cd /usr/share/icons # cd to global icons dirChoose Mouse option from Applications Menu
sudo rm default # remove if default exists
# create a symlink setting oxy-neon (which is the name of the folder containing mouse icon theme) as the default mouse theme
sudo ln -s oxy-neon default
-> Settings and select the Theme tab and choose Default as the pointer. Logout and the new mouse theme appears.make gives the following error.rebar was unexpected at this time.However, if you have access to a GNU/Linux system, you can build it there, get the
make: *** [compile] Error 255
.beam files inside the ebin directory over to Windows, which can be loaded by the EVM running on Windows.C:\lfe-ebin, open the Erlang shell and run the following1> cd("c:/lfe-bin").
c:/lfe-bin
ok
2> lfe_shell:start().
LFE Shell V5.10.3 (abort with ^G)
<0.331.0>
>
Enjoy!(1..100).each{println"${it%3?'':'Fizz'}${it%5?'':'Buzz'}"?:it}JavaScript version in 66 characters, but a bit convoluted.i=0;while(i++!=100)console.log((i%3?'':'Fizz')+(i%5?'':'Buzz')||i)
java.util.concurrent.* classes. An article by Edgardo Hernandez demonstrates the usage with Java. Let's use Groovy and GPars to do something similar.import groovyx.gpars.GParsPoolThis can be run using
public class Task {
def compute(int msg) {
String str = "";
long begTest = new java.util.Date().getTime();
System.out.println("start - Task "+ msg);
try {
Thread.sleep(1000);
for(int i = 0; i < 20000; i++)
str = str + 't';
} catch (InterruptedException e) {}
Double secs = new Double((new java.util.Date().getTime() - begTest)*0.001);
System.out.println("run time " + secs + " secs");
return msg;
}
}
final def task = new Task()
def seq = {
println "sequential"
long b = new Date().getTime()
(1..5).each {
task.compute(it)
long e = new Date().getTime()
println e-b
}
}()
println "\nparallel"
GParsPool.withPool { //pool size will be automatically computed (if nothing is specified).
long b = new Date().getTime()
(1..5).eachParallel { // executes each block in parallel and statement within the block sequentially.
task.compute(it)
long e = new Date().getTime()
println e-b
}
}
println "\nasync (demo)"
long start = new Date().getTime()
// Say we have few tasks that needs to be computed asynchronously while doing other computations.
def a = {task.compute(1)} // define the tasks in a block
def b = {task.compute(2)}
def c = {task.compute(3)}
def d = {task.compute(4)}
def e = {task.compute(5)}
def results = GParsPool.withPool {
[a,b,c,d,e]*.callAsync() // perform the tasks in the background
}
// continue with other tasks..
results*.get() // now we need the results to continue further. Get the result (if not done yet, it waits till done).
// do further computation with the obtained results..
long stop = new Date().getTime()
println stop-start
groovyConsole. GPars must be in the classpath or included using grapes. In my test system having dual cores, the time taken are around 10375ms, 6578ms, 6234ms for sequential, parallel, and async tasks respectively. In a single core atom processor the average time for 3 runs are as 13792ms, 10771ms and 9078ms respectively.D(L) displays the elements in the list L.1> D = fun(F, []) -> ok;If the binding takes place before the function definition, we could have written like
1> (F, [H|T]) -> io:format("~p~n", [H]), F(F,T) end.
#Fun<erl_eval.12.82930912>
2> D(D, [a,b,c]).
a
b
c
ok
1> G = fun([]) -> ok;but, we can see that it gives an error. This is similar to a fixed-point combinator like a Y combinator.
1> ([H|T]) -> io:format("~p~n", [H]), G(T) end.
* 2: variable 'G' is unbound
#!/usr/bin/env escriptI am testing this using
% Read input as an integer
read_input(Inp) ->
case io:fread("", "~d") of
eof ->
% display the list
io:format("~p~n", [lists:reverse(Inp)]),
ok;
{ok, [N]} ->
read_input([N|Inp]);
_ -> read_input(Inp)
end.
split(S, D) ->
re:split(S, D, [{return,list}]).
