Wednesday, 10 June 2015

How to draw an html table with diagonal lines and diagonal text?

The main building blocks are:
  • A nicely marked up <table>
  • A pseudo element border with skew to get the basic shape
  • A rotate on the span that contains the header text.
The concept is pretty basic, the pseudo elements and spans are positioned using position: absolute and they are positioned relative to their parent <th> headers which have position: relative
Here is the example!
Here is what it looks like in Chrome / Firefox / IE10+. IE 8 - 9 should work with their proprietary filters.
Screenshot
Here is the HTML / CSS:
* {
    margin: 0;
    padding: 0;
}

body {
    background: #FFF;
}
table {
    border-collapse: collapse;
    margin: 50px 0 0 50px;
    border-top: solid 1px #000;
    position: relative;
}

/* Very top border */
 table:before {
    content:'';
    display: block;
    position: absolute;
    top: -20px;
    left: 120px;
    height: 20px;
    width: 240px;
    border: solid 1px #000;
    border-bottom: none;
}

/* Far right headers top border (it's outside the table) */
 table:after {
    content:'';
    display: block;
    position: absolute;
    border-top: solid 1px #000;
    width: 101px;
    right: -101px;
    top: 0;
}

/* 
     - Apply header background/font colour 
     - Set base z-index for IE 9 - 10
*/
 thead, th:before {
    background: #03a9f4;
    color: #FFF;
    z-index: 1;
}

/* min-width and max-width together act like a width */
 th {
    min-width: 60px;
    max-width: 60px;
    position: relative;
    height: 100px;
}

/* Pseudo element borders */
 th:before {
    content:'';
    display: block;
    position: absolute;
    top: 0;
    right: -50px;
    height: 100px;
    width: 60px;
    border: solid 1px #000;
    border-right: none;
    border-top: none;
    transform: skew(-45deg);
    border-bottom: none;
}

/* Apply the right border only to the last pseudo element */
 thead th:last-child:before {
    border-right: solid 1px #000;
}

/* Apply the top border only to the first rows cells */
 tbody tr:first-child td {
    border-top: solid 1px #000;
}

/* 
     - Rotate and position headings
     - Padding centers the text vertically and does the job of height
     - z-index ensures that the text appears over the background color in IE 9 - 10
*/
 th span {
    transform: rotate(-45deg);
    display: inline-block;
    vertical-align: middle;
    position: absolute;
    right: -70px;
    bottom: 29px;
    height: 0;
    padding: 0.75em 0 1.85em;
    width: 100px;
    z-index: 2;
}

/* Create first two th styles */
 th:nth-child(1), th:nth-child(2) {
    border: solid 1px #000;
    border-top: none;
    border-bottom: none;
}
th:nth-child(2) {
    border-right: none;
}
th:nth-child(1):before, th:nth-child(2):before {
    display: none;
}

td {
    border: solid 1px #000;
    border-bottom: none;
    border-top: none;
    height: 20px;
    text-align: center;
}
tfoot {
    border: solid 1px #000;
}
 
HTML Code :  
 
<table>
    <thead>
        <tr>
            <th>One</th>
            <th>Two</th>
            <th><span>Three</span></th>
            <th><span>Four</span></th>
            <th><span>Five</span></th>
            <th><span>Six</span></th>
            <th><span>Seven</span></th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>0</td>
            <td>0</td>
            <td>0</td>
            <td>0</td>
            <td>0</td>
            <td>0</td>
            <td>0</td>
        </tr>
    </tbody>
    <tfoot>
        <tr>
            <td>0</td>
            <td>0</td>
            <td>0</td>
            <td>0</td>
            <td>0</td>
            <td>0</td>
            <td>0</td>
        </tr>
    </tfoot>
</table>

Create diagonal border of a cell






HTML :

<div id="square">
      <span id="room">ROOM TYPE</span>
       <span id="hosp">HOSPITALITY</span></div>
<div id="line"></div>


CSS :

#square {
    position: absolute;
    top: 100px;
    left: 100px;
    background: #3b2a32;
    border: 2px solid #ad1b59;
    color: #ad1b59;
    height: 200px;
    width: 400px;
    font-family: arial, verdana;
    font-size: 22px;
    font-weight: bolder;
}

#room {
    display: block;
    position: absolute;
    top: 50px;
    left: 220px;
}

#hosp {
    display: block;
    position: absolute;
    top: 140px;
    left: 50px;
}


#line {
    position: absolute;
    top: 190px;
    left: 33px;
    height: 200px;
    width: 450px;
    border-top: 2px solid #ad1b59;   
    -webkit-transform: rotate(26.5deg);
       -moz-transform: rotate(26.5deg);
        -ms-transform: rotate(26.5deg);
         -o-transform: rotate(26.5deg);
            transform: rotate(26.5deg);
}

Thursday, 4 June 2015

HashMap with multiple values under the same key


  1. Use a map that has a list as the value. Map<KeyType, List<ValueType>>.
  2. Create a new wrapper class and place instances of this wrapper in the map. Map<KeyType, WrapperType>.
  3. Use a tuple like class (saves creating lots of wrappers). Map<KeyType, Tuple<Value1Type, Value2Type>>.
  4. Use mulitple maps side-by-side.

