Android: Create a toggle button with image and no text

I know this is a little late, however for anyone interested, I've created a custom component that is basically a toggle image button, the drawable can have states as well as the background

https://gist.github.com/akshaydashrath/9662072

Change "on" color of a Switch

Solution for Android Studio 3.6:

yourSwitch.setTextColor(getResources().getColor(R.color.yourColor));

Changes the text color of a in the color XML file defined value (yourColor).

Change the On/Off text of a toggle button Android

In the example you link to, they are changing it to Day/Night by using android:textOn and android:textOff

Toggle button using two image on different state

AkashG's solution don't work for me. When I set up check.xml to background it's just stratched in vertical direction. To solve this problem you should set up check.xml to "android:button" property:

<ToggleButton 
    android:id="@+id/toggle"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:button="@drawable/check"   //check.xml
    android:background="@null"/>

check.xml:

<?xml version="1.0" encoding="utf-8"?>
    <selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- When selected, use grey -->
    <item android:drawable="@drawable/selected_image"
          android:state_checked="true" />
    <!-- When not selected, use white-->
    <item android:drawable="@drawable/unselected_image"
          android:state_checked="false"/>
    </selector>

How to make a radio button look like a toggle button

I know this is an old question, but since I was just looking to do this, I thought I would post what I ended up with. Because I am using Bootstrap, I went with a Bootstrap option.

HTML

<div class="col-xs-12">
    <div class="form-group">
        <asp:HiddenField ID="hidType" runat="server" />
        <div class="btn-group" role="group" aria-label="Selection type" id="divType">
            <button type="button" class="btn btn-default BtnType" data-value="1">Food</button>                        
            <button type="button" class="btn btn-default BtnType" data-value="2">Drink</button>
        </div>
    </div>
</div>

jQuery

$(document).ready(function () {
    $('#divType button').click(function () {
        $(this).addClass('active').siblings().removeClass('active');
        $('#<%= hidType.ClientID%>').val($(this).data('value'));
        //alert($(this).data('value'));             
    });
});

I chose to store the value in a hidden field so that it would be easy for me to get the value server-side.

Example on ToggleButton

@Override
public void onClick(View v) {
    // TODO Auto-generated method stub
    editString = ed.getText().toString();
    if(editString.equals("1")){

        toggle.setTextOff("TOGGLE ON");
        toggle.setChecked(true);

    }
    else if(editString.equals("0")){

        toggle.setTextOn("TOGGLE OFF");
        toggle.setChecked(false);

    }
}

Sort table rows In Bootstrap

These examples are minified because StackOverflow has a maximum character limit and links to external code are discouraged since links can break.

There are multiple plugins if you look: Bootstrap Sortable, Bootstrap Table or DataTables.

Bootstrap 3 with DataTables Example: Bootstrap Docs & DataTables Docs

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$(document).ready(function() {
  $('#example').DataTable();
});

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<link href=https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css rel=stylesheet><link href=https://cdnjs.cloudflare.com/ajax/libs/datatables/1.10.20/css/dataTables.bootstrap.min.css rel=stylesheet><div class=container><h1>Bootstrap 3 DataTables</h1><table cellspacing=0 class="table table-bordered table-hover table-striped"id=example width=100%><thead><tr><th>Name<th>Position<th>Office<th>Salary<tbody><tr><td>Tiger Nixon<td>System Architect<td>Edinburgh<td>$320,800<tr><td>Garrett Winters<td>Accountant<td>Tokyo<td>$170,750<tr><td>Ashton Cox<td>Junior Technical Author<td>San Francisco<td>$86,000<tr><td>Cedric Kelly<td>Senior Javascript Developer<td>Edinburgh<td>$433,060<tr><td>Airi Satou<td>Accountant<td>Tokyo<td>$162,700<tr><td>Brielle Williamson<td>Integration Specialist<td>New York<td>$372,000<tr><td>Herrod Chandler<td>Sales Assistant<td>San Francisco<td>$137,500<tr><td>Rhona Davidson<td>Integration Specialist<td>Tokyo<td>$327,900<tr><td>Colleen Hurst<td>Javascript Developer<td>San Francisco<td>$205,500<tr><td>Sonya Frost<td>Software Engineer<td>Edinburgh<td>$103,600<tr><td>Jena Gaines<td>Office Manager<td>London<td>$90,560<tr><td>Quinn Flynn<td>Support Lead<td>Edinburgh<td>$342,000<tr><td>Charde Marshall<td>Regional Director<td>San Francisco<td>$470,600<tr><td>Haley Kennedy<td>Senior Marketing Designer<td>London<td>$313,500<tr><td>Tatyana Fitzpatrick<td>Regional Director<td>London<td>$385,750<tr><td>Michael Silva<td>Marketing Designer<td>London<td>$198,500<tr><td>Paul Byrd<td>Chief Financial Officer (CFO)<td>New York<td>$725,000<tr><td>Gloria Little<td>Systems Administrator<td>New York<td>$237,500<tr><td>Bradley Greer<td>Software Engineer<td>London<td>$132,000<tr><td>Dai Rios<td>Personnel Lead<td>Edinburgh<td>$217,500<tr><td>Jenette Caldwell<td>Development Lead<td>New York<td>$345,000<tr><td>Yuri Berry<td>Chief Marketing Officer (CMO)<td>New York<td>$675,000<tr><td>Caesar Vance<td>Pre-Sales Support<td>New York<td>$106,450<tr><td>Doris Wilder<td>Sales Assistant<td>Sidney<td>$85,600<tr><td>Angelica Ramos<td>Chief Executive Officer (CEO)<td>London<td>$1,200,000<tr><td>Gavin Joyce<td>Developer<td>Edinburgh<td>$92,575<tr><td>Jennifer Chang<td>Regional Director<td>Singapore<td>$357,650<tr><td>Brenden Wagner<td>Software Engineer<td>San Francisco<td>$206,850<tr><td>Fiona Green<td>Chief Operating Officer (COO)<td>San Francisco<td>$850,000<tr><td>Shou Itou<td>Regional Marketing<td>Tokyo<td>$163,000<tr><td>Michelle House<td>Integration Specialist<td>Sidney<td>$95,400<tr><td>Suki Burks<td>Developer<td>London<td>$114,500<tr><td>Prescott Bartlett<td>Technical Author<td>London<td>$145,000<tr><td>Gavin Cortez<td>Team Leader<td>San Francisco<td>$235,500<tr><td>Martena Mccray<td>Post-Sales support<td>Edinburgh<td>$324,050<tr><td>Unity Butler<td>Marketing Designer<td>San Francisco<td>$85,675<tr><td>Howard Hatfield<td>Office Manager<td>San Francisco<td>$164,500<tr><td>Hope Fuentes<td>Secretary<td>San Francisco<td>$109,850<tr><td>Vivian Harrell<td>Financial Controller<td>San Francisco<td>$452,500<tr><td>Timothy Mooney<td>Office Manager<td>London<td>$136,200<tr><td>Jackson Bradshaw<td>Director<td>New York<td>$645,750<tr><td>Olivia Liang<td>Support Engineer<td>Singapore<td>$234,500<tr><td>Bruno Nash<td>Software Engineer<td>London<td>$163,500<tr><td>Sakura Yamamoto<td>Support Engineer<td>Tokyo<td>$139,575<tr><td>Thor Walton<td>Developer<td>New York<td>$98,540<tr><td>Finn Camacho<td>Support Engineer<td>San Francisco<td>$87,500<tr><td>Serge Baldwin<td>Data Coordinator<td>Singapore<td>$138,575<tr><td>Zenaida Frank<td>Software Engineer<td>New York<td>$125,250<tr><td>Zorita Serrano<td>Software Engineer<td>San Francisco<td>$115,000<tr><td>Jennifer Acosta<td>Junior Javascript Developer<td>Edinburgh<td>$75,650<tr><td>Cara Stevens<td>Sales Assistant<td>New York<td>$145,600<tr><td>Hermione Butler<td>Regional Director<td>London<td>$356,250<tr><td>Lael Greer<td>Systems Administrator<td>London<td>$103,500<tr><td>Jonas Alexander<td>Developer<td>San Francisco<td>$86,500<tr><td>Shad Decker<td>Regional Director<td>Edinburgh<td>$183,000<tr><td>Michael Bruce<td>Javascript Developer<td>Singapore<td>$183,000<tr><td>Donna Snider<td>Customer Support<td>New York<td>$112,000</table></div><script src=https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js></script><script src=https://cdnjs.cloudflare.com/ajax/libs/datatables/1.10.20/js/jquery.dataTables.min.js></script><script src=https://cdnjs.cloudflare.com/ajax/libs/datatables/1.10.20/js/dataTables.bootstrap.min.js></script>

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Bootstrap 4 with DataTables Example: Bootstrap Docs & DataTables Docs

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$(document).ready(function() {
  $('#example').DataTable();
});

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<link href=https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.min.css rel=stylesheet><link href=https://cdnjs.cloudflare.com/ajax/libs/datatables/1.10.20/css/dataTables.bootstrap4.min.css rel=stylesheet><div class=container><h1>Bootstrap 4 DataTables</h1><table cellspacing=0 class="table table-bordered table-hover table-inverse table-striped"id=example width=100%><thead><tr><th>Name<th>Position<th>Office<th>Age<th>Start date<th>Salary<tfoot><tr><th>Name<th>Position<th>Office<th>Age<th>Start date<th>Salary<tbody><tr><td>Tiger Nixon<td>System Architect<td>Edinburgh<td>61<td>2011/04/25<td>$320,800<tr><td>Garrett Winters<td>Accountant<td>Tokyo<td>63<td>2011/07/25<td>$170,750<tr><td>Ashton Cox<td>Junior Technical Author<td>San Francisco<td>66<td>2009/01/12<td>$86,000<tr><td>Cedric Kelly<td>Senior Javascript Developer<td>Edinburgh<td>22<td>2012/03/29<td>$433,060<tr><td>Airi Satou<td>Accountant<td>Tokyo<td>33<td>2008/11/28<td>$162,700<tr><td>Brielle Williamson<td>Integration Specialist<td>New York<td>61<td>2012/12/02<td>$372,000<tr><td>Herrod Chandler<td>Sales Assistant<td>San Francisco<td>59<td>2012/08/06<td>$137,500<tr><td>Rhona Davidson<td>Integration Specialist<td>Tokyo<td>55<td>2010/10/14<td>$327,900<tr><td>Colleen Hurst<td>Javascript Developer<td>San Francisco<td>39<td>2009/09/15<td>$205,500<tr><td>Sonya Frost<td>Software Engineer<td>Edinburgh<td>23<td>2008/12/13<td>$103,600<tr><td>Jena Gaines<td>Office Manager<td>London<td>30<td>2008/12/19<td>$90,560<tr><td>Quinn Flynn<td>Support Lead<td>Edinburgh<td>22<td>2013/03/03<td>$342,000<tr><td>Charde Marshall<td>Regional Director<td>San Francisco<td>36<td>2008/10/16<td>$470,600<tr><td>Haley Kennedy<td>Senior Marketing Designer<td>London<td>43<td>2012/12/18<td>$313,500<tr><td>Tatyana Fitzpatrick<td>Regional Director<td>London<td>19<td>2010/03/17<td>$385,750<tr><td>Michael Silva<td>Marketing Designer<td>London<td>66<td>2012/11/27<td>$198,500<tr><td>Paul Byrd<td>Chief Financial Officer (CFO)<td>New York<td>64<td>2010/06/09<td>$725,000<tr><td>Gloria Little<td>Systems Administrator<td>New York<td>59<td>2009/04/10<td>$237,500<tr><td>Bradley Greer<td>Software Engineer<td>London<td>41<td>2012/10/13<td>$132,000<tr><td>Dai Rios<td>Personnel Lead<td>Edinburgh<td>35<td>2012/09/26<td>$217,500<tr><td>Jenette Caldwell<td>Development Lead<td>New York<td>30<td>2011/09/03<td>$345,000<tr><td>Yuri Berry<td>Chief Marketing Officer (CMO)<td>New York<td>40<td>2009/06/25<td>$675,000<tr><td>Caesar Vance<td>Pre-Sales Support<td>New York<td>21<td>2011/12/12<td>$106,450<tr><td>Doris Wilder<td>Sales Assistant<td>Sidney<td>23<td>2010/09/20<td>$85,600<tr><td>Angelica Ramos<td>Chief Executive Officer (CEO)<td>London<td>47<td>2009/10/09<td>$1,200,000<tr><td>Gavin Joyce<td>Developer<td>Edinburgh<td>42<td>2010/12/22<td>$92,575<tr><td>Jennifer Chang<td>Regional Director<td>Singapore<td>28<td>2010/11/14<td>$357,650<tr><td>Brenden Wagner<td>Software Engineer<td>San Francisco<td>28<td>2011/06/07<td>$206,850<tr><td>Fiona Green<td>Chief Operating Officer (COO)<td>San Francisco<td>48<td>2010/03/11<td>$850,000<tr><td>Shou Itou<td>Regional Marketing<td>Tokyo<td>20<td>2011/08/14<td>$163,000<tr><td>Michelle House<td>Integration Specialist<td>Sidney<td>37<td>2011/06/02<td>$95,400<tr><td>Suki Burks<td>Developer<td>London<td>53<td>2009/10/22<td>$114,500<tr><td>Prescott Bartlett<td>Technical Author<td>London<td>27<td>2011/05/07<td>$145,000<tr><td>Gavin Cortez<td>Team Leader<td>San Francisco<td>22<td>2008/10/26<td>$235,500<tr><td>Martena Mccray<td>Post-Sales support<td>Edinburgh<td>46<td>2011/03/09<td>$324,050<tr><td>Unity Butler<td>Marketing Designer<td>San Francisco<td>47<td>2009/12/09<td>$85,675<tr><td>Howard Hatfield<td>Office Manager<td>San Francisco<td>51<td>2008/12/16<td>$164,500<tr><td>Hope Fuentes<td>Secretary<td>San Francisco<td>41<td>2010/02/12<td>$109,850<tr><td>Vivian Harrell<td>Financial Controller<td>San Francisco<td>62<td>2009/02/14<td>$452,500<tr><td>Timothy Mooney<td>Office Manager<td>London<td>37<td>2008/12/11<td>$136,200<tr><td>Jackson Bradshaw<td>Director<td>New York<td>65<td>2008/09/26<td>$645,750<tr><td>Olivia Liang<td>Support Engineer<td>Singapore<td>64<td>2011/02/03<td>$234,500<tr><td>Bruno Nash<td>Software Engineer<td>London<td>38<td>2011/05/03<td>$163,500<tr><td>Sakura Yamamoto<td>Support Engineer<td>Tokyo<td>37<td>2009/08/19<td>$139,575<tr><td>Thor Walton<td>Developer<td>New York<td>61<td>2013/08/11<td>$98,540<tr><td>Finn Camacho<td>Support Engineer<td>San Francisco<td>47<td>2009/07/07<td>$87,500<tr><td>Serge Baldwin<td>Data Coordinator<td>Singapore<td>64<td>2012/04/09<td>$138,575<tr><td>Zenaida Frank<td>Software Engineer<td>New York<td>63<td>2010/01/04<td>$125,250<tr><td>Zorita Serrano<td>Software Engineer<td>San Francisco<td>56<td>2012/06/01<td>$115,000<tr><td>Jennifer Acosta<td>Junior Javascript Developer<td>Edinburgh<td>43<td>2013/02/01<td>$75,650<tr><td>Cara Stevens<td>Sales Assistant<td>New York<td>46<td>2011/12/06<td>$145,600<tr><td>Hermione Butler<td>Regional Director<td>London<td>47<td>2011/03/21<td>$356,250<tr><td>Lael Greer<td>Systems Administrator<td>London<td>21<td>2009/02/27<td>$103,500<tr><td>Jonas Alexander<td>Developer<td>San Francisco<td>30<td>2010/07/14<td>$86,500<tr><td>Shad Decker<td>Regional Director<td>Edinburgh<td>51<td>2008/11/13<td>$183,000<tr><td>Michael Bruce<td>Javascript Developer<td>Singapore<td>29<td>2011/06/27<td>$183,000<tr><td>Donna Snider<td>Customer Support<td>New York<td>27<td>2011/01/25<td>$112,000</table></div><script src=https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js></script><script src=https://cdnjs.cloudflare.com/ajax/libs/datatables/1.10.20/js/jquery.dataTables.min.js></script><script src=https://cdnjs.cloudflare.com/ajax/libs/datatables/1.10.20/js/dataTables.bootstrap4.min.js></script>