%% Read input as a string
read_input() ->
case io:get_line("") of
eof ->
ok;
N ->
% display the list
L = lists:map(fun(X) -> list_to_integer(X) end, split(string:strip(N--"\n"), " ")),
io:format("~p~n", [L])
end.
main(_) ->
%read_input([]).
read_input().
escript without -mode(compile) which interprets the code.read_input([]) function took to read and display a line of 1000 integers (around 7 digits each) was 2.235s and read_input() took only 0.750s. The average for 7 runs were 2.256s and 0.77s respectively. In the first method we can see that the list is created by appending elements to the head which is a really fast operation. Which shows that it is better to reduce the number IO calls and get the input as a chuck.caseless as one of the options.1> S = "Hi there, hello there. Hello world!".
"Hi there, hello there. Hello world!"
2> re:run(S, "hello", [global, caseless]).
{match,[[{10,5}],[{23,5}]]}
3> re:run(S, "hello", [global]).
{match,[[{10,5}]]}
4> re:run(S, "hello", []).
{match,[{10,5}]}
-module(ql).
-export([trunc/2]).
%% Truncates a floating point number F to N decimal places ignoring trailing zeros.
-spec trunc(float()|integer(), integer()) -> float().
trunc(F, N) ->
Prec = math:pow(10, N),
trunc(F*Prec)/Prec.
1> c(ql).
{ok,ql}
2> ql:trunc(3.1415926525, 4).
3.1415
3> ql:trunc(3.1400, 4).
3.14
4> ql:trunc(3.0, 4).
3.0
5> ql:trunc(3, 4).
3.0
#!/usr/bin/env escriptI have inputs in a file
%hr.erl
r(L) ->
case io:fread("", "~d") of
eof ->
io:format("Reverse List: ~p~n", [L]),
ok;
{ok, [N]} ->
r([N|L])
end.
main(_) -> r([]).
in.txt.4To pass it the Erlang program we can use the pipe
5
6
0
1
2
| operator with cat.cat in.txt | escript hr.erlThis will produce the output
Reverse List: [2,1,0,6,5,4]It is a normal practice to use the redirection operator
< to send input as stdin taken from a file. But for some reasons, it's not working as intended with Erlang programs. The above program does not terminate if used with the redirection operator. It's the same case when using the command erl -noshell -s hr main < in.txt with exported module and function main/0. Of course, Erlang is not meant to be used like this. But still, it would be nice if we could. So finally pipe to the rescue. Instead of redirection, use pipe to send in input, which works correctly.perms([]) -> [[]];Let's say it's in a module named test. Compile and load it. Call it will the list [1,2,3].
perms(L) -> [[H|T] || H <- L, T <- perms(L -- [H])].
1> test:perms([1,2,3]).To understand this let us look at list comprehension. Single generators are straight forward.
[[1,2,3],[1,3,2],[2,1,3],[2,3,1],[3,1,2],[3,2,1]]
2> [X || X <- lists:seq(1, 5)].Read it as, X such that X is generated from a list with sequence 1 to 5. Let us consider list comprehension with multiple generators.
[1,2,3,4,5]
3> [{X, Y} || X <- [1,2,3], Y <- [10,11,12]].
[{1,10},
{1,11},
{1,12},
{2,10},
{2,11},
{2,12},
{3,10},
{3,11},
{3,12}]
Here we are constructing a tuple {X, Y} such that X is generated from list [1,2,3] and Y is generated from the list [10,11,12]. We can see the pairing from the generated list of tuples. It takes the first element from the first list and combines it with each individual element from the second list, then takes the second element from the first list and combines with all elements from the second list and so on recursively. Constructing a list. A non-empty list has a head and a tail. So we can represent a list as [H|T]. 4> hd([1]).Let's write down the reduction steps.
1
5> tl([1]).
[]
6> [ 1 | [] ].