Examples

1. Map with list as the value
// create our map
Map<string, List<Person>> peopleByForename = new HashMap<string, List<Person>>();    

// populate it
List<Person> people = new ArrayList<Person>();
people.Add(new Person("Bob Smith"));
people.Add(new Person("Bob Jones"));
peopleByForename.Add("Bob", people);

// read from it
List<Person> bobs = peopleByForename["Bob"];
Person bob1 = bobs[0];
Person bob2 = bobs[1];
2. Using wrapper class
// define our wrapper
class Wrapper {
    public Wrapper(Person person1, Person person2) {
       this.person1 = person1;
       this.person2 = person2;
    }

    public Person getPerson1 { return this.person1; }
    public Person getPerson2 { return this.person2; }

    private Person person1;
    private Person person2;
}

// create our map
Map<string, Wrapper> peopleByForename = new HashMap<string, Wrapper>();

// populate it
Wrapper people = new Wrapper()
peopleByForename.Add("Bob", new Wrapper(new Person("Bob Smith"),
                                        new Person("Bob Jones"));

// read from it
Wrapper bobs = peopleByForename["Bob"];
Person bob1 = bobs.Person1;
Person bob2 = bobs.Person2;
3. Using a tuple
// you'll have to write or download a Tuple class in Java, (.NET ships with one)

// create our map
Map<string, Tuple2<Person, Person> peopleByForename = new HashMap<string, Tuple2<Person, Person>>();

// populate it
peopleByForename.Add("Bob", new Tuple2(new Person("Bob Smith",
                                       new Person("Bob Jones"));

// read from it
Tuple<Person, Person> bobs = peopleByForename["Bob"];
Person bob1 = bobs.Item1;
Person bob2 = bobs.Item2;
4. Multiple maps
// create our maps
Map<string, Person> firstPersonByForename = new HashMap<string, Person>();
Map<string, Person> secondPersonByForename = new HashMap<string, Person>();

// populate them
firstPersonByForename.Add("Bob", new Person("Bob Smith"));
secondPersonByForename.Add("Bob", new Person("Bob Jones"));

// read from them
Person bob1 = firstPersonByForename["Bob"];
Person bob2 = secondPersonByForename["Bob"];

Underscore JS


JS File : underscore.js

Underscore is a JavaScript library that provides a whole mess of useful functional programming helpers without extending any built-in objects. It’s the answer to the question: “If I sit down in front of a blank HTML page, and want to start being productive immediately, what do I need?” … and the tie to go along with jQuery's tux and Backbone's suspenders.


Usage :

var groupedData = _.groupBy(data, function(d){return d.division});
console.log(groupedData);