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Bootstrap 3 with Bootstrap Table Example: Bootstrap Docs & Bootstrap Table Docs

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<link href=https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css rel=stylesheet><link href=https://cdnjs.cloudflare.com/ajax/libs/bootstrap-table/1.16.0/bootstrap-table.min.css rel=stylesheet><table data-sort-name=stargazers_count data-sort-order=desc data-toggle=table data-url="https://api.github.com/users/wenzhixin/repos?type=owner&sort=full_name&direction=asc&per_page=100&page=1"><thead><tr><th data-field=name data-sortable=true>Name<th data-field=stargazers_count data-sortable=true>Stars<th data-field=forks_count data-sortable=true>Forks<th data-field=description data-sortable=true>Description</thead></table><script src=https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js></script><script src=https://cdnjs.cloudflare.com/ajax/libs/bootstrap-table/1.16.0/bootstrap-table.min.js></script>

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Bootstrap 3 with Bootstrap Sortable Example: Bootstrap Docs & Bootstrap Sortable Docs

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function randomDate(t,e){return new Date(t.getTime()+Math.random()*(e.getTime()-t.getTime()))}function randomName(){return["Jack","Peter","Frank","Steven"][Math.floor(4*Math.random())]+" "+["White","Jackson","Sinatra","Spielberg"][Math.floor(4*Math.random())]}function newTableRow(){var t=moment(randomDate(new Date(2e3,0,1),new Date)).format("D.M.YYYY"),e=Math.round(Math.random()*Math.random()*100*100)/100,a=Math.round(Math.random()*Math.random()*100*100)/100,r=Math.round(Math.random()*Math.random()*100*100)/100;return"<tr><td>"+randomName()+"</td><td>"+e+"</td><td>"+a+"</td><td>"+r+"</td><td>"+Math.round(100*(e+a+r))/100+"</td><td data-dateformat='D-M-YYYY'>"+t+"</td></tr>"}function customSort(){alert("Custom sort.")}!function(t,e){"use strict";"function"==typeof define&&define.amd?define("tinysort",function(){return e}):t.tinysort=e}(this,function(){"use strict";function t(t,e){for(var a,r=t.length,o=r;o--;)e(t[a=r-o-1],a)}function e(t,e,a){for(var o in 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t}M(a)&&(a=d.querySelectorAll(a)),0===a.length&&console.warn("No elements to sort");var x,N,F=d.createDocumentFragment(),D=[],Y=[],$=[],E=[],k=!0,A=a.length&&a[0].parentNode,T=A.rootNode!==document,R=a.length&&(s===r||!1!==s.useFlex)&&!T&&-1!==getComputedStyle(A,null).display.indexOf("flex");return function(){0===arguments.length?v({}):t(arguments,function(t){v(M(t)?{selector:t}:t)}),f=E.length}.apply(n,Array.prototype.slice.call(arguments,1)),t(a,function(t,e){N?N!==t.parentNode&&(k=!1):N=t.parentNode;var a=E[0],r=a.hasFilter,o=a.selector,n=!o||r&&t.matchesSelector(o)||o&&t.querySelector(o)?Y:$,s={elm:t,pos:e,posn:n.length};D.push(s),n.push(s)}),x=Y.slice(0),Y.sort(function(e,a){var n=0;for(0!==h&&(h=0);0===n&&f>h;){var s=E[h],d=s.ignoreDashes?c:l;if(t(u,function(t){var e=t.prepare;e&&e(s)}),s.sortFunction)n=s.sortFunction(e,a);else if("rand"==s.order)n=Math.random()<.5?1:-1;else{var p=o,m=C(e,s),v=C(a,s),w=""===m||m===r,S=""===v||v===r;if(m===v)n=0;else if(s.emptyEnd&&(w||S))n=w&&S?0:w?1:-1;else{if(!s.forceStrings){var y=M(m)?m&&m.match(d):o,x=M(v)?v&&v.match(d):o;y&&x&&m.substr(0,m.length-y[0].length)==v.substr(0,v.length-x[0].length)&&(p=!o,m=i(y[0]),v=i(x[0]))}n=m===r||v===r?0:s.natural&&(isNaN(m)||isNaN(v))?b(m,v,g):v>m?-1:m>v?1:0}}t(u,function(t){var e=t.sort;e&&(n=e(s,p,m,v,n))}),0==(n*=s.sortReturnNumber)&&h++}return 0===n&&(n=e.pos>a.pos?1:-1),n}),function(){var t=Y.length===D.length;if(k&&t)R?Y.forEach(function(t,e){t.elm.style.order=e}):N?N.appendChild(w()):console.warn("parentNode has been removed");else{var e=E[0].place,a="start"===e,r="end"===e,o="first"===e,n="last"===e;if("org"===e)Y.forEach(S),Y.forEach(function(t,e){y(x[e],t.elm)});else if(a||r){var s=x[a?0:x.length-1],d=s&&s.elm.parentNode,i=d&&(a&&d.firstChild||d.lastChild);i&&(i!==s.elm&&(s={elm:i}),S(s),r&&d.appendChild(s.ghost),y(s,w()))}else(o||n)&&y(S(x[o?0:x.length-1]),w())}}(),Y.map(function(t){return t.elm})},{plugin:a,defaults:m})}()),function(t,e){"function"==typeof define&&define.amd?define(["jquery","tinysort","moment"],e):e(t.jQuery,t.tinysort,t.moment||void 0)}(this,function(t,e,a){var r,o,n,s=t(document);function d(e){var s=void 0!==a;r=e.sign?e.sign:"arrow","default"==e.customSort&&(e.customSort=c),o=e.customSort||o||c,n=e.emptyEnd,t("table.sortable").each(function(){var r=t(this),o=!0===e.applyLast;r.find("span.sign").remove(),r.find("> thead [colspan]").each(function(){for(var e=parseFloat(t(this).attr("colspan")),a=1;a<e;a++)t(this).after('<th class="colspan-compensate">')}),r.find("> thead [rowspan]").each(function(){for(var e=t(this),a=parseFloat(e.attr("rowspan")),r=1;r<a;r++){var o=e.parent("tr"),n=o.next("tr"),s=o.children().index(e);n.children().eq(s).before('<th class="rowspan-compensate">')}}),r.find("> thead tr").each(function(e){t(this).find("th").each(function(a){var r=t(this);r.addClass("nosort").removeClass("up down"),r.attr("data-sortcolumn",a),r.attr("data-sortkey",a+"-"+e)})}),r.find("> thead .rowspan-compensate, .colspan-compensate").remove(),r.find("th").each(function(){var e=t(this);if(void 0!==e.attr("data-dateformat")&&s){var o=parseFloat(e.attr("data-sortcolumn"));r.find("td:nth-child("+(o+1)+")").each(function(){var r=t(this);r.attr("data-value",a(r.text(),e.attr("data-dateformat")).format("YYYY/MM/DD/HH/mm/ss"))})}else if(void 0!==e.attr("data-valueprovider")){o=parseFloat(e.attr("data-sortcolumn"));r.find("td:nth-child("+(o+1)+")").each(function(){var a=t(this);a.attr("data-value",new RegExp(e.attr("data-valueprovider")).exec(a.text())[0])})}}),r.find("td").each(function(){var e=t(this);void 0!==e.attr("data-dateformat")&&s?e.attr("data-value",a(e.text(),e.attr("data-dateformat")).format("YYYY/MM/DD/HH/mm/ss")):void 0!==e.attr("data-valueprovider")?e.attr("data-value",new RegExp(e.attr("data-valueprovider")).exec(e.text())[0]):void 0===e.attr("data-value")&&e.attr("data-value",e.text())});var n=l(r),d=n.bsSort;r.find('> thead th[data-defaultsort!="disabled"]').each(function(e){var a=t(this),r=a.closest("table.sortable");a.data("sortTable",r);var s=a.attr("data-sortkey"),i=o?n.lastSort:-1;d[s]=o?d[s]:a.attr("data-defaultsort"),void 0!==d[s]&&o===(s===i)&&(d[s]="asc"===d[s]?"desc":"asc",u(a,r))})})}function i(e){var a=t(e),r=a.data("sortTable")||a.closest("table.sortable");u(a,r)}function l(e){var a=e.data("bootstrap-sortable-context");return void 0===a&&(a={bsSort:[],lastSort:void 0},e.find('> thead th[data-defaultsort!="disabled"]').each(function(e){var r=t(this),o=r.attr("data-sortkey");a.bsSort[o]=r.attr("data-defaultsort"),void 0!==a.bsSort[o]&&(a.lastSort=o)}),e.data("bootstrap-sortable-context",a)),a}function c(t,a){e(t,a)}function u(e,a){a.trigger("before-sort");var s=parseFloat(e.attr("data-sortcolumn")),d=l(a),i=d.bsSort;if(e.attr("colspan")){var c=parseFloat(e.data("mainsort"))||0,f=parseFloat(e.data("sortkey").split("-").pop());if(a.find("> thead tr").length-1>f)return void u(a.find('[data-sortkey="'+(s+c)+"-"+(f+1)+'"]'),a);s+=c}var h=e.attr("data-defaultsign")||r;if(a.find("> thead th").each(function(){t(this).removeClass("up").removeClass("down").addClass("nosort")}),t.browser.mozilla){var p=a.find("> thead div.mozilla");void 0!==p&&(p.find(".sign").remove(),p.parent().html(p.html())),e.wrapInner('<div class="mozilla"></div>'),e.children().eq(0).append('<span class="sign '+h+'"></span>')}else a.find("> thead span.sign").remove(),e.append('<span class="sign '+h+'"></span>');var m=e.attr("data-sortkey"),v="desc"!==e.attr("data-firstsort")?"desc":"asc",b=i[m]||v;d.lastSort!==m&&void 0!==i[m]||(b="asc"===b?"desc":"asc"),i[m]=b,d.lastSort=m,"desc"===i[m]?(e.find("span.sign").addClass("up"),e.addClass("up").removeClass("down nosort")):e.addClass("down").removeClass("up nosort");var g=a.children("tbody").children("tr"),w=[];t(g.filter('[data-disablesort="true"]').get().reverse()).each(function(e,a){var r=t(a);w.push({index:g.index(r),row:r}),r.remove()});var S=g.not('[data-disablesort="true"]');if(0!=S.length){var y="asc"===i[m]&&n;o(S,{emptyEnd:y,selector:"td:nth-child("+(s+1)+")",order:i[m],data:"value"})}t(w.reverse()).each(function(t,e){0===e.index?a.children("tbody").prepend(e.row):a.children("tbody").children("tr").eq(e.index-1).after(e.row)}),a.find("> tbody > tr > td.sorted,> thead th.sorted").removeClass("sorted"),S.find("td:eq("+s+")").addClass("sorted"),e.addClass("sorted"),a.trigger("sorted")}if(t.bootstrapSortable=function(t){null==t?d({}):t.constructor===Boolean?d({applyLast:t}):void 0!==t.sortingHeader?i(t.sortingHeader):d(t)},s.on("click",'table.sortable>thead th[data-defaultsort!="disabled"]',function(t){i(this)}),!t.browser){t.browser={chrome:!1,mozilla:!1,opera:!1,msie:!1,safari:!1};var f=navigator.userAgent;t.each(t.browser,function(e){t.browser[e]=!!new RegExp(e,"i").test(f),t.browser.mozilla&&"mozilla"===e&&(t.browser.mozilla=!!new RegExp("firefox","i").test(f)),t.browser.chrome&&"safari"===e&&(t.browser.safari=!1)})}t(t.bootstrapSortable)}),function(){var t=$("table");t.append(newTableRow()),t.append(newTableRow()),$("button.add-row").on("click",function(){var e=$(this);t.append(newTableRow()),e.data("sort")?$.bootstrapSortable(!0):$.bootstrapSortable(!1)}),$("button.change-sort").on("click",function(){$(this).data("custom")?$.bootstrapSortable(!0,void 0,customSort):$.bootstrapSortable(!0,void 0,"default")}),t.on("sorted",function(){alert("Table was sorted.")}),$("#event").on("change",function(){$(this).is(":checked")?t.on("sorted",function(){alert("Table was sorted.")}):t.off("sorted")}),$("input[name=sign]:radio").change(function(){$.bootstrapSortable(!0,$(this).val())})}();

_x000D_

table.sortable span.sign { display: block; position: absolute; top: 50%; right: 5px; font-size: 12px; margin-top: -10px; color: #bfbfc1; } table.sortable th:after { display: block; position: absolute; top: 50%; right: 5px; font-size: 12px; margin-top: -10px; color: #bfbfc1; } table.sortable th.arrow:after { content: ''; } table.sortable span.arrow, span.reversed, th.arrow.down:after, th.reversedarrow.down:after, th.arrow.up:after, th.reversedarrow.up:after { border-style: solid; border-width: 5px; font-size: 0; border-color: #ccc transparent transparent transparent; line-height: 0; height: 0; width: 0; margin-top: -2px; } table.sortable span.arrow.up, th.arrow.up:after { border-color: transparent transparent #ccc transparent; margin-top: -7px; } table.sortable span.reversed, th.reversedarrow.down:after { border-color: transparent transparent #ccc transparent; margin-top: -7px; } table.sortable span.reversed.up, th.reversedarrow.up:after { border-color: #ccc transparent transparent transparent; margin-top: -2px; } table.sortable span.az:before, th.az.down:after { content: "a .. z"; } table.sortable span.az.up:before, th.az.up:after { content: "z .. a"; } table.sortable th.az.nosort:after, th.AZ.nosort:after, th._19.nosort:after, th.month.nosort:after { content: ".."; } table.sortable span.AZ:before, th.AZ.down:after { content: "A .. Z"; } table.sortable span.AZ.up:before, th.AZ.up:after { content: "Z .. A"; } table.sortable span._19:before, th._19.down:after { content: "1 .. 9"; } table.sortable span._19.up:before, th._19.up:after { content: "9 .. 1"; } table.sortable span.month:before, th.month.down:after { content: "jan .. dec"; } table.sortable span.month.up:before, th.month.up:after { content: "dec .. jan"; } table.sortable thead th:not([data-defaultsort=disabled]) { cursor: pointer; position: relative; top: 0; left: 0; } table.sortable thead th:hover:not([data-defaultsort=disabled]) { background: #efefef; } table.sortable thead th div.mozilla { position: relative; }

_x000D_

<link href=https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.13.1/css/all.min.css rel=stylesheet><link href=https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css rel=stylesheet><div class=container><div class=hero-unit><h1>Bootstrap Sortable</h1></div><table class="sortable table table-bordered table-striped"><thead><tr><th style=width:20%;vertical-align:middle data-defaultsign=nospan class=az data-defaultsort=asc rowspan=2><i class="fa fa-fw fa-map-marker"></i>Name<th style=text-align:center colspan=4 data-mainsort=3>Results<th data-defaultsort=disabled><tr><th style=width:20% colspan=2 data-mainsort=1 data-firstsort=desc>Round 1<th style=width:20%>Round 2<th style=width:20%>Total<t



How to format strings in Java
 
This solution worked for me. I needed to create urls for a REST client dynamically so I created this method, so you just have to pass the restURL like this
/customer/{0}/user/{1}/order

and add as many params as you need:
public String createURL (String restURL, Object ... params) {       
    return new MessageFormat(restURL).format(params);
}

You just have to call this method like this:
createURL("/customer/{0}/user/{1}/order", 123, 321);

The output 

"/customer/123/user/321/order"



New og:image size for Facebook share?
 