[1]
7> [ 1 | [2,3] ].
[1,2,3]
8> [H|T] = [1,2,3].
[1,2,3]
9> H.
1
10> T.
[2,3]
perms([]) = [ [] ].
perms([1]) = [ 1 | [] ]
= [ [1] ].
perms([1,2])Combining both we get,
% produce a list with head as 1 and tail generated from the list obtained from
% the permutation of the original list without the current head.
= [ [1|T] || T <- perms([2]) ]
= [ [1|[2]] ]
= [ [1, 2] ]
% produce a list with head as 2 and tail generated from the list obtained from
% the permutation of the original list without the current head.
= [ [2|T] || T <- perms([1]) ]
= [ [2|[1]] ]
= [ [2, 1] ]
perms([1,2]) = [ [[1|T] || T <- perms([2])],
[[2|T] || T <- perms([1])] ].
= [ [[1|T] || T <- [[2]]],
[[2|T] || T <- [[1]]] ].
= [ [1|[2]],
[2|[1]] ].
= [ [1,2], [2,1] ].
perms([1,2,3]) = [ [[1|T] || T <- perms([2,3])],
[[2|T] || T <- perms([1,3])],
[[3|T] || T <- perms([1,2])] ].
= [ [[1|T] || T <- [[2,3], [3,2]]],
[[2|T] || T <- [[1,3], [3,1]]],
[[3|T] || T <- [[1,2], [2,1]]] ].
= [ [1|[2,3]], [1|[3,2]],
[2|[1,3]], [2|[3,1]],
[3|[1,2]], [3|[2,1]] ].
= [ [1,2,3], [1,3,2],
[2,1,3], [2,3,1],
[3,1,2], [3,2,1] ].
1> lists:seq(1, 5).An anonymous function that returns the double. This as such does nothing.
[1,2,3,4,5]
2> fun(X) -> 2*X end.An anonymous function which returns a function which when called returns the double.
#Fun<erl_eval.6.82930912>
3> fun(X) -> (fun() -> 2*X end) end.We can also write this without brackets
#Fun<erl_eval.6.82930912>
4> fun(X) -> fun() -> 2*X end end.Call the above function for each element in the list. We will use map for that. Let's assign the resultant list to a variable L.
#Fun<erl_eval.6.82930912>
5> L = lists:map(fun(X) -> (fun() -> 2*X end) end, lists:seq(1, 5)).We know the function returns another function and results are not evaluated until we call the returned function.
[#Fun<erl_eval.20.82930912>,#Fun<erl_eval.20.82930912>,
#Fun<erl_eval.20.82930912>,#Fun<erl_eval.20.82930912>,
#Fun<erl_eval.20.82930912>]
6> lists:nth(3, L).But I want to get the computed result. So I have to call the returned function. Now this is where it get slightly tricky. We can call the returned function by assigning it to a variable and calling it or call it directly.
#Fun<erl_eval.20.82930912>
7> F = lists:nth(3, L).To call the returned function directly, we have to wrap the whole expression in parenthesis and then call.
8> F().
6
9> (lists:nth(3, L))().We cannot call it like
6
lists:nth(3, L)() which will produce an error 1: syntax error before: '(. It is due to the precedence rules in the Erlang grammar.10> fun(X) -> 2*X end (3).In this case, it works with parenthesis as well.
6
11> (fun(X) -> 2*X end)(2).
4
rootPS: Check if rootfs has enough space before the installation.
apt-get install erlang
df -h /
df -h
redirect and later forward (to avoid additional requests from the client) method from grails. But I keep getting this error even though the params to the methods are all correct.Message: No signature of method: com.rwi.springsecurity.filters.CustomSessionExpiryFilter.forward() is applicableThen it struck, maybe by default we cannot use those grails methods in the spring security classes as they are under
for argument types: (java.util.LinkedHashMap) values: [[controller:exampleApi, action:init, params:[...]]]
src/groovy and also the doc mentions that the method is to forward from one action to another. So in this case, to forward a request we can use methods from the servlet classes.api is the controller and init is the action which includes query string as well.request.getRequestDispatcher("/api/init").forward(request, response)For a redirect request we can use response.sendRedirect() method with uri containing the necessary params like query strings appended manually. An example code snippet follows.// Construct the redirect uriVoilà!