var data = [{
    "division": "East",
    "rm_name": "Russ Martin",
    "address": "MT,VT, NH, ME  (all firms)",
    "state": "MT",
    "coordinates": "43.299428,-74.217933"
}, {
    "division": "East",
    "rm_name": "Carey Fischer",
    "address": "NY- Upstate ex Rockland County (BD, FP)",
    "state": "NY",
    "coordinates": "46.879682,-110.362566"
}, {
    "division": "East",
    "rm_name": "Brandon Born",
    "address": "CT, NY - Upstate, MA - ex metro Boston (FI), MA - Central, West (all firms)",
    "state": "CT",
    "coordinates": "40.714353,-74.005973"
}, {
    "division": "East",
    "rm_name": "Joe Tocyloski",
    "address": "PA - East, NJ - South (FP)",
    "state": "PA",
    "coordinates": "41.603221,-73.087749"
}, {
    "division": "East",
    "rm_name": "Phil Hemery",
    "address": "NJ (FI), NJ - Bergen County (all firms), NY - NYC (FI,RIA)/Westchester (FI,BD)/Rockland County (all firms)",
    "state": "NJ",
    "coordinates": "41.203456,-77.189941"
}, {
    "division": "East",
    "rm_name": "Bob Mancini",
    "address": "MA - East (all firms)",
    "state": "MA",
    "coordinates": "42.407235,-71.383667"
}, {
    "division": "East",
    "rm_name": "Damien Ramondo",
    "address": "NJ, PA East",
    "state": "NJ",
    "coordinates": "41.203456,-77.189941"
}, {
    "division": "East",
    "rm_name": "Kevin Gang",
    "address": "W VA,PA - West (all firms), OH - Cleveland (BD, FI)",
    "state": "VA",
    "coordinates": "44.314844,-85.602364"
}, {
    "division": "East",
    "rm_name": "Andrew Fischer",
    "address": "MI - (all firms)",
    "state": "MI",
    "coordinates": "40.057052,-74.404907"
}, {
    "division": "East",
    "rm_name": "David Saslowsky",
    "address": "NYC",
    "state": "NY",
    "coordinates": "46.879682,-110.362566"
}, {
    "division": "East",
    "rm_name": "Robert Brazofsky",
    "address": "NYC",
    "state": "NY",
    "coordinates": "46.879682,-110.362566"
}, {
    "division": "East",
    "rm_name": "Joseph Proscia",
    "address": "NJ - North ex Bergen County, NY - NYC (FP)",
    "state": "NJ",
    "coordinates": "41.203456,-77.189941"
}, {
    "division": "East",
    "rm_name": "William Marsalise",
    "address": "NY - LI and Outer Boroughs (FI), LI Planners",
    "state": "NY",
    "coordinates": "46.879682,-110.362566"
}, {
    "division": "East",
    "rm_name": "Dan Stack",
    "address": "OH - Columbus and South (all firms), KY - Covington (all firms)",
    "state": "OH",
    "coordinates": "37.439974,-78.662109"
}, {
    "division": "East",
    "rm_name": "James Broderick",
    "address": "OH - North of Columbus ex Cleveland (all firms), Cleveland (FP)",
    "state": "OH",
    "coordinates": "37.439974,-78.662109"
}, {
    "division": "South",
    "rm_name": "Chris Carrelha",
    "address": "FL - North (FP)",
    "state": "FL",
    "coordinates": "40.417287,-82.907123"
}, {
    "division": "South",
    "rm_name": "Don Connell",
    "address": "TN, AR, KY - ex Covington (all firms), MO - St. Louis (by firm)",
    "state": "TN",
    "coordinates": "27.664827,-81.515754"
}, {
    "division": "South",
    "rm_name": "Jay O'Connor",
    "address": "NC - ex coast, SC, GA - Savannah to Augusta (all firms)",
    "state": "NC",
    "coordinates": "35.517491,-86.580447"
}, {
    "division": "South",
    "rm_name": "Dwight Cornell",
    "address": "FL - South, VI, PR (all firms)",
    "state": "FL",
    "coordinates": "40.417287,-82.907123"
}, {
    "division": "South",
    "rm_name": "Eric Indovina",
    "address": "AL (all firms), GA (BD, RIA)",
    "state": "AL",
    "coordinates": "14.97198,19.753418"
}, {
    "division": "South",
    "rm_name": "Russ Corby",
    "address": "TX - DFW (BD, FP) Houston Austin and San Antonio (FP, FI)",
    "state": "TX",
    "coordinates": "32.318231,-86.902298"
}, {
    "division": "South",
    "rm_name": "Chris Boeker",
    "address": "TX - Southeast (BD), MS, LA - South (all firms)",
    "state": "TX",
    "coordinates": "32.318231,-86.902298"
}, {
    "division": "South",
    "rm_name": "Robert Nelms",
    "address": "VA - ex DC metro (all firms), NC - Coast, MD (ex Baltimore), VA, DC (FI), TN - northeastern corner (all firms)",
    "state": "VA",
    "coordinates": "44.314844,-85.602364"
}, {
    "division": "South",
    "rm_name": "Joe Dominguez",
    "address": "FL - North (BD, FI)",
    "state": "FL",
    "coordinates": "40.417287,-82.907123"
}, {
    "division": "South",
    "rm_name": "Marc Della Pia",
    "address": "MD, DC - Metro, VA - Alexandria  (BD, FA), Baltimore (FI)",
    "state": "MD",
    "coordinates": "31.968599,-99.901813"
}, {
    "division": "South",
    "rm_name": "Chris Carrelha",
    "address": "GA (FI, FP)",
    "state": "GA",
    "coordinates": "32.166313,-82.902832"
}, {
    "division": "South",
    "rm_name": "Terry Harris",
    "address": "OK, TX - by city (all firms)",
    "state": "OK",
    "coordinates": "32.166313,-82.902832"
}, {
    "division": "West",
    "rm_name": "Arend Elston",
    "address": "AR, MO, IL - South(all firms)",
    "state": "AR",
    "coordinates": "35.007752,-97.092877"
}, {
    "division": "West",
    "rm_name": "John Schmidt",
    "address": "IL - Chicago Metro (BD)",
    "state": "IL",
    "coordinates": "35.20105,-91.831833"
}, {
    "division": "West",
    "rm_name": "Jason Stevens",
    "address": "MN, ND (All Firms)",
    "state": "MN",
    "coordinates": "46.7248,-94.680176"
}, {
    "division": "West",
    "rm_name": "Laura Channell",
    "address": "IL - Chicago Metro (FI, FP)",
    "state": "IL",
    "coordinates": "35.20105,-91.831833"
}, {
    "division": "West",
    "rm_name": "Patrick Denis",
    "address": "WI (all firms), Upper Peninsula of Michigan",
    "state": "WI",
    "coordinates": "46.729553,-94.6859"
}, {
    "division": "West",
    "rm_name": "Michael Cheskis",
    "address": "IN (all firms), IL - Chicago Metro (By Firm)",
    "state": "IN",
    "coordinates": "43.78444,-88.787868"
}, {
    "division": "West",
    "rm_name": "Dave Mitchell",
    "address": "IA, KS, NE, SD, MO - Kansas City (all firms)",
    "state": "IA",
    "coordinates": "40.271144,-86.132812"
}, {
    "division": "West",
    "rm_name": "Paul Moyer",
    "address": "WA, ID, OR (all firms)",
    "state": "WA",
    "coordinates": "41.877741,-93.098145"
}, {
    "division": "West",
    "rm_name": "Peter Szabo",
    "address": "AK, NV - Reno (all firms), N. CA (BD & FI), San Francisco (FI)",
    "state": "AK",
    "coordinates": "47.751074,-120.740139"
}, {
    "division": "West",
    "rm_name": "Lou Tousignant",
    "address": "N.CA (FP), San Francisco (BD & FP)",
    "state": "CA",
    "coordinates": "64.200841,-149.493673"
}, {
    "division": "West",
    "rm_name": "Matt Malvey",
    "address": "CA - San Diego (all firms)",
    "state": "CA",
    "coordinates": "64.200841,-149.493673"
}, {
    "division": "West",
    "rm_name": "Kevin Dausch",
    "address": "N. CA (BD & FI), San Francisco (FI)",
    "state": "CA",
    "coordinates": "64.200841,-149.493673"
}, {
    "division": "West",
    "rm_name": "Scott Hutton",
    "address": "CO, NM, WY, MT (all firms)",
    "state": "Colorado",
    "coordinates": "40.747164,-74.000566"
}, {
    "division": "West",
    "rm_name": "Brian Buehring",
    "address": "CA - North LA to Santa Barbara, HI (all firms)",
    "state": "CA",
    "coordinates": "64.200841,-149.493673"
}, {
    "division": "West",
    "rm_name": "Robert Forrester",
    "address": "CA - Orange County to San Diego (all firms)",
    "state": "CA",
    "coordinates": "64.200841,-149.493673"
}, {
    "division": "West",
    "rm_name": "Mike Ossmen",
    "address": "CA - Downtown LA, Pasadena, South Bay & Inland Empire (All Firms)",
    "state": "CA",
    "coordinates": "64.200841,-149.493673"
}];