What size this image should be depends on where it is to be used.
It is up to applications, eg WhatsApp, Facebook Messenger, Reddit, etc etc to decide what to do with the image. Some use it as a square image, some as a 1:19.1 rectangle, and some use different sizes when the display environment is of different sizes even for the same application. There are no rules, and there is no way to control what applications do with the image.
So you should test out the image on your intended target application(s) and find a compromise. That applications tend to cache the image makes it a pain on the trial and error approach.


Is it possible to set the stacking order of pseudo-elements below their parent element?
 
Set the z-index of the :before or :after pseudo element to -1 and give it a position that honors the z-index property (absolute, relative, or fixed). This works because the pseudo element's z-index is relative to its parent element, rather than <html>, which is the default for other elements. Which makes sense because they are child elements of <html>.
The problem I was having (that lead me to this question and the accepted answer above) was that I was trying to use a :after pseudo element to get fancy with a background to an element with z-index of 15, and even when set with a z-index of 14, it was still being rendered on top of its parent. This is because, in that stacking context, it's parent has a z-index of 0.
Hopefully that helps clarify a little what's going on.


How can I recover the return value of a function passed to multiprocessing.Process?
 
Thought I'd simplify the simplest examples copied from above, working for me on Py3.6. Simplest is multiprocessing.Pool:
import multiprocessing
import time

def worker(x):
    time.sleep(1)
    return x

pool = multiprocessing.Pool()
print(pool.map(worker, range(10)))

You can set the number of processes in the pool with, e.g., Pool(processes=5). However it defaults to CPU count, so leave it blank for CPU-bound tasks. (I/O-bound tasks often suit threads anyway, as the threads are mostly waiting so can share a CPU core.) Pool also applies chunking optimization.
(Note that the worker method cannot be nested within a method. I initially defined my worker method inside the method that makes the call to pool.map, to keep it all self-contained, but then the processes couldn't import it, and threw "AttributeError: Can't pickle local object outer_method..inner_method". More here. It can be inside a class.)
(Appreciate the original question specified printing 'represent!' rather than time.sleep(), but without it I thought some code was running concurrently when it wasn't.)

Py3's ProcessPoolExecutor is also two lines (.map returns a generator so you need the list()):
from concurrent.futures import ProcessPoolExecutor
with ProcessPoolExecutor() as executor:
    print(list(executor.map(worker, range(10))))


With plain Processes:
import multiprocessing
import time

def worker(x, queue):
    time.sleep(1)
    queue.put(x)

queue = multiprocessing.SimpleQueue()
tasks = range(10)

for task in tasks:
    multiprocessing.Process(target=worker, args=(task, queue,)).start()

for _ in tasks:
    print(queue.get())

Use SimpleQueue if all you need is put and get. The first loop starts all the processes, before the second makes the blocking queue.get calls. I don't think there's any reason to call p.join() too.


How do I create a MongoDB dump of my database?
 
Following command connect to the remote server to dump a database:
<> optional params use them if you need them

host - host name port
listening port username 
username of db db 
db name ssl
secure connection out 
output to a created folder with a name
mongodump --host --port --username --db --ssl --password --out _date+"%Y-%m-%d"



How to install Python MySQLdb module using pip?
 
If you are use Raspberry Pi [Raspbian OS]
There are need to be install pip command at first 
apt-get install python-pip

So that just install Sequently
apt-get install python-dev libmysqlclient-dev

apt-get install python-pip

pip install MySQL-python



Change the content of a div based on selection from dropdown menu
 
Meh too slow. Here's my example anyway :)

http://jsfiddle.net/cqDES/
$(function() {
    $('select').change(function() {
        var val = $(this).val();
        if (val) {
            $('div:not(#div' + val + ')').slideUp();
            $('#div' + val).slideDown();
        } else {
            $('div').slideDown();
        }
    });
});



How does String substring work in Swift
 
I'm really frustrated at Swift's String access model: everything has to be an Index. All I want is to access the i-th character of the string using Int, not the clumsy index and advancing (which happens to change with every major release). So I made an extension to String:
extension String {
    func index(from: Int) -> Index {
        return self.index(startIndex, offsetBy: from)
    }

    func substring(from: Int) -> String {
        let fromIndex = index(from: from)
        return String(self[fromIndex...])
    }

    func substring(to: Int) -> String {
        let toIndex = index(from: to)
        return String(self[..<toIndex])
    }

    func substring(with r: Range<Int>) -> String {
        let startIndex = index(from: r.lowerBound)
        let endIndex = index(from: r.upperBound)
        return String(self[startIndex..<endIndex])
    }
}

let str = "Hello, playground"
print(str.substring(from: 7))         // playground
print(str.substring(to: 5))           // Hello
print(str.substring(with: 7..<11))    // play



How to get just the date part of getdate()?
 
Try this:
SELECT CONVERT(date, GETDATE())



JQuery Parsing JSON array
 
var dataArray = [];
var obj = jQuery.parseJSON(yourInput);

$.each(obj, function (index, value) {
    dataArray.push([value["yourID"].toString(), value["yourValue"] ]);
});

this helps me a lot :-) 


How to escape indicator characters (i.e. : or - ) in YAML
 
If you're using @ConfigurationProperties with Spring Boot 2 to inject maps with keys that contain colons then you need an additional level of escaping using square brackets inside the quotes because spring only allows alphanumeric and '-' characters, stripping out the rest. Your new key would look like this: 
"[8.11.32.120:8000]": GoogleMapsKeyforThisDomain

See this github issue for reference.


How do I make Java register a string input with spaces?
 
Since it's a long time and people keep suggesting to use Scanner#nextLine(), there's another chance that Scanner can take spaces included in input.
Class Scanner

A Scanner breaks its input into tokens using a delimiter pattern, which by default matches whitespace.

You can use Scanner#useDelimiter() to change the delimiter of Scanner to another pattern such as a line feed or something else.
Scanner in = new Scanner(System.in);
in.useDelimiter("\n"); // use LF as the delimiter
String question;

System.out.println("Please input question:");
question = in.next();

// TODO do something with your input such as removing spaces...

if (question.equalsIgnoreCase("howdoyoulikeschool?") )
    /* it seems strings do not allow for spaces */
    System.out.println("CLOSED!!");
else
    System.out.println("Que?");



How to change font in ipython notebook
 
In JupyterNotebook cell,
Simply you can use:
%%html
<style type='text/css'>
.CodeMirror{
font-size: 17px;
</style>



Using 'make' on OS X
 
In addition, if you have migrated your user files and applications from one mac to another, you need to install Apple Developer Tools all over again. The migration assistant does not account for the developer tools installation.


Difference between [routerLink] and routerLink
 
You'll see this in all the directives:
When you use brackets, it means you're passing a bindable property (a variable).
  <a [routerLink]="routerLinkVariable"></a>

So this variable (routerLinkVariable) could be defined inside your class and it should have a value like below: 
export class myComponent {

    public routerLinkVariable = "/home"; // the value of the variable is string!

But with variables, you have the opportunity to make it dynamic right? 
export class myComponent {

    public routerLinkVariable = "/home"; // the value of the variable is string!


    updateRouterLinkVariable(){

        this.routerLinkVariable = '/about';
    }

Where as without brackets you're passing string only and you can't change it, it's hard coded and it'll be like that throughout your app.
<a routerLink="/home"></a>

UPDATE : 
The other speciality about using brackets specifically for routerLink is that you can pass dynamic parameters to the link you're navigating to: 
So adding a new variable 
export class myComponent {
        private dynamicParameter = '129';
        public routerLinkVariable = "/home"; 

Updating the [routerLink]
  <a [routerLink]="[routerLinkVariable,dynamicParameter]"></a>

When you want to click on this link, it would become:
  <a href="/home/129"></a>



Passing variables, creating instances, self, The mechanics and usage of classes: need explanation
 
class Foo          (object):
    # ^class name  #^ inherits from object

    bar = "Bar" #Class attribute.

    def __init__(self):
        #        #^ The first variable is the class instance in methods.  
        #        #  This is called "self" by convention, but could be any name you want.
        #^ double underscore (dunder) methods are usually special.  This one 
        #  gets called immediately after a new instance is created.

        self.variable = "Foo" #instance attribute.
        print self.variable, self.bar  #<---self.bar references class attribute
        self.bar = " Bar is now Baz"   #<---self.bar is now an instance attribute
        print self.variable, self.bar  

    def method(self, arg1, arg2):
        #This method has arguments.  You would call it like this:  instance.method(1, 2)
        print "in method (args):", arg1, arg2
        print "in method (attributes):", self.variable, self.bar


a = Foo() # this calls __init__ (indirectly), output:
                 # Foo bar
                 # Foo  Bar is now Baz
print a.variable # Foo
a.variable = "bar"
a.method(1, 2) # output:
               # in method (args): 1 2
               # in method (attributes): bar  Bar is now Baz
Foo.method(a, 1, 2) #<--- Same as a.method(1, 2).  This makes it a little more explicit what the argument "self" actually is.

class Bar(object):
    def __init__(self, arg):
        self.arg = arg
        self.Foo = Foo()

b = Bar(a)
b.arg.variable = "something"
print a.variable # something
print b.Foo.variable # Foo



How to convert an OrderedDict into a regular dict in python3
 
Even though this is a year old question, I would like to say that using dict will not help if you have an ordered dict within the ordered dict. The simplest way that could convert those recursive ordered dict will be
import json
from collections import OrderedDict
input_dict = OrderedDict([('method', 'constant'), ('recursive', OrderedDict([('m', 'c')]))])
output_dict = json.loads(json.dumps(input_dict))
print output_dict



Go / golang time.Now().UnixNano() convert to milliseconds?
 
As @Jono points out in @OneOfOne's answer, the correct answer should take into account the duration of a nanosecond. Eg:
func makeTimestamp() int64 {
    return time.Now().UnixNano() / (int64(time.Millisecond)/int64(time.Nanosecond))
}

OneOfOne's answer works because time.Nanosecond happens to be 1, and dividing by 1 has no effect. I don't know enough about go to know how likely this is to change in the future, but for the strictly correct answer I would use this function, not OneOfOne's answer. I doubt there is any performance disadvantage as the compiler should be able to optimize this perfectly well.
See https://en.wikipedia.org/wiki/Dimensional_analysis
Another way of looking at this is that both time.Now().UnixNano() and time.Millisecond use the same units (Nanoseconds). As long as that is true, OneOfOne's answer should work perfectly well.


registerForRemoteNotificationTypes: is not supported in iOS 8.0 and later
 
Building on @Prasath's answer. This is how you do it in Swift:
if application.respondsToSelector("isRegisteredForRemoteNotifications")
{
    // iOS 8 Notifications
    application.registerUserNotificationSettings(UIUserNotificationSettings(forTypes: (.Badge | .Sound | .Alert), categories: nil));
    application.registerForRemoteNotifications()
}
else
{
    // iOS < 8 Notifications
    application.registerForRemoteNotificationTypes(.Badge | .Sound | .Alert)
}



Function in JavaScript that can be called only once
 
If your using Node.js or writing JavaScript with browserify, consider the "once" npm module:
var once = require('once')

function load (file, cb) {
  cb = once(cb)
  loader.load('file')
  loader.once('load', cb)
  loader.once('error', cb)
}



How to initialize an array's length in JavaScript?
 
With ES2015 .fill() you can now simply do:
// `n` is the size you want to initialize your array
// `0` is what the array will be filled with (can be any other value)
Array(n).fill(0)

Which is a lot more concise than Array.apply(0, new Array(n)).map(i => value)
It is possible to drop the 0 in .fill() and run without arguments, which will fill the array with undefined. (However, this will fail in Typescript)


Show two digits after decimal point in c++
 
The easiest way to do this, is using cstdio's printf. Actually, i'm surprised that anyone mentioned printf! anyway, you need to include the library, like this...
#include<cstdio>

int main() {
    double total;
    cin>>total;
    printf("%.2f\n", total);
}

This will print the value of "total" (that's what %, and then ,total does) with 2 floating points (that's what .2f does). And the \n at the end, is just the end of line, and this works with UVa's judge online compiler options, that is:
g++ -lm -lcrypt -O2 -pipe -DONLINE_JUDGE filename.cpp

the code you are trying to run will not run with this compiler options...


PHP-FPM and Nginx: 502 Bad Gateway
 
The port was changed to 9001 in 5.4, just changing the port from 9000 to 9001 in the nginx conf and in php-fpm configuration worked for me.


Why should I use core.autocrlf=true in Git?
 
I am a .NET developer, and have used Git and Visual Studio for years. My strong recommendation is set line endings to true. And do it as early as you can in the lifetime of your Repository.
That being said, I HATE that Git changes my line endings. A source control should only save and retrieve the work I do, it should NOT modify it. Ever. But it does.
What will happen if you don't have every developer set to true, is ONE developer eventually will set to true. This will begin to change the line endings of all of your files to LF in your repo. And when users set to false check those out, Visual Studio will warn you, and ask you to change them. You will have 2 things happen very quickly. One, you will get more and more of those warnings, the bigger your team the more you get. The second, and worse thing, is that it will show that every line of every modified file was changed(because the line endings of every line will be changed by the true guy). Eventually you won't be able to track changes in your repo reliably anymore. It is MUCH easier and cleaner to make everyone keep to true, than to try to keep everyone false. As horrible as it is to live with the fact that your trusted source control is doing something it should not. Ever.


How to execute function in SQL Server 2008
 
I have come to this question and the one below several times.
how to call scalar function in sql server 2008
Each time, I try entering the Function using the syntax shown here in SQL Server Management Studio, or SSMS, to see the results, and each time I get the errors.
For me, that is because my result set is in tabular data format. Therefore, to see the results in SSMS, I have to call it like this:
SELECT * FROM dbo.Afisho_rankimin_TABLE(5);

I understand that the author's question involved a scalar function, so this answer is only to help others who come to StackOverflow often when they have a problem with a query (like me).
I hope this helps others.


Enter triggers button click
 
You can use javascript to block form submission until the appropriate time. A very crude example:
<form onsubmit='return false;' id='frmNoEnterSubmit' action="index.html">

    <input type='text' name='txtTest' />

    <input type='button' value='Submit' 
        onclick='document.forms["frmNoEnterSubmit"].onsubmit=""; document.forms["frmNoEnterSubmit"].submit();' />

</form>

Pressing enter will still trigger the form to submit, but the javascript will keep it from actually submitting, until you actually press the button.


The type must be a reference type in order to use it as parameter 'T' in the generic type or method
 
If you put constrains on a generic class or method, every other generic class or method that is using it need to have "at least" those constrains.


Git fast forward VS no fast forward merge
 
When we work on development environment and merge our code to staging/production branch then Git no fast forward can be a better option. Usually when we work in development branch for a single feature we tend to have multiple commits. Tracking changes with multiple commits can be inconvenient later on. If we merge with staging/production branch using Git no fast forward then it will have only 1 commit. Now anytime we want to revert the feature, just revert that commit. Life is easy.