String responseUri = {
String uri = request.forwardURI
String qs = request.getQueryString()
return (qs?.size() > 0) ? "${uri}?${qs}" : uri
}()
response.sendRedirect(responseUri)
call() method is executed depending on the type of parameter used, and the results vary accordingly, which can be better demonstrated using examples.import groovy.json.JsonBuilder
long userId = 12
def json = new JsonBuilder()
def result = json { //args as block
userId userId
}
json.toString() // produces error
groovy.lang.MissingMethodException: No signature of method: java.lang.Integer.call() is applicable for argument types: (java.lang.Integer) values: [12] Possible solutions: wait(), any(), abs(), wait(long), wait(long, int), and(java.lang.Number)call() method of the JsonBuilder class gives us the correct result. As we can see the above method uses a block, which can be used if the name of keys are different from any variable names in the scope.long userId = 12It is better to use as a map instead of a block (closure), which gives the intended result in most of the cases.
long abc = 123
long z = 987
def json = new JsonBuilder()
json userId: userId, //args as map
abc: abc,
z: z
json.toString() //{"userId":12,"abc",123,"z": 987}
var a = 1Below are examples where key contains the value in the variable.
JSON.stringify({a: a}) //"{"a": 1}"
//Groovy
json "${userId}": userId, z: z
json.toString() //{"12":12,"z",987}
//JavaScript
var a = 1, j = {}
j[a] = a
JSON.stringify(a) //"{"1":1}"
def a = [1, 2, 3, 4, 5, 6, 7, 8, 9]
a.take(3) // [1, 2, 3]
groovyfx.jar and jfxrt.jar added to the classpath. The JDK I am using is v1.8.0-ea. JavaFX SDK is bundled with JDK from Java 7u4 and above.org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:The above error is thrown if
Intro.groovy: 3: unable to resolve class groovyx.javafx.GroovyFX
@ line 3, column 1.
import groovyx.javafx.GroovyFX
^
1 error
groovyfx.jar is not found. The easiest way to fix this would be to use Grapes and annotate the source with @Grab('org.codehaus.groovyfx:groovyfx:0.3.1'), which will download and add the groovyfx-0.3.1.jar in the .groovy directory. Another way would be to download it from maven repository and add it to classpath manually (or use mvn). CLASSPATH with value .;F:\javaLibs\groovyfx-0.3.1.jar; (update the path F:\javaLibs to reflect your directory preferences). In Windows the delimiter is ; where as under GNU/Linux it is :. This example uses Windows. There is a dot at the beginning so that the current working directory is also included. If the variable already exists, just append it to the end preceeding the appropriate delimiter.Caught: java.lang.NoClassDefFoundError: javafx/application/ApplicationThe above error is caused because Groovy could not find the jfxrt.jar file in the classpath. To resolve this append
java.lang.NoClassDefFoundError: javafx/application/Application
Caused by: java.lang.ClassNotFoundException: javafx.application.Application
%JAVA_HOME%\jre\lib\jfxrt.jar; to the classpath variable.CLASSPATH should look like.;F:\javaLibs\groovyfx-0.3.1.jar;%JAVA_HOME%\jre\lib\jfxrt.jar;These are the two main errors that gets between running GroovyFX programs. Let us run a sample program from the groovyfx.org website.