ng-mouseover and leave to toggle item using mouse in angularjs

HTML Code :

<div ng-controller="Ctrl">
    <ul ng-repeat="task in tasks">
        <li ng-mouseover="enableEdit(task)" ng-mouseleave="disableEdit(task)">{{task.name}}
              <span ng-show="task.editable"><a>Edit</a></span>
        </li>
    </ul>
</div>


JS  Funtion :

(function () {
    angular.element(document).ready(function () {
        var app = angular.module('myApp', []);

        app.controller("Ctrl", function ($scope) {
            $scope.tasks = [{
                name: 'foo'
            }, {
                name: 'bar'
            }];

            $scope.enableEdit = function (item) {
                item.editable = true;
            };

            $scope.disableEdit = function (item) {
                item.editable = false;
            };
        });

        angular.bootstrap(document, ['myApp']);
    });


}());

Evaluating a math expression given in string form

With JDK1.6, you can use the built-in Javascript engine.


The Java Scripting functionality is in the javax.script package. This is a relatively small, simple API. The starting point of the scripting API is the ScriptEngineManager class. A ScriptEngineManager object can discover script engines through the jar file service discovery mechanism. It can also instantiate ScriptEngine objects that interpret scripts written in a specific scripting language. The simplest way to use the scripting API is as follows:
  1. Create a ScriptEngineManager object.
  2. Get a ScriptEngine object from the manager.
  3. Evaluate script using the ScriptEngine's eval methods.

import javax.script.ScriptEngineManager;
import javax.script.ScriptEngine;

public class Test {
  public static void main(String[] args) throws Exception{
    ScriptEngineManager mgr = new ScriptEngineManager();
    ScriptEngine engine = mgr.getEngineByName("JavaScript");
    String foo = "40+2";
    System.out.println(engine.eval(foo));
    } 
}