Bootstrap button - remove outline on Chrome OS X
 
In the mixins of the Bootstrap sources Sass files, remove all $border references (not in the outline variant).
@mixin button-variant($color, $background, $border){ 
$active-background: darken($background, 10%);
//$active-border: darken($border, 12%);    
  color: $color;
  background-color: $background;
  //border-color: $border;
  @include box-shadow($btn-box-shadow);
  [...]
}

Or simply code you own _customButton.scss mixin.


Verifying that a string contains only letters in C#
 
You can loop on the chars of string and check using the Char Method IsLetter
but you can also do a trick using String method IndexOfAny to search other charaters that are not suppose to be in the string. 


Common HTTPclient and proxy
 
If your software uses a ProxySelector (for example for using a PAC-script instead of a static host/port) and your HTTPComponents is version 4.3 or above then you can use your ProxySelector for your HttpClient like this:
ProxySelector myProxySelector = ...;
HttpClient myHttpClient = HttpClientBuilder.create().setRoutePlanner(new SystemDefaultRoutePlanner(myProxySelector))).build();

And then do your requests as usual:
HttpGet myRequest = new HttpGet("/");
myHttpClient.execute(myRequest);



Can a JSON value contain a multiline string
 
Per the specification, the JSON grammar's char production can take the following values:

any-Unicode-character-except-"-or-\-or-control-character
\"
\\
\/
\b
\f
\n
\r
\t
\u four-hex-digits

Newlines are "control characters", so no, you may not have a literal newline within your string. However, you may encode it using whatever combination of \n and \r you require.
The JSONLint tool confirms that your JSON is invalid.

And, if you want to write newlines inside your JSON syntax without actually including newlines in the data, then you're doubly out of luck. While JSON is intended to be human-friendly to a degree, it is still data and you're trying to apply arbitrary formatting to that data. That is absolutely not what JSON is about.


How can I access Oracle from Python?
 
In addition to cx_Oracle, you need to have the Oracle client library installed and the paths set correctly in order for cx_Oracle to find it - try opening the cx_Oracle DLL in "Dependency Walker" (http://www.dependencywalker.com/) to see what the missing DLL is.


How to provide shadow to Button
 
Use this approach to get your desired look.

button_selector.xml :
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item>
    <layer-list>
        <item android:right="5dp" android:top="5dp">
            <shape>
                <corners android:radius="3dp" />
                <solid android:color="#D6D6D6" />
            </shape>
        </item>
        <item android:bottom="2dp" android:left="2dp">
            <shape>
                <gradient android:angle="270" 
                    android:endColor="#E2E2E2" android:startColor="#BABABA" />
                <stroke android:width="1dp" android:color="#BABABA" />
                <corners android:radius="4dp" />
                <padding android:bottom="10dp" android:left="10dp" 
                    android:right="10dp" android:top="10dp" />
            </shape>
        </item>
    </layer-list>
</item>

</selector>

And in your xml layout:
<Button
   android:background="@drawable/button_selector"
   ...
   ..
/>



Client on Node.js: Uncaught ReferenceError: require is not defined
 
Even using this won't work. I think the best solution is Browserify:
module.exports = {
  func1: function () {
   console.log("I am function 1");
  },
  func2: function () {
    console.log("I am function 2");
  }
};

-getFunc1.js-
var common = require('./common');
common.func1();



How do I use PHP to get the current year?
 
<?php echo date("Y"); ?>



How to declare a Fixed length Array in TypeScript
 
Actually, You can achieve this with current typescript:
type Grow<T, A extends Array<T>> = ((x: T, ...xs: A) => void) extends ((...a: infer X) => void) ? X : never;
type GrowToSize<T, A extends Array<T>, N extends number> = { 0: A, 1: GrowToSize<T, Grow<T, A>, N> }[A['length'] extends N ? 0 : 1];

export type FixedArray<T, N extends number> = GrowToSize<T, [], N>;

Examples:
// OK
const fixedArr3: FixedArray<string, 3> = ['a', 'b', 'c'];

// Error:
// Type '[string, string, string]' is not assignable to type '[string, string]'.
//   Types of property 'length' are incompatible.
//     Type '3' is not assignable to type '2'.ts(2322)
const fixedArr2: FixedArray<string, 2> = ['a', 'b', 'c'];

// Error:
// Property '3' is missing in type '[string, string, string]' but required in type 
// '[string, string, string, string]'.ts(2741)
const fixedArr4: FixedArray<string, 4> = ['a', 'b', 'c'];

EDIT (after a long time)
This should handle bigger sizes (as basically it grows array exponentially until we get to closest power of two):
type Shift<A extends Array<any>> = ((...args: A) => void) extends ((...args: [A[0], ...infer R]) => void) ? R : never;

type GrowExpRev<A extends Array<any>, N extends number, P extends Array<Array<any>>> = A['length'] extends N ? A : {
  0: GrowExpRev<[...A, ...P[0]], N, P>,
  1: GrowExpRev<A, N, Shift<P>>
}[[...A, ...P[0]][N] extends undefined ? 0 : 1];

type GrowExp<A extends Array<any>, N extends number, P extends Array<Array<any>>> = A['length'] extends N ? A : {
  0: GrowExp<[...A, ...A], N, [A, ...P]>,
  1: GrowExpRev<A, N, P>
}[[...A, ...A][N] extends undefined ? 0 : 1];

export type FixedSizeArray<T, N extends number> = N extends 0 ? [] : N extends 1 ? [T] : GrowExp<[T, T], N, [[T]]>;



How to convert string to XML using C#
 
Use LoadXml Method of XmlDocument;
string xml = "<head><body><Inner> welcome </head> </Inner> <Outer> Bye</Outer></body></head>";
xDoc.LoadXml(xml);



Copy files from one directory into an existing directory
 
If you want to copy something from one directory into the current directory, do this:
cp dir1/* .

This assumes you're not trying to copy hidden files.


When to use Common Table Expression (CTE)
 
 ;with cte as
  (
  Select Department, Max(salary) as MaxSalary
  from test
  group by department
  )  
  select t.* from test t join cte c on c.department=t.department 
  where t.salary=c.MaxSalary;

try this


Valid values for android:fontFamily and what they map to?
 
As far as I'm aware, you can't declare custom fonts in xml or themes. I usually just make custom classes extending textview that set their own font on instantiation and use those in my layout xml files.
ie:
public class Museo500TextView extends TextView {
    public Museo500TextView(Context context, AttributeSet attrs) {
        super(context, attrs);      
        this.setTypeface(Typeface.createFromAsset(context.getAssets(), "path/to/font.ttf"));
    }
}

and
<my.package.views.Museo900TextView
        android:id="@+id/dialog_error_text_header"
        android:layout_width="190dp"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        android:textSize="12sp" />



JSON, REST, SOAP, WSDL, and SOA: How do they all link together
 
WSDL: Stands for Web Service Description Language
In SOAP(simple object access protocol), when you use web service and add a web service to your project, your client application(s) doesn't know about web service Functions. Nowadays it's somehow old-fashion and for each kind of different client you have to implement different WSDL files. For example you cannot use same file for .Net and php client.
The WSDL file has some descriptions about web service functions. The type of this file is XML. SOAP is an alternative for REST.
REST: Stands for Representational State Transfer
It is another kind of API service, it is really easy to use for clients. They do not need to have special file extension like WSDL files. The CRUD operation can be implemented by different HTTP Verbs(GET for Reading, POST for Creation, PUT or PATCH for Updating and DELETE for Deleting the desired document) , They are based on HTTP protocol and most of times the response is in JSON or XML format. On the other hand the client application have to exactly call the related HTTP Verb via exact parameters names and types. Due to not having special file for definition, like WSDL, it is a manually job using the endpoint. But it is not a big deal because now we have a lot of plugins for different IDEs to generating the client-side implementation. 
SOA: Stands for Service Oriented Architecture
Includes all of the programming with web services concepts and architecture. Imagine that you want to implement a large-scale application. One practice can be having some different services, called micro-services and the whole application mechanism would be calling needed web service at the right time.
Both REST and SOAP web services are kind of SOA.
JSON: Stands for javascript Object Notation 
when you serialize an object for javascript the type of object format is JSON.
imagine that you have the human class : 
class Human{
 string Name;
 string Family;
 int Age;
}

and you have some instances from this class :
Human h1 = new Human(){
  Name='Saman',
  Family='Gholami',
  Age=26
}

when you serialize the h1 object to JSON the result is :
  [h1:{Name:'saman',Family:'Gholami',Age:'26'}, ...]

javascript can evaluate this format by eval() function and make an associative array from this JSON string. This one is different concept in comparison to other concepts I described formerly.


"column not allowed here" error in INSERT statement
 
What you missed is " " in postcode because it is a varchar. 
There are two ways of inserting.
When you created a table Table created. and you add a row just after creating it, you can use the following method. 
INSERT INTO table_name
VALUES (value1,value2,value3,...);

1 row created.
You've added so many tables, or it is saved and you are reopening it, you need to mention the table's column name too or else it will display the same error. 
ERROR at line 2:
ORA-00984: column not allowed here


INSERT INTO table_name (column1,column2,column3,...)
VALUES (value1,value2,value3,...);

1 row created.


Is it a bad practice to use break in a for loop?
 
On MISRA 98 rules, that is used on my company in C dev, break statement shall not be used...
Edit : Break is allowed in MISRA '04


Grep regex NOT containing string
 
(?<!1\.2\.3\.4).*Has exploded

You need to run this with -P to have negative lookbehind (Perl regular expression), so the command is:
grep -P '(?<!1\.2\.3\.4).*Has exploded' test.log

Try this. It uses negative lookbehind to ignore the line if it is preceeded by 1.2.3.4. Hope that helps!


How to launch Windows Scheduler by command-line?
 
You might want to have look at simple command line scheduler "at":

C:\Documents and Settings\mahendra.patil>at/?

The AT command schedules commands and programs to run on a computer at
a specified time and date. The Schedule service must be running to use
the AT command.
AT [\\computername] [ [id] [/DELETE] | /DELETE [/YES]]
AT [\\computername] time [/INTERACTIVE]
    [ /EVERY:date[,...] | /NEXT:date[,...]] "command"

\computername Specifies a remote computer. Commands are scheduled on the
local computer if this parameter is omitted.

id Is an identification number assigned to a scheduled
command.

/delete Cancels a scheduled command. If id is omitted, all the
scheduled commands on the computer are canceled.

/yes Used with cancel all jobs command when no further
confirmation is desired.

time Specifies the time when command is to run.

/interactive Allows the job to interact with the desktop of the user
who is logged on at the time the job runs.

/every:date[,...] Runs the command on each specified day(s) of the week or
month. If date is omitted, the current day of the month
is assumed.

/next:date[,...] Runs the specified command on the next occurrence of the
day (for example, next Thursday). If date is omitted, the
current day of the month is assumed.

"command" Is the Windows NT command, or batch program to be run.



.NET Global exception handler in console application
 
What you are trying should work according to the MSDN doc's for .Net 2.0. You could also try a try/catch right in main around your entry point for the console app.
static void Main(string[] args)
{
    try
    {
        // Start Working
    }
    catch (Exception ex)
    {
        // Output/Log Exception
    }
    finally
    {
        // Clean Up If Needed
    }
}

And now your catch will handle anything not caught (in the main thread). It can be graceful and even restart where it was if you want, or you can just let the app die and log the exception. You woul add a finally if you wanted to do any clean up. Each thread will require its own high level exception handling similar to the main.
Edited to clarify the point about threads as pointed out by BlueMonkMN and shown in detail in his answer.


Is null check needed before calling instanceof?
 
No. Java literal null is not an instance of any class. Therefore it can not be an instanceof any class. instanceof will return either false or true therefore the <referenceVariable> instanceof <SomeClass> returns false when referenceVariable value is null.


How do I know if jQuery has an Ajax request pending?
 
$.active returns the number of active Ajax requests.
More info here


Javascript date.getYear() returns 111 in 2011?
 
https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Date/getYear

getYear is no longer used and has been replaced by the getFullYear method.
The getYear method returns the year minus 1900; thus:

For years greater than or equal to 2000, the value returned by getYear is 100 or greater. For example, if the year is 2026, getYear returns 126.
For years between and including 1900 and 1999, the value returned by getYear is between 0 and 99. For example, if the year is 1976, getYear returns 76.
For years less than 1900, the value returned by getYear is less than 0. For example, if the year is 1800, getYear returns -100.
To take into account years before and after 2000, you should use getFullYear instead of getYear so that the year is specified in full.




Best way to use multiple SSH private keys on one client
 
You can instruct ssh to try multiple keys in succession when connecting. Here's how:
$ cat ~/.ssh/config
IdentityFile ~/.ssh/id_rsa
IdentityFile ~/.ssh/id_rsa_old
IdentityFile ~/.ssh/id_ed25519
# ... and so on

$ ssh server.example.com -v
....
debug1: Next authentication method: publickey
debug1: Trying private key: /home/example/.ssh/id_rsa
debug1: read PEM private key done: type RSA
debug1: Authentications that can continue: publickey
debug1: Trying private key: /home/example/.ssh/id_rsa_old
debug1: read PEM private key done: type RSA
....
[server ~]$

This way you don't have to specify what key works with which server. It'll just use the first working key.
Also you would only enter a passphrase if a given server is willing to accept the key. As seen above ssh didn't try to ask for a password for .ssh/id_rsa even if it had one.
Surely it doesn't outbeat a per-server configuration as in other answers, but at least you won't have to add a configuration for all and every server you connect to!


Display Records From MySQL Database using JTable in Java
 
Below is a class which will accomplish the very basics of what you want to do when reading data from a MySQL database into a JTable in Java.
import java.awt.*;
import java.sql.*;
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;

public class TableFromMySqlDatabase extends JFrame
{
    public TableFromMySqlDatabase()
    {
        ArrayList columnNames = new ArrayList();
        ArrayList data = new ArrayList();

        //  Connect to an MySQL Database, run query, get result set
        String url = "jdbc:mysql://localhost:3306/yourdb";
        String userid = "root";
        String password = "sesame";
        String sql = "SELECT * FROM animals";

        // Java SE 7 has try-with-resources
        // This will ensure that the sql objects are closed when the program 
        // is finished with them
        try (Connection connection = DriverManager.getConnection( url, userid, password );
            Statement stmt = connection.createStatement();
            ResultSet rs = stmt.executeQuery( sql ))
        {
            ResultSetMetaData md = rs.getMetaData();
            int columns = md.getColumnCount();

            //  Get column names
            for (int i = 1; i <= columns; i++)
            {
                columnNames.add( md.getColumnName(i) );
            }

            //  Get row data
            while (rs.next())
            {
                ArrayList row = new ArrayList(columns);

                for (int i = 1; i <= columns; i++)
                {
                    row.add( rs.getObject(i) );
                }

                data.add( row );
            }
        }
        catch (SQLException e)
        {
            System.out.println( e.getMessage() );
        }

        // Create Vectors and copy over elements from ArrayLists to them
        // Vector is deprecated but I am using them in this example to keep 
        // things simple - the best practice would be to create a custom defined
        // class which inherits from the AbstractTableModel class
        Vector columnNamesVector = new Vector();
        Vector dataVector = new Vector();

        for (int i = 0; i < data.size(); i++)
        {
            ArrayList subArray = (ArrayList)data.get(i);
            Vector subVector = new Vector();
            for (int j = 0; j < subArray.size(); j++)
            {
                subVector.add(subArray.get(j));
            }
            dataVector.add(subVector);
        }

        for (int i = 0; i < columnNames.size(); i++ )
            columnNamesVector.add(columnNames.get(i));

        //  Create table with database data    
        JTable table = new JTable(dataVector, columnNamesVector)
        {
            public Class getColumnClass(int column)
            {
                for (int row = 0; row < getRowCount(); row++)
                {
                    Object o = getValueAt(row, column);

                    if (o != null)
                    {
                        return o.getClass();
                    }
                }

                return Object.class;
            }
        };

        JScrollPane scrollPane = new JScrollPane( table );
        getContentPane().add( scrollPane );

        JPanel buttonPanel = new JPanel();
        getContentPane().add( buttonPanel, BorderLayout.SOUTH );
    }

    public static void main(String[] args)
    {
        TableFromMySqlDatabase frame = new TableFromMySqlDatabase();
        frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
        frame.pack();
        frame.setVisible(true);
    }
}

In the NetBeans IDE which you are using - you will need to add the MySQL JDBC Driver in Project Properties as I display here:

Otherwise the code will throw an SQLException stating that the driver cannot be found.
Now in my example, yourdb is the name of the database and animals is the name of the table that I am performing a query against.
Here is what will be output:

Parting note: 
You stated that you were a novice and needed some help understanding some of the basic classes and concepts of Java. I will list a few here, but remember you can always browse the docs on Oracle's site.

