currentDevice] identifierForVendor] UUIDString];
The identifierForVendor is an unique identifier that st...
var client = new MongoClient("mongodb://localhost:27017");
var database = client.GetDatabase("test");
var collection = database.GetCollection < Interactions > ("Interactions");
var newItem = new Interactions{
SiteName = "Example",
Pages = ...
var client = new MongoClient("mongodb://localhost:27017");
var database = client.GetDatabase("test");
var collection = database.GetCollection < Interactions > ("Interactions");
var result = IMongoCollectionExtensions
.AsQueryable(collection)
...
To comment on power scripts by prepending the line using the # (hash) symbol
# This is a comment in powershell
Get-ChildItem
You can also have multi-line comments using <# and #> at the beginning and end of the comment respectively.
<#
This is a
multi-line
comment
#>
Get-Chil...
To ensure that all possible items are documented, you can use the missing_docs link to receive warnings/errors from the compiler. To receive warnings library-wide, place this attribute in your lib.rs file:
#![warn(missing_docs)]
You can also receive errors for missing documentation with this lin...
Rust provides two types of documentation comments: inner documentation comments and outer documentation comments. Examples of each are provided below.
Inner Documentation Comments
mod foo {
//! Inner documentation comments go *inside* an item (e.g. a module or a
//! struct). They use th...
/// In documentation comments, you may use **Markdown**.
/// This includes `backticks` for code, *italics* and **bold**.
/// You can add headers in your documentation, like this:
/// # Notes
/// `Foo` is unsuitable for snafucating. Use `Bar` instead.
struct Foo {
...
}
/// It is cons...
Code in documentation comments will automatically be executed by cargo test. These are known as "documentation tests", and help to ensure that your examples work and will not mislead users of your crate.
You can import relative from the crate root (as if there were a hidden extern crate ...
To reference a variable in a query, add a colon (:) before the variable name.
Datetime targetDate = Datetime.now().addDays(-7);
List<Lead> recentLeads = [SELECT Id FROM Lead WHERE CreatedDate > :targetDate];
string targetName = 'Unknown';
List<Contact> incompleteContacts = [SELE...