// Hello.groovyRun it as
import groovyx.javafx.GroovyFX
GroovyFX.start {
stage(title: "GroovyFX Hello World", visible: true) {
scene(fill: BLACK, width: 500, height: 250) {
hbox(padding: 60) {
text(text: "Groovy", font: "80pt sanserif") {
fill linearGradient(endX: 0, stops: [PALEGREEN, SEAGREEN])
}
text(text: "FX", font: "80pt sanserif") {
fill linearGradient(endX: 0, stops: [CYAN, DODGERBLUE])
effect dropShadow(color: DODGERBLUE, radius: 25, spread: 0.25)
}
}
}
}
}
groovy Hello.groovyor compile and run as
groovyc Hello.groovywill give the output as shown below.
groovy Hello
<div class="root">
<div>A</div>
<div>B</div>
<div>C</div>
<div>D</div>
<div>E</div>
<div>F</div>
<div>G</div>
</div>
// Using jQueryjsFiddle demo (uses jQuery).
$(document).ready(function () {
$('.root').on('click', function (e) {
alert(e.target.innerHTML);
// depending on e.target we can call necessary function (delegation)..
});
});
//Using DOM APIsjsFiddle demo (uses DOM APIs).
var el = document.getElementsByClassName('root');
el[0].addEventListener('click', function(e) {
alert(e.target.innerHTML);
});
rsync -zvr -e 'ssh -p 2222' sourceDir user@ip:/home/user/dir
-z compress-v verbose-r recusive-e remote shell, -p can be used if ssh runs on a different port.osascript -e 'tell app "Finder" to display dialog "Hi! From OS X. Steve Jobs is watching you."'Since we can do this using a terminal, with a bit of creativity we can have pranks. :D
sudo gainroot4. Start the ssh server
passwd user #user is the username of the default account
#enter your password when prompted
/etc/init.d/ssh restart #in case if it's already runningAccess the phone remotely using ssh as
user@the-ip-of-the-phone. You can find the IP address using the ifconfig command.sudo port install vnstat2. Assuming the default interface to be monitored is en0, open the vnstat.conf file under /opt/local/etc/vnstat.conf and update the parts
# default interface3. Run the below command which will start monitoring en0
Interface "en0"
# location of the database directory
DatabaseDir "/opt/local/var/db/vnstat"
sudo vnstat -u -i en04. Now to run this as a service so that it starts up automatically at boot we can create a user daemon. In case of GNU/Linux, such scripts are present in /etc/init.d where as in OS X it's in /Library/LaunchDaemons.
sudo vim /Library/LaunchDaemons/local.vnstat.plistUse the file content for local.vnstat.plist file as given below
<?xml version="1.0" encoding="UTF-8"?>5. Change owner and group to root and wheel respectively.
<!DOCTYPE plist PUBLIC "-//Apple/DTD PLIST 1.0//EN"
"http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>local.vnstat</string>
<key>ProgramArguments</key>
<array>
<string>/opt/local/bin/vnstat</string>
<string>-u</string>
</array>
<key>StartInterval</key>
<integer>300</integer>
</dict>
</plist>
sudo chown root:wheel /Library/LaunchDaemons/local.vnstat.plist6. Use lauchctl to start the daemon
sudo launchctl load /Library/LaunchDaemons/local.vnstat.plistTo stop the daemon use unload.
sudo launchctl unload /Library/LaunchDaemons/local.vnstat.plistCheck the usage with
vnstat #lists complete usageThe 'estimated' data given is a prediction that vnstat calculates in realtime looking at the usage, hours etc.
vnstat -d #lists daily usage
sudo launchctl list | grep vnstat
/opt. After installation add /opt/node/bin to the path (/etc/profile).lua, luac goes to /usr/local/bin/ and liblua.a goes to /usr/local/lib.wget "http://example.com" -e use_proxy=yes -e http_proxy=127.0.0.1:8118
ffmpeg -i video.mp4 -ac 2 -ar 44100 -vn audio.mp3
-i specify input file-ac audio channels-ar audio rate which is the sampling rate per second-vn video none to not output video data-ab audio bitrate for constant bitrate. -ab 320k means a bit rate of 320 kBit/sec.-ab will produce audio file with constant bit rate (CBR). Leaving it out will give audio with variable bit rate (VBR). I recommend using VBR for better quality to size ratio. root #needs to be root
apt-get install lua5.1
string does not contain commonly used methods like split. However, the module string_ext contains them. Below is a snippet on how to use the split method. The point to consider here is the module we have to import in order for the method to work correctly. Importing only the string_ext module is not enough. We have to import list and strbuf modules as well.require("string_ext")
require("list")
require("strbuf")
print(string.split("Hello World", " ")) -- outputs {1=Hello,2=World}
rest. To install the plugin go to the grails project directory and rungrails install-plugin rest1. Run the grails application with HTTPS.