ArrayList 
Vector
Try-with-resources statement



includes() not working in all browsers
 
import 'core-js/es7/array' 

into polyfill.ts worked for me.


Using .Select and .Where in a single LINQ statement
 

Did you add the Select() after the Where() or before?
You should add it after, because of the concurrency logic:
 1 Take the entire table  
 2 Filter it accordingly  
 3 Select only the ID's  
 4 Make them distinct.  

If you do a Select first, the Where clause can only contain the ID attribute because all other attributes have already been edited out.
Update: For clarity, this order of operators should work:
db.Items.Where(x=> x.userid == user_ID).Select(x=>x.Id).Distinct();

Probably want to add a .toList() at the end but that's optional :)



"undefined" function declared in another file?
 
I just had the same problem in GoLand (which is Intellij IDEA for Go) and worked out a solution. You need to change the Run kind from File to Package or Directory. You can choose this from a drop-down if you go into Run/Edit Configurations.
Eg: for package ~/go/src/a_package, use a Package path of a_package and a Directory of ~/go/src/a_package and Run kind of Package or Directory.


Sending a notification from a service in Android
 
If none of these work, try getBaseContext(), instead of context or this.


Find and extract a number from a string
 
use regular expression ...
Regex re = new Regex(@"\d+");
Match m = re.Match("test 66");

if (m.Success)
{
    Console.WriteLine(string.Format("RegEx found " + m.Value + " at position " + m.Index.ToString()));
}
else
{
    Console.WriteLine("You didn't enter a string containing a number!");
}



Python: No acceptable C compiler found in $PATH when installing python
 
Issue :

configure: error: no acceptable C compiler found in $PATH

Fixed the issue by executing the following command:
yum install gcc

to install gcc.


Maximum value of maxRequestLength?
 
These two settings worked for me to upload 1GB mp4 videos.
<system.web>
    <httpRuntime maxRequestLength="2097152" requestLengthDiskThreshold="2097152" executionTimeout="240"/>
</system.web>
<system.webServer>
    <security>
        <requestFiltering>
            <requestLimits maxAllowedContentLength="2147483648" />
        </requestFiltering>
    </security>
</system.webServer>



Upgrade Node.js to the latest version on Mac OS
 
Go to http://nodejs.org and download and run the installer.
It works now - for me at least. 


Immutable vs Mutable types
 
You have to understand that Python represents all its data as objects. Some of these objects like lists and dictionaries are mutable, meaning you can change their content without changing their identity. Other objects like integers, floats, strings and tuples are objects that can not be changed.
An easy way to understand that is if you have a look at an objects ID. 
Below you see a string that is immutable. You can not change its content. It will raise a TypeError if you try to change it. Also, if we assign new content, a new object is created instead of the contents being modified.
>>> s = "abc"
>>>id(s)
4702124
>>> s[0] 
'a'
>>> s[0] = "o"
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'str' object does not support item assignment
>>> s = "xyz"
>>>id(s)
4800100
>>> s += "uvw"
>>>id(s)
4800500

You can do that with a list and it will not change the objects identity
>>> i = [1,2,3]
>>>id(i)
2146718700
>>> i[0] 
1
>>> i[0] = 7
>>> id(i)
2146718700

To read more about Python's data model you could have a look at the Python language reference:

Python 2 datamodel
Python 3 datamodel



Laravel PDOException SQLSTATE[HY000] [1049] Unknown database 'forge'
 
clear your Cache php artisan cache:clear and then restart your server php artisan serve 127.0.0.1:8000


How does C#'s random number generator work?
 
You can use Random.Next(int maxValue):

Return:
A 32-bit signed integer greater than or equal to zero, and less than
maxValue; that is, the range of return values ordinarily includes zero
but not maxValue. However, if maxValue equals zero, maxValue is
returned.

var r = new Random();
// print random integer >= 0 and  < 100
Console.WriteLine(r.Next(100));

For this case however you could use Random.Next(int minValue, int maxValue), like this:
// print random integer >= 1 and < 101
Console.WriteLine(r.Next(1, 101);)
// or perhaps (if you have this specific case)
Console.WriteLine(r.Next(100) + 1);



How to integrate sourcetree for gitlab
 
It worked for me, but only with ssh key and not with username and password.
After i added the ssh key to sourcetree, i changed the settings under Tools -> Options -> SSH-Client to work with PuTTY/Plink.
I run into trouble after i added the ssh key, because i forgot to restart sourceTree. "this is necessary so that there is an instance of ssh-agent running that SourceTree can talk to with your key loaded."
See here:
https://answers.atlassian.com/questions/189412/sourcetree-with-gitlab-ssh-not-working


How do I turn off Unicode in a VC++ project?
 
None of the above solutions worked for me.
But 
#include <Windows.h>

worked fine.


Query-string encoding of a Javascript Object
 
This one skips null/undefined values
export function urlEncodeQueryParams(data) {
    const params = Object.keys(data).map(key => data[key] ? `${encodeURIComponent(key)}=${encodeURIComponent(data[key])}` : '');
    return params.filter(value => !!value).join('&');
}



Add CSS box shadow around the whole DIV
 
Use this below code
 border:2px soild #eee;

 margin: 15px 15px;
 -webkit-box-shadow: 2px 3px 8px #eee;
-moz-box-shadow: 2px 3px 8px #eee;
box-shadow: 2px 3px 8px #eee;

Explanation:-
box-shadow requires you to set the horizontal & vertical offsets, you can then optionally set the blur and colour, you can also choose to have the shadow inset instead of the default outset. Colour can be defined as hex or rgba.
box-shadow : inset/outset h-offset v-offset blur spread color; 
Explanation of the values... 
inset/outset -- whether the shadow is inside or outside the box. If not specified it will default to outset.
h-offset -- the horizontal offset of the shadow (required value)
v-offset -- the vertical offset of the shadow (required value)
blur -- as it says, the blur of the shadow
spread -- moves the shadow away from the box equally on all sides. A positive value causes the shadow to expand, negative causes it to contract. Though this value isn't often used, it is useful with multiple shadows. 
color -- as it says, the color of the shadow
Usage
box-shadow:2px 3px 8px #eee; a gray shadow with a horizontal outset of 2px, vertical of 3px and a blur of 8px


PHP & localStorage;
 
localStorage is something that is kept on the client side. There is no data transmitted to the server side.
You can only get the data with JavaScript and you can send it to the server side with Ajax.


Implementing a simple file download servlet
 
And to send a largFile
byte[] pdfData = getPDFData();

String fileType = "";

res.setContentType("application/pdf");

httpRes.setContentType("application/.pdf");
httpRes.addHeader("Content-Disposition", "attachment; filename=IDCards.pdf");
httpRes.setStatus(HttpServletResponse.SC_OK);
OutputStream out = res.getOutputStream();
System.out.println(pdfData.length);
         
out.write(pdfData);
System.out.println("sendDone");
out.flush();



High Quality Image Scaling Library
 
Tested libraries like Imagemagick and GD are available for .NET
You could also read up on things like bicubic interpolation and write your own.


Vim: faster way to select blocks of text in visual mode
 
v35G will select everything from the cursor up to line 35.
v puts you in select mode, 35 specifies the line number that you want to G go to.
You could also use v} which will select everything up to the beginning of the next paragraph.


How to increase image size of pandas.DataFrame.plot in jupyter notebook?
 
Try figsize param in df.plot(figsize=(width,height)):
df = pd.DataFrame({"a":[1,2],"b":[1,2]})
df.plot(figsize=(3,3));


df = pd.DataFrame({"a":[1,2],"b":[1,2]})
df.plot(figsize=(5,3));


The size in figsize=(5,3) is given in inches per (width, height)
https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.plot.html


How to destroy a DOM element with jQuery?
 
Not sure if it's just me, but using .remove() doesn't seem to work if you are selecting by an id.
Ex: $("#my-element").remove();
I had to use the element's class instead, or nothing happened.
Ex: $(".my-element").remove();


Right to Left support for Twitter Bootstrap 3
 
I found this very helpful, check it: http://cdnjs.com/libraries/bootstrap-rtl 


How to capture the android device screen content?
 
You can try the following library: Android Screenshot Library (ASL) enables to programmatically capture screenshots from Android devices without requirement of having root access privileges. Instead, ASL utilizes a native service running in the background, started via the Android Debug Bridge (ADB) once per device boot.


Can anyone confirm that phpMyAdmin AllowNoPassword works with MySQL databases?
 
$cfg['Servers'][$i]['AllowNoPassword'] = TRUE;

yes the above answer is correct, but it's not secure, you can login root user directlyinto phpMyAdmin.
If you want to create new user with password and give grant permission, execute the below command in MySQL on terminal,
Login into your server on terminal,
  # mysql

 mysql> GRANT ALL PRIVILEGES ON *.* TO  'user-name'@'%'  IDENTIFIED BY  'password'   REQUIRE NONE WITH GRANT OPTION MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0;



C# - Fill a combo box with a DataTable
 
Are you applying a RowFilter to your DefaultView later in the code? This could change the results returned.
I would also avoid using the string as the display member if you have a direct reference the the data column I would use the object properties:
mnuActionLanguage.ComboBox.DataSource = lTable.DefaultView;
mnuActionLanguage.ComboBox.DisplayMember = lName.ColumnName;
I have tried this with a blank form and standard combo, and seems to work for me.


Javascript: Unicode string to hex
 
Here is my take: these functions convert a UTF8 string to a proper HEX without the extra zeroes padding. A real UTF8 string has characters with 1, 2, 3 and 4 bytes length.
While working on this I found a couple key things that solved my problems:

str.split('') doesn't handle multi-byte characters like emojis correctly. The proper/modern way to handle this is with Array.from(str)
encodeURIComponent() and decodeURIComponent() are great tools to convert between string and hex. They are pretty standard, they handle UTF8 correctly.
(Most) ASCII characters (codes 0 - 127) don't get URI encoded, so they need to handled separately. But c.charCodeAt(0).toString(16) works perfectly for those

    function utf8ToHex(str) {
      return Array.from(str).map(c => 
        c.charCodeAt(0) < 128 ? c.charCodeAt(0).toString(16) : 
        encodeURIComponent(c).replace(/\%/g,'').toLowerCase()
      ).join('');
    },
    function hexToUtf8: function(hex) {
      return decodeURIComponent('%' + hex.match(/.{1,2}/g).join('%'));
    }

Demo: https://jsfiddle.net/lyquix/k2tjbrvq/


Multiple selector chaining in jQuery?
 
You should be able to use:
$('#Edit.myClass, #Create.myClass').plugin({options here});

jQuery | Multiple Selectors


How to tell when UITableView has completed ReloadData?
 
You can use performBatchUpdates function of uitableview
Here is how you can achieve
self.tableView.performBatchUpdates({

      //Perform reload
        self.tableView.reloadData()
    }) { (completed) in

        //Reload Completed Use your code here
    }



Best way to detect when a user leaves a web page?
 
I know this question has been answered, but in case you only want something to trigger when the actual BROWSER is closed, and not just when a pageload occurs, you can use this code:
window.onbeforeunload = function (e) {
        if ((window.event.clientY < 0)) {
            //window.localStorage.clear();
            //alert("Y coords: " + window.event.clientY)
        }
};

In my example, I am clearing local storage and alerting the user with the mouses y coords, only when the browser is closed, this will be ignored on all page loads from within the program.


Prevent typing non-numeric in input type number
 
I will add MetaKey as well, as I am using MacOS
input.addEventListener("keypress", (e) => {
    const key = e.key;
    if (!(e.metaKey || e.ctrlKey) && key.length === 1 && !/\d\./.test(key)) {
        e.preventDefault();
    }
}

Or, you can try !isNaN(parseFloat(key))


What is an efficient way to implement a singleton pattern in Java?
 
I would say an enum singleton.
Singleton using an enum in Java is generally a way to declare an enum singleton. An enum singleton may contain instance variables and instance methods. For simplicity's sake, also note that if you are using any instance method then you need to ensure thread safety of that method if at all it affects the state of object.
The use of an enum is very easy to implement and has no drawbacks regarding serializable objects, which have to be circumvented in the other ways.
/**
* Singleton pattern example using a Java Enum
*/
public enum Singleton {
    INSTANCE;
    public void execute (String arg) {
        // Perform operation here
    }
}

You can access it by Singleton.INSTANCE, and it is much easier than calling the getInstance() method on Singleton.

1.12 Serialization of Enum Constants
Enum constants are serialized differently than ordinary serializable or externalizable objects. The serialized form of an enum constant consists solely of its name; field values of the constant are not present in the form. To serialize an enum constant, ObjectOutputStream writes the value returned by the enum constant's name method. To deserialize an enum constant, ObjectInputStream reads the constant name from the stream; the deserialized constant is then obtained by calling the java.lang.Enum.valueOf method, passing the constant's enum type along with the received constant name as arguments. Like other serializable or externalizable objects, enum constants can function as the targets of back references appearing subsequently in the serialization stream.
The process by which enum constants are serialized cannot be customized: any class-specific writeObject, readObject, readObjectNoData, writeReplace, and readResolve methods defined by enum types are ignored during serialization and deserialization. Similarly, any serialPersistentFields or serialVersionUID field declarations are also ignored--all enum types have a fixed serialVersionUID of 0L. Documenting serializable fields and data for enum types is unnecessary, since there is no variation in the type of data sent.
Quoted from Oracle documentation

Another problem with conventional Singletons are that once you implement the Serializable interface, they no longer remain singleton because the readObject() method always return a new instance, like a constructor in Java. This can be avoided by using readResolve() and discarding the newly created instance by replacing with a singleton like below:
 // readResolve to prevent another instance of Singleton
 private Object readResolve(){
     return INSTANCE;
 }

This can become even more complex if your singleton class maintains state, as you need to make them transient, but with in an enum singleton, serialization is guaranteed by the JVM.

Good Read

Singleton Pattern
Enums, Singletons and Deserialization
Double-checked locking and the Singleton pattern



Open a Web Page in a Windows Batch FIle
 
Unfortunately, the best method to approach this is to use Internet Explorer as it's a browser that is guaranteed to be on Windows based machines. This will also bring compatibility of other users which might have alternative browsers such as Firefox, Chrome, Opera..etc,
start "iexplore.exe" http://www.website.com



How to generate .json file with PHP?
 