keytool -importcert -alias "subdomain.your-website-domain.com" -file localhost.crt -keystore truststore.jks -storepass password12344. Copy the truststore.jks file created in step 3 to
grails-app/conf folder.//RestConnector.groovy6. Using the above class in a grails controller:
import grails.converters.JSON
import groovyx.net.http.HTTPBuilder
import groovyx.net.http.ContentType
import groovyx.net.http.Method
import org.apache.http.impl.client.DefaultRedirectStrategy
import org.apache.http.impl.cookie.BasicClientCookie
import java.security.KeyStore
import org.apache.http.conn.scheme.Scheme
import org.apache.http.conn.ssl.SSLSocketFactory
import org.apache.http.HttpRequest
import org.apache.http.HttpResponse
import org.apache.http.protocol.HttpContext
import javax.servlet.http.HttpServletResponse
import javax.servlet.http.Cookie
import groovyx.net.http.Method
import groovyx.net.http.ContentType
import groovyx.net.http.HTTPBuilder
import groovyx.net.http.HttpResponseDecorator
class RestConnector {
private String baseUrl
private HTTPBuilder httpBuilder
private List<string> cookies
private KeyStore keyStore
RestConnector(String url) {
this.baseUrl = url
this.httpBuilder = initializeHttpBuilder()
this.cookies = []
}
public def request(Method method, ContentType contentType, String url, Map<String, Serializable> params) {
debug("Send $method request to ${this.baseUrl}$url: $params")
// import the key from the keystore if not done already
if (keyStore == null) {
keyStore = KeyStore.getInstance(KeyStore.defaultType)
getClass().getResource( "/truststore.jks").withInputStream {
keyStore.load(it, "password1234".toCharArray())
}
}
SSLSocketFactory sf = new SSLSocketFactory(keyStore)
sf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER)
httpBuilder.client.connectionManager.schemeRegistry.register(new Scheme("https", sf, 443))
httpBuilder.request(method, contentType) { request ->
uri.path = url
//uri.query = params
headers['Cookie'] = cookies.join(';')
requestContentType = ContentType.URLENC
// sample params
body = ['username': "${params.username}", 'password': "${params.password}", 'otherParams': "${params.otherExampleParams}"]
headers.'Connection' = params['Connection']
headers.'Cookie' = params['Cookie']
println("::Cookie: -> " + params['Cookie'])
headers.'Host' = params['Host']
headers.'X-Requested-With' = params['X-Requested-With']
headers.'Origin' = params['Origin']
}
}
private HTTPBuilder initializeHttpBuilder() {
def httpBuilder = new HTTPBuilder(baseUrl)
httpBuilder.handler.success = { HttpResponseDecorator resp, reader ->
resp.getHeaders('Set-Cookie').each {
//[Set-Cookie: JSESSIONID=E68D4799D4D6282F0348FDB7E8B88AE9; Path=/frontoffice/; HttpOnly]
String cookie = it.value.split(';')[0]
debug("Adding cookie to collection: $cookie")
cookies.add(cookie)
}
if (resp.status == 302) {
println('302 detected')
return ['status': 'redirect', 'response': resp]
}
debug("Resp: ${resp}")
debug("Reader: ${reader}")
return ['status': 'ok', 'result': reader]
}
// Enable to follow redirect requests
/*httpBuilder.client.setRedirectStrategy(new DefaultRedirectStrategy() {
@Override
boolean isRedirected(HttpRequest request, HttpResponse response, HttpContext context) {
def redirected = super.isRedirected(request, response, context)
return redirected || response.getStatusLine().getStatusCode() == 302
}
})*/
return httpBuilder
}
private debug(String message) {
System.out.println(message) //for Gradle
}
}
//ExampleController.groovy
// ..imports
class ExampleController {
def index() {
String serverName = request.getServerName()
String serverUrl = "https://${serverName}"
RestConnector restConnector = new RestConnector(serverUrl) //some https url here
def result = restConnector.request(Method.POST, ContentType.JSON, "${serverUrl}", ['username': "${username}", 'password': "${password}", 'otherParam': "${otherParam}"])
if (result.status == "redirect") {
def resp = result.response
def heads = resp.getHeaders()
redirect(uri: 'redirect-uri-here')
} else if (result.status == "ok") {
render (result.result as JSON)
}
}
}
// IIFE in jsIn Groovy the same thing can be done using anonymous blocks which the language names as 'closure'. It is not the lexical closure that we are talking about, though it can be. The 'Closure' in Groovy is just a block of code.