Use PHP's json methods to create the json then write it to a file with fwrite.


Why is Event.target not Element in Typescript?
 
It doesn't inherit from Element because not all event targets are elements.
From MDN:

Element, document, and window are the most common event targets, but other objects can be event targets too, for example XMLHttpRequest, AudioNode, AudioContext, and others.

Even the KeyboardEvent you're trying to use can occur on a DOM element or on the window object (and theoretically on other things), so right there it wouldn't make sense for evt.target to be defined as an Element.
If it is an event on a DOM element, then I would say that you can safely assume evt.target. is an Element. I don't think this is an matter of cross-browser behavior. Merely that EventTarget is a more abstract interface than Element.
Further reading: https://typescript.codeplex.com/discussions/432211


How can I resolve the error: "The command [...] exited with code 1"?
 
I had the same issue. Tried all the above answers. It was actually complained about a .dll file. I clean the project in Visual Studio but the .dll file still remains, so I deleted in manually from the bin folder and it worked.


What does an exclamation mark before a cell reference mean?
 
If you use that forumla in the name manager you are creating a dynamic range which uses "this sheet" in place of a specific sheet.
As Jerry says, Sheet1!A1 refers to cell A1 on Sheet1. If you create a named range and omit the Sheet1 part you will reference cell A1 on the currently active sheet. (omitting the sheet reference and using it in a cell formula will error).
edit: my bad, I was using $A$1 which will lock it to the A1 cell as above, thanks pnuts :p


JavaScript chop/slice/trim off last character in string
 
debris = string.split("_") //explode string into array of strings indexed by "_"

debris.pop(); //pop last element off the array (which you didn't want)

result = debris.join("_"); //fuse the remainng items together like the sun



How to use onSavedInstanceState example please
 
Store information:
static final String PLAYER_SCORE = "playerScore";
static final String PLAYER_LEVEL = "playerLevel";

@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
    // Save the user's current game state
    savedInstanceState.putInt(PLAYER_SCORE, mCurrentScore);
    savedInstanceState.putInt(PLAYER_LEVEL, mCurrentLevel);

// Always call the superclass so it can save the view hierarchy state
super.onSaveInstanceState(savedInstanceState);
}

If you don't want to restore information in your onCreate-Method:
Here are the examples: Recreating an Activity

Instead of restoring the state during onCreate() you may choose to implement onRestoreInstanceState(), which the system calls after the onStart() method. The system calls onRestoreInstanceState() only if there is a saved state to restore, so you do not need to check whether the Bundle is null

public void onRestoreInstanceState(Bundle savedInstanceState) {
// Always call the superclass so it can restore the view hierarchy
super.onRestoreInstanceState(savedInstanceState);

// Restore state members from saved instance
mCurrentScore = savedInstanceState.getInt(PLAYER_SCORE);
mCurrentLevel = savedInstanceState.getInt(PLAYER_LEVEL);
}



Rails: Address already in use - bind(2) (Errno::EADDRINUSE)
 
It might be old but in my case, it was because of docker. Hope it will help others.


How do I access store state in React Redux?
 
Import connect from react-redux and use it to connect the component with the state connect(mapStates,mapDispatch)(component)
import React from "react";
import { connect } from "react-redux";


const MyComponent = (props) => {
    return (
      <div>
        <h1>{props.title}</h1>
      </div>
    );
  }
}

Finally you need to map the states to the props to access them with this.props 
const mapStateToProps = state => {
  return {
    title: state.title
  };
};
export default connect(mapStateToProps)(MyComponent);

Only the states that you map will be accessible via props
Check out this answer: https://stackoverflow.com/a/36214059/4040563
For further reading : https://medium.com/@atomarranger/redux-mapstatetoprops-and-mapdispatchtoprops-shorthand-67d6cd78f132


How to prevent scanf causing a buffer overflow in C?
 
If you are using gcc, you can use the GNU-extension a specifier to have scanf() allocate memory for you to hold the input:
int main()
{
  char *str = NULL;

  scanf ("%as", &str);
  if (str) {
      printf("\"%s\"\n", str);
      free(str);
  }
  return 0;
}

Edit: As Jonathan pointed out, you should consult the scanf man pages as the specifier might be different (%m) and you might need to enable certain defines when compiling.


Static method in a generic class?
 
I think this syntax has not been mentionned yet (in the case you want a method without arguments) :
class Clazz {
  static <T> T doIt() {
    // shake that booty
  }
}

And the call :
String str = Clazz.<String>doIt();

Hope this help someone.


Django Forms: if not valid, show form with error message
 
This answer is correct but has a problem: fields not defined.
If you have more then one field, you can not recognize which one has error.
with this change you can display field name:
{% if form.errors %}
    {% for field in form %}
        {% for error in field.errors %}
            <div class="alert alert-danger">
                <strong>{{ field.label }}</strong><span>{{ error|escape }}</strong>
            </div>
        {% endfor %}
    {% endfor %}
    {% for error in form.non_field_errors %}
        <div class="alert alert-danger">
            <strong>{{ error|escape }}</strong>
        </div>
    {% endfor %}
{% endif %}
 



How do you run a SQL Server query from PowerShell?
 
Here's an example I found on this blog.
$cn2 = new-object system.data.SqlClient.SQLConnection("Data Source=machine1;Integrated Security=SSPI;Initial Catalog=master");
$cmd = new-object system.data.sqlclient.sqlcommand("dbcc freeproccache", $cn2);
$cn2.Open();
if ($cmd.ExecuteNonQuery() -ne -1)
{
    echo "Failed";
}
$cn2.Close();

Presumably you could substitute a different TSQL statement where it says dbcc freeproccache.


SQL Server : check if variable is Empty or NULL for WHERE clause
 
Old post but worth a look for someone who stumbles upon like me 
ISNULL(NULLIF(ColumnName, ' '), NULL) IS NOT NULL

ISNULL(NULLIF(ColumnName, ' '), NULL) IS NULL



How to add a footer to the UITableView?
 
I know that this is a pretty old question but I've just met same issue. I don't know exactly why but it seems that tableFooterView can be only an instance of UIView (not "kind of" but "is member")... So in my case I've created new UIView object (for example wrapperView) and add my custom subview to it... In your case, chamge your code from:
CGRect footerRect = CGRectMake(0, 0, 320, 40);
UILabel *tableFooter = [[UILabel alloc] initWithFrame:footerRect];
tableFooter.textColor = [UIColor blueColor];
tableFooter.backgroundColor = [self.theTable backgroundColor];
tableFooter.opaque = YES;
tableFooter.font = [UIFont boldSystemFontOfSize:15];
tableFooter.text = @"test";
self.theTable.tableFooterView = tableFooter;
[tableFooter release];

to:
CGRect footerRect = CGRectMake(0, 0, 320, 40);
UIView *wrapperView = [[UIView alloc] initWithFrame:footerRect];

UILabel *tableFooter = [[UILabel alloc] initWithFrame:footerRect];
tableFooter.textColor = [UIColor blueColor];
tableFooter.backgroundColor = [self.theTable backgroundColor];
tableFooter.opaque = YES;
tableFooter.font = [UIFont boldSystemFontOfSize:15];
tableFooter.text = @"test";

[wrapperView addSubview:tableFooter];

self.theTable.tableFooterView = wrapperView;
[wrapperView release];
[tableFooter release];

Hope it helps. It works for me.


Custom Adapter for List View
 
You can take a look at this sample in the official ApiDemos. It shows how to extend BaseAdapter and apply it to a ListView. After that, just look at the reference for BaseAdapter and try to understand what each method does (including the inherited ones) and when/how to use it.
Also, Google is your friend :).


Status bar and navigation bar appear over my view's bounds in iOS 7
 
I had the same issue with my app by iPads (armv7, armv7s, amr64) only by presenting another UIViewController and after dismiss them goes nav bar under status bar...
I spend a lot of time to find any solution for that. I'm using storyboard and in InterfaceBuilder for UIViewController which makes terrible i set Presentation from FullScreen -> Current Context and it fix this issue. It works in my app only for iPads => iOS8.0 (testing with iOS8.1) and for iPads with iOS 7.1 not work!! 


Extract XML Value in bash script
 
XMLStarlet or another XPath engine is the correct tool for this job.
For instance, with data.xml containing the following:
<root>
  <item> 
    <title>15:54:57 - George:</title>
    <description>Diane DeConn? You saw Diane DeConn!</description> 
  </item> 
  <item> 
    <title>15:55:17 - Jerry:</title> 
    <description>Something huh?</description>
  </item>
</root>

...you can extract only the first title with the following:
xmlstarlet sel -t -m '//title[1]' -v . -n <data.xml

Trying to use sed for this job is troublesome. For instance, the regex-based approaches won't work if the title has attributes; won't handle CDATA sections; won't correctly recognize namespace mappings; can't determine whether a portion of the XML documented is commented out; won't unescape attribute references (such as changing Brewster &amp; Jobs to Brewster & Jobs), and so forth.


How do I check which version of NumPy I'm using?
 
In a Python shell:
>>> help()
help> numpy



How to replace a character by a newline in Vim
 
You need to use:
:%s/,/^M/g

To get the ^M character, press Ctrl + v followed by Enter.


Are the days of passing const std::string & as a parameter over?
 
See “Herb Sutter "Back to the Basics! Essentials of Modern C++ Style”. Among other topics, he reviews the parameter passing advice that’s been given in the past, and new ideas that come in with C++11 and specifically looks at the idea of passing strings by value.

The benchmarks show that passing std::strings by value, in cases where the function will copy it in anyway, can be significantly slower!
This is because you are forcing it to always make a full copy (and then move into place), while the const& version will update the old string which may reuse the already-allocated buffer.
See his slide 27: For “set” functions, option 1 is the same as it always was. Option 2 adds an overload for rvalue reference, but this gives a combinatorial explosion if there are multiple parameters.
It is only for “sink” parameters where a string must be created (not have its existing value changed) that the pass-by-value trick is valid. That is, constructors in which the parameter directly initializes the member of the matching type.
If you want to see how deep you can go in worrying about this, watch Nicolai Josuttis’s presentation and good luck with that (“Perfect — Done!” n times after finding fault with the previous version. Ever been there?)

This is also summarized as ?F.15 in the Standard Guidelines.


Why is __init__() always called after __new__()?
 
__new__ is static class method, while __init__ is instance method.
__new__ has to create the instance first, so __init__ can initialize it. Note that __init__ takes self as parameter. Until you create instance there is no self.
Now, I gather, that you're trying to implement singleton pattern in Python. There are a few ways to do that.
Also, as of Python 2.6, you can use class decorators. 
def singleton(cls):
    instances = {}
    def getinstance():
        if cls not in instances:
            instances[cls] = cls()
        return instances[cls]
    return getinstance

@singleton
class MyClass:
  ...



How to close TCP and UDP ports via windows command line
 
wkillcx is a reliable windows command line tool for killing tcp connections from the command line that hasn't been mentioned. It does have issues with servers with large number of connections sometimes though. I sometimes use tcpview for interactive kills but wkillcx can be used in scripts.


External VS2013 build error "error MSB4019: The imported project <path> was not found"
 
you will find 
C:\Program Files  (x86)\MSBuild\Microsoft\VisualStudio\v11.0\WebApplications\Microsoft.WebApplication.targets 

in csproj file for which this error is appearing.
Just remove this from csproj and then build.


How to insert a line break <br> in markdown
 
Try adding 2 spaces (or a backslash \) after the first line:
[Name of link](url)
My line of text\

Visually:
[Name of link](url)<space><space>
My line of text\

Output:
<p><a href="url">Name of link</a><br>
My line of text<br></p>



java.lang.NoClassDefFoundError: Could not initialize class XXX
 
I had the same exception, this is how I solved the problem:
Preconditions:

Junit class (and test), that extended another class.
ApplicationContext initialized using spring, that init the project.
The Application context was initialized in @Before method

Solution:
Init the application context from @BeforeClass method, since the parent class also required some classes that were initialized from within the application context.
Hope this will help.


How do I replace text inside a div element?
 
You can simply use:
fieldNameElement.innerHTML = "My new text!";



What does the "assert" keyword do?
 
If you launch your program with -enableassertions (or -ea for short) then this statement
assert cond;

is equivalent to
if (!cond)
    throw new AssertionError();

If you launch your program without this option, the assert statement will have no effect.
For example, assert d >= 0 && d <= s.length();, as posted in your question, is equivalent to
if (!(d >= 0 && d <= s.length()))
    throw new AssertionError();

(If you launched with -enableassertions that is.)

Formally, the Java Language Specification: 14.10. The assert Statement says the following:

14.10. The assert Statement

An assertion is an assert statement containing a boolean expression. An assertion is either enabled or disabled. If the assertion is enabled, execution of the assertion causes evaluation of the boolean expression and an error is reported if the expression evaluates to false. If the assertion is disabled, execution of the assertion has no effect whatsoever.

Where "enabled or disabled" is controlled with the -ea switch and "An error is reported" means that an AssertionError is thrown.

And finally, a lesser known feature of assert:
You can append : "Error message" like this:
assert d != null : "d is null";

to specify what the error message of the thrown AssertionError should be.

This post has been rewritten as an article here.


How to execute a command in a remote computer?
 
You could use SysInternal's PsExec.


remove objects from array by object property
 
var arrayOfObjects = [{id:'abc',name:'oh'}, // delete me
                      {id:'efg',name:'em'}, // delete me
                      {id:'hij',name:'ge'}] // all that should remain

as per your answer will be like this. when you click some particular object send the index in the param for the delete me function. This simple code will work like charm.
function deleteme(i){
    if (i > -1) {
      arrayOfObjects.splice(i, 1);
    }
}



jQuery table sort
 
I love this accepted answer, however, rarely do you get requirements to sort html and not have to add icons indicating the sorting direction. I took the accept answer's usage example and fixed that quickly by simply adding bootstrap to my project, and adding the following code:
<div></div>
inside each <th> so that you have a place to set the icon.
setIcon(this, inverse);
from the accepted answer's Usage, below the line:
th.click(function () {
and by adding the setIcon method:
function setIcon(element, inverse) {

        var iconSpan = $(element).find('div');

        if (inverse == false) {
            $(iconSpan).removeClass();
            $(iconSpan).addClass('icon-white icon-arrow-up');
        } else {
            $(iconSpan).removeClass();
            $(iconSpan).addClass('icon-white icon-arrow-down');
        }
        $(element).siblings().find('div').removeClass();
    }

Here is a demo. --You need to either run the demo in Firefox or IE, or disable Chrome's MIME-type checking for the demo to work. It depends on the sortElements Plugin, linked by the accepted answer, as an external resource. Just a heads up!


How to create a service running a .exe file on Windows 2012 Server?
 
You can just do that too, it seems to work well too.
sc create "Servicename" binPath= "Path\To\your\App.exe" DisplayName= "My Custom Service"
You can open the registry and add a string named Description in your service's registry key to add a little more descriptive information about it. It will be shown in services.msc.


What is the difference between angular-route and angular-ui-router?
 
If you want to make use of nested views functionality implemented within ngRoute paradigm, try angular-route-segment - it aims to extend ngRoute rather than to replace it.


How to convert an NSString into an NSNumber
 
Try this 
NSNumber *yourNumber = [NSNumber numberWithLongLong:[yourString longLongValue]];

Note - I have used longLongValue as per my requirement. You can also use integerValue, longValue, or any other format depending upon your requirement. 


What data is stored in Ephemeral Storage of Amazon EC2 instance?
 
Anything that is not stored on an EBS volume that is mounted to the instance will be lost. 
For example, if you mount your EBS volume at /mystuff, then anything not in /mystuff will be lost. If you don't mount an ebs volume and save stuff on it, then I believe everything will be lost.
You can create an AMI from your current machine state, which will contain everything in your ephemeral storage. Then, when you launch a new instance based on that AMI it will contain everything as it is now.
Update: to clarify based on comments by mattgmg1990 and glenn bech:
Note that there is a difference between "stop" and "terminate". If you "stop" an instance that is backed by EBS then the information on the root volume will still be in the same state when you "start" the machine again. According to the documentation, "By default, the root device volume and the other Amazon EBS volumes attached when you launch an Amazon EBS-backed instance are automatically deleted when the instance terminates" but you can modify that via configuration.


Xcode is not currently available from the Software Update server
 
I got the same issue on MacOS Catalina.
I think I identified the root cause: I have switched the default Apple ID account and the new one was not activated as a Developer account. When I ran the xcode-select --install command, I got the same error as stated in the issue description.
After reading this post on stackoverflow, I went on https://developer.apple.com/downloads and I was asked to accept Developers terms. I think it enabled my account as a developer one. Then, I tried to run xcode-select --install again and it worked.


How to set HTML Auto Indent format on Sublime Text 3?
 
One option is to type [command] + [shift] + [p] (or the equivalent) and then type 'indentation'. The top result should be 'Indendtation: Reindent Lines'. Press [enter] and it will format the document. 
Another option is to install the Emmet plugin (http://emmet.io/), which will provide not only better formatting, but also a myriad of other incredible features. To get the output you're looking for using Sublime Text 3 with the Emmet plugin requires just the following:
p [tab][enter] Hello world!

When you type p [tab] Emmet expands it to:
<p></p>

Pressing [enter] then further expands it to:
<p>

</p>

With the cursor indented and on the line between the tags.
Meaning that typing text results in:
<p>
    Hello, world!
</p>



What is Common Gateway Interface (CGI)?
 
A CGI script is a console/shell program. In Windows, when you use a "Command Prompt" window, you execute console programs. When a web server executes a CGI script it provides input to the console/shell program using environment variables or "standard input". Standard input is like typing data into a console/shell program; in the case of a CGI script, the web server does the typing. The CGI script writes data out to "standard output" and that output is sent to the client (the web browser) as a HTML page. Standard output is like the output you see in a console/shell program except the web server reads it and sends it out.
A CGI script can be executed from a browser. The URI typically includes a query string that is provided to the CGI script. If the method is "get" then the query string is provided to the CGI Script in an environment variable called QUERY_STRING. If the method is "post" then the query string is provided to the CGI Script using standard input (the CGI Script reads the query string from standard input).
An early use of CGI scripts was to process forms. In the beginning of HTML, HTML forms typically had an "action" attribute and a button designated as the "submit" button. When the submit button is pushed the URI specified in the "action" attribute would be sent to the server with the data from the form sent as a query string. If the "action" specifies a CGI script then the CGI script would be executed and it then produces a HTML page.
RFC 3875 "The Common Gateway Interface (CGI)" partially defines CGI using C, as in saying that environment variables "are accessed by the C library routine getenv() or variable environ".
If you are developing a CGI script using C/C++ and use Microsoft Visual Studio to do that then you would develop a console program. 


how can I enable scrollbars on the WPF Datagrid?
 
This worked for me.
The key is to use * as Row height.
<Grid x:Name="grid">
        <Grid.RowDefinitions>
            <RowDefinition Height="60"/>
            <RowDefinition Height="*"/>
            <RowDefinition Height="10"/>
        </Grid.RowDefinitions>

        <TabControl  Grid.Row="1" x:Name="tabItem">
                <TabItem x:Name="ta" 
                        Header="List of all Clients">
                        <DataGrid Name="clientsgrid" AutoGenerateColumns="True" Margin="2" 
                         ></DataGrid>
                </TabItem>
        </TabControl>
    
    </Grid>



Using onBlur with JSX and React
 
There are a few problems here.
1: onBlur expects a callback, and you are calling renderPasswordConfirmError and using the return value, which is null.
2: you need a place to render the error.
3: you need a flag to track "and I validating", which you would set to true on blur. You can set this to false on focus if you want, depending on your desired behavior.
handleBlur: function () {
  this.setState({validating: true});
},
render: function () {
  return <div>
    ...
    <input
        type="password"
        placeholder="Password (confirm)"
        valueLink={this.linkState('password2')}
        onBlur={this.handleBlur}
     />
    ...
    {this.renderPasswordConfirmError()}
  </div>
},
renderPasswordConfirmError: function() {
  if (this.state.validating && this.state.password !== this.state.password2) {
    return (
      <div>
        <label className="error">Please enter the same password again.</label>
      </div>
    );
  }  
  return null;
},



How to change onClick handler dynamically?
 
The YUI example above should really be:
<script>
  YAHOO.util.Event.onDOMReady(function() {   
     Dom.get("foo").onclick =  function (){alert('foo');};
  });
</script>



What is a "static" function in C?
 
static function definitions will mark this symbol as internal. So it will not be visible for linking from outside, but only to functions in the same compilation unit, usually the same file.


How to echo JSON in PHP
 
if you want to encode or decode an array from or to JSON you can use these functions
$myJSONString = json_encode($myArray);
$myArray = json_decode($myString);

json_encode will result in a JSON string, built from an (multi-dimensional) array.
json_decode will result in an Array, built from a well formed JSON string
with json_decode you can take the results from the API and only output what you want, for example:
echo $myArray['payload']['ign'];



Check if a string matches a regex in Bash script
 
A good way to test if a string is a correct date is to use the command date:
if date -d "${DATE}" >/dev/null 2>&1
then
  # do what you need to do with your date
else
  echo "${DATE} incorrect date" >&2
  exit 1
fi

from comment: one can use formatting
if [ "2017-01-14" == $(date -d "2017-01-14" '+%Y-%m-%d') ] 



Why doesn't "System.out.println" work in Android?
 
Correction:

On the emulator and most devices System.out.println gets redirected to LogCat and printed using Log.i(). This may not be true on very old or custom Android versions. 
Original:

There is no console to send the messages to so the System.out.println messages get lost. In the same way this happens when you run a "traditional" Java application with javaw.
Instead, you can use the Android Log class:
Log.d("MyApp","I am here");

You can then view the log either in the Logcat view in Eclipse, or by running the following command:
adb logcat

It's good to get in to the habit of looking at logcat output as that is also where the Stack Traces of any uncaught Exceptions are displayed.

The first Entry to every logging call is the log tag which identifies the source of the log message. This is helpful as you can filter the output of the log to show just your messages. To make sure that you're consistent with your log tag it's probably best to define it once as a static final String somewhere.
Log.d(MyActivity.LOG_TAG,"Application started");

There are five one-letter methods in Log corresponding to the following levels:

e() - Error
w() - Warning
i() - Information
d() - Debug
v() - Verbose
wtf() - What a Terrible Failure

The documentation says the following about the levels:

Verbose should never be compiled into an application except during development. Debug logs are compiled in but stripped at runtime. Error, warning and info logs are always kept.



How do I specify the exit code of a console application in .NET?
 
3 options:

You can return it from Main if you declare your Main method to return int.
You can call Environment.Exit(code).
You can set the exit code using properties: Environment.ExitCode = -1;. This will be used if nothing else sets the return code or uses one of the other options above).

Depending on your application (console, service, web app, etc) different methods can be used.


Pass props in Link react-router
 
I had the same problem to show an user detail from my application.
You can do this:
<Link to={'/ideas/'+this.props.testvalue }>Create Idea</Link>

or 
<Link to="ideas/hello">Create Idea</Link>

and 
<Route name="ideas/:value" handler={CreateIdeaView} />

to get this via this.props.match.params.value at your CreateIdeaView class.
You can see this video that helped me a lot: https://www.youtube.com/watch?v=ZBxMljq9GSE


keytool error bash: keytool: command not found
 
In Windows 10, you need to add a double slash
./keytool -genkey -v -keystore c:\\Users\\USERNAME\\youralias.jks -storetype JKS -keyalg RSA -keysize 2048 -validity 10000 -alias youralias



What does `ValueError: cannot reindex from a duplicate axis` mean?
 
In my case, this error popped up not because of duplicate values, but because I attempted to join a shorter Series to a Dataframe: both had the same index, but the Series had fewer rows (missing the top few). The following worked for my purposes:
df.head()
                          SensA
date                           
2018-04-03 13:54:47.274   -0.45
2018-04-03 13:55:46.484   -0.42
2018-04-03 13:56:56.235   -0.37
2018-04-03 13:57:57.207   -0.34
2018-04-03 13:59:34.636   -0.33

series.head()
date
2018-04-03 14:09:36.577    62.2
2018-04-03 14:10:28.138    63.5
2018-04-03 14:11:27.400    63.1
2018-04-03 14:12:39.623    62.6
2018-04-03 14:13:27.310    62.5
Name: SensA_rrT, dtype: float64

df = series.to_frame().combine_first(df)

df.head(10)
                          SensA  SensA_rrT
date                           
2018-04-03 13:54:47.274   -0.45        NaN
2018-04-03 13:55:46.484   -0.42        NaN
2018-04-03 13:56:56.235   -0.37        NaN
2018-04-03 13:57:57.207   -0.34        NaN
2018-04-03 13:59:34.636   -0.33        NaN
2018-04-03 14:00:34.565   -0.33        NaN
2018-04-03 14:01:19.994   -0.37        NaN
2018-04-03 14:02:29.636   -0.34        NaN
2018-04-03 14:03:31.599   -0.32        NaN
2018-04-03 14:04:30.779   -0.33        NaN
2018-04-03 14:05:31.733   -0.35        NaN
2018-04-03 14:06:33.290   -0.38        NaN
2018-04-03 14:07:37.459   -0.39        NaN
2018-04-03 14:08:36.361   -0.36        NaN
2018-04-03 14:09:36.577   -0.37       62.2



Constants in Objective-C
 
The accepted (and correct) answer says that "you can include this [Constants.h] file... in the pre-compiled header for the project."
As a novice, I had difficulty doing this without further explanation -- here's how: In your YourAppNameHere-Prefix.pch file (this is the default name for the precompiled header in Xcode), import your Constants.h inside the #ifdef __OBJC__ block.
#ifdef __OBJC__
  #import <UIKit/UIKit.h>
  #import <Foundation/Foundation.h>
  #import "Constants.h"
#endif

Also note that the Constants.h and Constants.m files should contain absolutely nothing else in them except what is described in the accepted answer. (No interface or implementation).


Handling a timeout error in python sockets
 
I had enough success just catchig socket.timeout and socket.error; although socket.error can be raised for lots of reasons. Be careful.
import socket
import logging

hostname='google.com'
port=443

try:
    sock = socket.create_connection((hostname, port), timeout=3)

except socket.timeout as err:
    logging.error(err)

except socket.error as err:
    logging.error(err)



Java Set retain order?
 
From the javadoc for Set.iterator():

Returns an iterator over the elements in this set. The elements are returned in no particular order (unless this set is an instance of some class that provides a guarantee). 

And, as already stated by shuuchan, a TreeSet is an implemention of Set that has a guaranteed order:

The elements are ordered using their natural ordering, or by a Comparator provided at set creation time, depending on which constructor is used. 



Create an ArrayList of unique values
 
Solution #1: HashSet
A good solution to the immediate problem of reading a file into an ArrayList with a uniqueness constraint is to simply keep a HashSet of seen items. Before processing a line, we check that its key is not already in the set. If it isn't, we add the key to the set to mark it as finished, then add the line data to the result ArrayList. 
import java.util.*;
import java.io.*;

public class Main {
    public static void main(String[] args) 
        throws FileNotFoundException, IOException {

        String file = "prova.txt";
        ArrayList<String[]> data = new ArrayList<>();
        HashSet<String> seen = new HashSet<>();

        try (BufferedReader br = new BufferedReader(new FileReader(file))) {
            for (String line; (line = br.readLine()) != null;) {
                String[] split = line.split("\\s+");
                String key = split[0] + " " + split[1];

                if (!seen.contains(key)) {
                    data.add(Arrays.copyOfRange(split, 2, split.length));
                    seen.add(key);
                }
            }
        }

        for (String[] row : data) {
            System.out.println(Arrays.toString(row));
        }
    }
}


Solution #2: LinkedHashMap/LinkedHashSet
Since we have key-value pairs in this particular dataset, we could roll everything into a LinkedHashMap<String, ArrayList<String>> (see docs for LinkedHashMap) which preserves ordering but can't be indexed into (use-case driven decision, but amounts to the same strategy as above. ArrayList<String> or String[] is arbitrary here--it could be any data value). Note that this version makes it easy to preserve the most recently seen key rather than the oldest (remove the !data.containsKey(key) test).
import java.util.*;
import java.io.*;

public class Main {
    public static void main(String[] args) 
        throws FileNotFoundException, IOException {

        String file = "prova.txt";
        LinkedHashMap<String, ArrayList<String>> data = new LinkedHashMap<>();

        try (BufferedReader br = new BufferedReader(new FileReader(file))) {
            for (String line; (line = br.readLine()) != null;) {
                String[] split = line.split("\\s+");
                String key = split[0] + " " + split[1];

                if (!data.containsKey(key)) {
                    ArrayList<String> val = new ArrayList<>();
                    String[] sub = Arrays.copyOfRange(split, 2, split.length); 
                    Collections.addAll(val, sub);
                    data.put(key, val);
                }
            }
        }

        for (Map.Entry<String, ArrayList<String>> e : data.entrySet()) {
            System.out.println(e.getKey() + " => " + e.getValue());
        }
    }
}


Solution #3: ArrayListSet
The above examples represent pretty narrow use cases. Here's a sketch for a general ArrayListSet class, which maintains the usual list behavior (add/set/remove etc) while preserving uniqueness.
Basically, the class is an abstraction of solution #1 in this post (HashSet combined with ArrayList), but with a slightly different flavor (the data itself is used to determine uniqueness rather than a key, but it's a truer "ArrayList" structure).
This class solves the problems of efficiency (ArrayList#contains is linear, so we should reject that solution except in trivial cases), lack of ordering (storing everything directly in a HashSet doesn't help us), lack of ArrayList operations (LinkedHashSet is otherwise the best solution but we can't index into it, so it's not a true replacement for an ArrayList). 
Using a HashMap<E, index> instead of a HashSet would speed up remove(Object o) and indexOf(Object o) functions (but slow down sort). A linear remove(Object o) is the main drawback over a plain HashSet.
import java.util.*;

public class ArrayListSet<E> implements Iterable<E>, Set<E> {
    private ArrayList<E> list;
    private HashSet<E> set;

    public ArrayListSet() {
        list = new ArrayList<>();
        set = new HashSet<>();
    }

    public boolean add(E e) {
        return set.add(e) && list.add(e);
    }

    public boolean add(int i, E e) {
        if (!set.add(e)) return false;
        list.add(i, e);
        return true;
    }

    public void clear() {
        list.clear();
        set.clear();
    }

    public boolean contains(Object o) {
        return set.contains(o);
    }

    public E get(int i) {
        return list.get(i);
    }

    public boolean isEmpty() {
        return list.isEmpty();
    }

    public E remove(int i) {        
        E e = list.remove(i);
        set.remove(e);
        return e;
    }

    public boolean remove(Object o) {        
        if (set.remove(o)) {
            list.remove(o);
            return true;
        }

        return false;
    }

    public boolean set(int i, E e) {
        if (set.contains(e)) return false;

        set.add(e);
        set.remove(list.set(i, e));
        return true;
    }

    public int size() {
        return list.size();
    }

    public void sort(Comparator<? super E> c) {
        Collections.sort(list, c);
    }

    public Iterator<E> iterator() {
        return list.iterator();
    }

    public boolean addAll(Collection<? extends E> c) {
        int before = size();
        for (E e : c) add(e);
        return size() == before;
    }

    public boolean containsAll(Collection<?> c) {
        return set.containsAll(c);
    }

    public boolean removeAll(Collection<?> c) {
        return set.removeAll(c) && list.removeAll(c);
    }

    public boolean retainAll(Collection<?> c) {
         return set.retainAll(c) && list.retainAll(c);
    }

    public Object[] toArray() {
        return list.toArray();
    }

    public <T> T[] toArray(T[] a) {
        return list.toArray(a);
    }
}

Example usage:
public class ArrayListSetDriver {
    public static void main(String[] args) {
        ArrayListSet<String> fruit = new ArrayListSet<>();
        fruit.add("apple");
        fruit.add("banana");
        fruit.add("kiwi");
        fruit.add("strawberry");
        fruit.add("apple");
        fruit.add("strawberry");

        for (String item : fruit) {
            System.out.print(item + " "); // => apple banana kiwi strawberry
        }

        fruit.remove("kiwi");
        fruit.remove(1);
        fruit.add(0, "banana");
        fruit.set(2, "cranberry");
        fruit.set(0, "cranberry");
        System.out.println();

        for (int i = 0; i < fruit.size(); i++) {
            System.out.print(fruit.get(i) + " "); // => banana apple cranberry
        }