(function(arg) {
if (arg === 1)
return "one";
else
return "not one";
})(1);
// IIFE in Groovy
{arg ->
if (arg == 1)
"one"
else
"not one"
}(1)
Bookmarks Organizer Google Chrome Extension helps us in keeping the bookmarks sorted. By default Chrome does not sort bookmarks by title. This extension monitors for newly added or moved bookmarks and auto arranges them in ascending order by title. There is a reorder button to manually order the whole bookmark, which can be used initially after installation. The only down side is that there is API restriction on the number of bookmarks that can be reordered (moved) per min, per hour and the number is a bit low.cp command does not have an excludes option. One way to copy files ignores some files or directories is to create a tarball. The tar command has an exclude option. The exclude patterns can be mentioned in a separate file and passed in to the tar command.# Directory StructureIn the above directory structure, I want to copy certain file to bin/BO but ignore others like .git, fla files in the res/icons directory, the build scripts etc. For that first create an file say buildExcludes with the exclude pattern.
BO
│ .git
│ .gitignore
│ books.html
│ book.js
│ build.sh
│ buildExcludes
│ main.js
│ manifest.json
│
├───bin
│ └───BO
│ │ books.html
│ │ books.js
│ │ main.js
│ │ manifest.json
│ │
│ └───res
│ └───icons
│ bo-128.png
│ bo-16.png
│ bo-256.png
│ bo-32.png
│ bo-48.png
│ bo-512.png
│ bo-64.png
│
└───res
└───icons
bo-128.png
bo-16.png
bo-256.png
bo-32.png
bo-48.png
bo-512.png
bo-64.png
bo.fla
.gitCreate the tar, deflate to the destination directory and delete the tar once done.
.gitignore
bin
res/icons/*.fla
build.sh
buildExcludes
tar -cvf bo.tar * -X buildExcludes #create tar
tar -xvf bo.tar -C bin/BO/ #deflate to destination directory
rm -f bo.tar #cleanup
// Snippet for getting timestamp in milliseconds for the present day with time taken as 00:00:00
// Eg: ts for '2013-02-19'
public long getTsForToday() {
Calendar cal = Calendar.getInstance();
int year = cal.get(cal.YEAR);
int month = cal.get(cal.MONTH);
int date = cal.get(cal.DATE);
cal.clear();
cal.set(Calendar.YEAR, year);
cal.set(Calendar.MONTH, month);
cal.set(Calendar.DATE, date);
return cal.getTimeInMillis();
}
src/groovy folder does not have dependency injection by default. However we can can access service classes using servlet context.package com.example.ExampleClass
import org.codehaus.groovy.grails.web.context.ServletContextHolder
import org.codehaus.groovy.grails.web.servlet.GrailsApplicationAttributes
class ExampleClass {
def context = ServletContextHolder.servletContext.getAttribute(GrailsApplicationAttributes.APPLICATION_CONTEXT)
def exampleService = context.exampleService
}