        System.out.println();
    }
}


Solution #4: ArrayListMap
This class solves a drawback of ArrayListSet which is that the data we want to store and its associated key may not be the same. This class provides a put method that enforces uniqueness on a different object than the data stored in the underlying ArrayList. This is just what we need to solve the original problem posed in this thread. This gives us the ordering and iteration of an ArrayList but fast lookups and uniqueness properties of a HashMap. The HashMap contains the unique values mapped to their index locations in the ArrayList, which enforces ordering and provides iteration.
This approach solves the scalability problems of using a HashSet in solution #1. That approach works fine for a quick file read, but without an abstraction, we'd have to handle all consistency operations by hand and pass around multiple raw data structures if we needed to enforce that contract across multiple functions and over time.
As with ArrayListSet, this can be considered a proof of concept rather than a full implementation.
import java.util.*;

public class ArrayListMap<K, V> implements Iterable<V>, Map<K, V> {
    private ArrayList<V> list;
    private HashMap<K, Integer> map;

    public ArrayListMap() {
        list = new ArrayList<>();
        map = new HashMap<>();
    }

    public void clear() {
        list.clear();
        map.clear();
    }

    public boolean containsKey(Object key) {
        return map.containsKey(key);
    }

    public boolean containsValue(Object value) {
        return list.contains(value);
    }

    public V get(int i) {
        return list.get(i);
    }

    public boolean isEmpty() {
        return map.isEmpty();
    }

    public V get(Object key) {
        return list.get(map.get(key));
    }

    public V put(K key, V value) {
        if (map.containsKey(key)) {
            int i = map.get(key);
            V v = list.get(i);
            list.set(i, value);
            return v;
        }

        list.add(value);
        map.put(key, list.size() - 1);
        return null;
    }

    public V putIfAbsent(K key, V value) {
        if (map.containsKey(key)) {
            if (list.get(map.get(key)) == null) {
                list.set(map.get(key), value);
                return null;
            }

            return list.get(map.get(key));
        }

        return put(key, value);
    }

    public V remove(int i) {
        V v = list.remove(i);

        for (Map.Entry<K, Integer> entry : map.entrySet()) {
            if (entry.getValue() == i) {
                map.remove(entry.getKey());
                break;
            }
        }

        decrementMapIndices(i);
        return v;
    }

    public V remove(Object key) {
        if (map.containsKey(key)) {
            int i = map.remove(key);
            V v = list.get(i);
            list.remove(i);
            decrementMapIndices(i);
            return v;
        }

        return null;
    }

    private void decrementMapIndices(int start) {
        for (Map.Entry<K, Integer> entry : map.entrySet()) {
            int i = entry.getValue();

            if (i > start) {
                map.put(entry.getKey(), i - 1);
            }
        }
    }

    public int size() {
        return list.size();
    }

    public void putAll(Map<? extends K, ? extends V> m) {
        for (Map.Entry<? extends K, ? extends V> entry : m.entrySet()) {
            put(entry.getKey(), entry.getValue());
        }
    }

    public Set<Map.Entry<K, V>> entrySet() {
        Set<Map.Entry<K, V>> es = new HashSet<>();

        for (Map.Entry<K, Integer> entry : map.entrySet()) {
            es.add(new AbstractMap.SimpleEntry<>(
                entry.getKey(), list.get(entry.getValue())
            ));
        }

        return es;
    }

    public Set<K> keySet() {
        return map.keySet();
    }

    public Collection<V> values() {
        return list;
    }

    public Iterator<V> iterator() {
        return list.iterator();
    }

    public Object[] toArray() {
        return list.toArray();
    }

    public <T> T[] toArray(T[] a) {
        return list.toArray(a);
    }
}

Here's the class in action on the original problem:
import java.io.*;

public class Main {
    public static void main(String[] args) 
        throws FileNotFoundException, IOException {

        String file = "prova.txt";
        ArrayListMap<String, String[]> data = new ArrayListMap<>();

        try (BufferedReader br = new BufferedReader(new FileReader(file))) {
            for (String line; (line = br.readLine()) != null;) {
                String[] split = line.split("\\s+");
                String key = split[0] + " " + split[1];
                String[] sub = Arrays.copyOfRange(split, 2, split.length); 
                data.putIfAbsent(key, sub); 
            }
        }

        for (Map.Entry<String, String[]> e : data.entrySet()) {
            System.out.println(e.getKey() + " => " + 
                java.util.Arrays.toString(e.getValue()));
        }

        for (String[] a : data) {
            System.out.println(java.util.Arrays.toString(a));
        }
    }
}



"Cannot send session cache limiter - headers already sent"
 
"Headers already sent" means that your PHP script already sent the HTTP headers, and as such it can't make modifications to them now.
Check that you don't send ANY content before calling session_start. Better yet, just make session_start the first thing you do in your PHP file (so put it at the absolute beginning, before all HTML etc).


Where are logs located?
 

Ensure debug mode is on - either add APP_DEBUG=true to .env file or set an environment variable
Log files are in storage/logs folder. laravel.log is the default filename. If there is a permission issue with the log folder, Laravel just halts. So if your endpoint generally works - permissions are not an issue.
In case your calls don't even reach Laravel or aren't caused by code issues - check web server's log files (check your Apache/nginx config files to see the paths).
If you use PHP-FPM, check its log files as well (you can see the path to log file in PHP-FPM pool config).



How can I pull from remote Git repository and override the changes in my local repository?
 
Provided that the remote repository is origin, and that you're interested in master:
git fetch origin
git reset --hard origin/master

This tells it to fetch the commits from the remote repository, and position your working copy to the tip of its master branch. 
All your local commits not common to the remote will be gone.


SQL subquery with COUNT help
 
SELECT e.*,
       cnt.colCount 
FROM eventsTable e
INNER JOIN (
           select columnName,count(columnName) as colCount
           from eventsTable e2 
          group by columnName
           ) as cnt on cnt.columnName = e.columnName
WHERE e.columnName='Business'

-- Added space


Is it possible to open a Windows Explorer window from PowerShell?
 
You have a few options:

Powershell looks for executables in your path, just as cmd.exe does. So you can just type explorer on the powershell prompt. Using this method, you can also pass cmd-line arguments (see http://support.microsoft.com/kb/314853)
The Invoke-Item cmdlet provides a way to run an executable file or to open a file (or set of files) from within Windows PowerShell. Alias: ii
use system.diagnostics.process

Examples:
PS C:\> explorer
PS C:\> explorer .
PS C:\> explorer /n
PS C:\> Invoke-Item c:\path\
PS C:\> ii c:\path\
PS C:\> Invoke-Item c:\windows\explorer.exe
PS C:\> ii c:\windows\explorer.exe
PS C:\> [diagnostics.process]::start("explorer.exe")



How to check if an user is logged in Symfony2 inside a controller?
 
It's good practise to extend from a baseController and implement some base functions
implement a function to check if the user instance is null like this
if the user form the Userinterface then there is no user logged in
/**

*/
class BaseController extends AbstractController
{

    /**
     * @return User

     */
    protected function getUser(): ?User
    {
        return parent::getUser();
    }

    /**
     * @return bool
     */
    protected function isUserLoggedIn(): bool
    {
        return $this->getUser() instanceof User;
    }
}



Python convert tuple to string
 
here is an easy way to use join.
''.join(('a', 'b', 'c', 'd', 'g', 'x', 'r', 'e'))



How to remove "onclick" with JQuery?
 
Try this if you unbind the onclick event by ID Then use:
$('#youLinkID').attr('onclick','').unbind('click');

Try this if you unbind the onclick event by Class Then use:
$('.className').attr('onclick','').unbind('click');



Delete keychain items when an app is uninstalled
 
Files will be deleted from your app's document directory when the user uninstalls the app. Knowing this, all you have to do is check whether a file exists as the first thing that happens in application:didFinishLaunchingWithOptions:. Afterwards, unconditionally create the file (even if it's just a dummy file). 
If the file did not exist at time of check, you know this is the first run since the latest install. If you need to know later in the app, save the boolean result to your app delegate member. 


How do you reverse a string in place in C or C++?
 
In the interest of completeness, it should be pointed out that there are representations of strings on various platforms in which the number of bytes per character varies depending on the character. Old-school programmers would refer to this as DBCS (Double Byte Character Set). Modern programmers more commonly encounter this in UTF-8 (as well as UTF-16 and others). There are other such encodings as well.
In any of these variable-width encoding schemes, the simple algorithms posted here (evil, non-evil or otherwise) would not work correctly at all! In fact, they could even cause the string to become illegible or even an illegal string in that encoding scheme. See Juan Pablo Califano's answer for some good examples.
std::reverse() potentially would still work in this case, as long as your platform's implementation of the Standard C++ Library (in particular, string iterators) properly took this into account.


What .NET collection provides the fastest search
 
If it's possible to sort your items then there is a much faster way to do this then doing key lookups into a hashtable or b-tree. Though if you're items aren't sortable you can't really put them into a b-tree anyway. 
Anyway, if sortable sort both lists then it's just a matter of walking the lookup list in order.
Walk lookup list
   While items in check list <= lookup list item
     if check list item = lookup list item do something
   Move to next lookup list item



import .css file into .less file
 
If you want your CSS to be copied into the output without being processed, you can use the (inline) directive. e.g.,
@import (inline) '../timepicker/jquery.ui.timepicker.css';



how to prevent this error : Warning: mysql_fetch_assoc() expects parameter 1 to be resource, boolean given in ... on line 11
 
This is how you should be using mysql_fetch_assoc():
$result = mysql_query($query);

while ($row = mysql_fetch_assoc($result)) {
    // Do stuff with $row
}

$result should be a resource. Even if the query returns no rows, $result is still a resource. The only time $result is a boolean value, is if there was an error when querying the database. In which case, you should find out what that error is by using mysql_error() and ensure that it can't happen. Then you don't have to hide from any errors.
You should always cover the base that errors may happen by doing:
if (!$result) {
    die(mysql_error());
}

At least then you'll be more likely to actually fix the error, rather than leave the users with a glaring ugly error in their face.


How to get text of an element in Selenium WebDriver, without including child element text?
 
In the HTML which you have shared:
<div id="a">This is some
   <div id="b">text</div>
</div>

The text This is some is within a text node. To depict the text node in a structured way:
<div id="a">
    This is some
   <div id="b">text</div>
</div>


This Usecase
To extract and print the text This is some from the text node using Selenium's python client you have 2 ways as follows:

Using splitlines(): You can identify the parent element i.e. <div id="a">, extract the innerHTML and then use splitlines() as follows:

using xpath:
print(driver.find_element_by_xpath("//div[@id='a']").get_attribute("innerHTML").splitlines()[0])

using xpath:
print(driver.find_element_by_css_selector("div#a").get_attribute("innerHTML").splitlines()[0])


Using execute_script(): You can also use the execute_script() method which can synchronously execute JavaScript in the current window/frame as follows:

using xpath and firstChild:
parent_element = driver.find_element_by_xpath("//div[@id='a']")
print(driver.execute_script('return arguments[0].firstChild.textContent;', parent_element).strip())

using xpath and childNodes[n]:
parent_element = driver.find_element_by_xpath("//div[@id='a']")
print(driver.execute_script('return arguments[0].childNodes[1].textContent;', parent_element).strip())





Programmatically stop execution of python script?
 
You want sys.exit(). From Python's docs:
>>> import sys
>>> print sys.exit.__doc__
exit([status])

Exit the interpreter by raising SystemExit(status).
If the status is omitted or None, it defaults to zero (i.e., success).
If the status is numeric, it will be used as the system exit status.
If it is another kind of object, it will be printed and the system
exit status will be one (i.e., failure).

So, basically, you'll do something like this:
from sys import exit

# Code!

exit(0) # Successful exit



Create a mocked list by mockito
 
We can mock list properly for foreach loop. Please find below code snippet and explanation.
This is my actual class method where I want to create test case by mocking list.
this.nameList is a list object.
public void setOptions(){
    // ....
    for (String str : this.nameList) {
        str = "-"+str;
    }
    // ....
}

The foreach loop internally works on iterator, so here we crated mock of iterator.
Mockito framework has facility to return pair of values on particular method call by using Mockito.when().thenReturn(), i.e. on hasNext() we pass 1st true and on second call false, so that our loop will continue only two times. On next() we just return actual return value.
@Test
public void testSetOptions(){
    // ...
    Iterator<SampleFilter> itr = Mockito.mock(Iterator.class);
    Mockito.when(itr.hasNext()).thenReturn(true, false);
    Mockito.when(itr.next()).thenReturn(Mockito.any(String.class);  

    List mockNameList = Mockito.mock(List.class);
    Mockito.when(mockNameList.iterator()).thenReturn(itr);
    // ...
}

In this way we can avoid sending actual list to test by using mock of list.


How to output to the console in C++/Windows
 
The AllocConsole Windows API function will create a console window for your application.


how to add value to combobox item
 
If you want to use SelectedValue then your combobox must be databound.
To set up the combobox:
ComboBox1.DataSource = GetMailItems()
ComboBox1.DisplayMember = "Name"
ComboBox1.ValueMember = "ID"

To get the data:
Function GetMailItems() As List(Of MailItem)

    Dim mailItems = New List(Of MailItem)

    Command = New MySqlCommand("SELECT * FROM `maillist` WHERE l_id = '" & id & "'", connection)
    Command.CommandTimeout = 30
    Reader = Command.ExecuteReader()

    If Reader.HasRows = True Then
        While Reader.Read()
            mailItems.Add(New MailItem(Reader("ID"), Reader("name")))
        End While
    End If

    Return mailItems

End Function

Public Class MailItem

    Public Sub New(ByVal id As Integer, ByVal name As String)
        mID = id
        mName = name
    End Sub

    Private mID As Integer
    Public Property ID() As Integer
        Get
            Return mID
        End Get
        Set(ByVal value As Integer)
            mID = value
        End Set
    End Property

    Private mName As String
    Public Property Name() As String
        Get
            Return mName
        End Get
        Set(ByVal value As String)
            mName = value
        End Set
    End Property

End Class



Webdriver Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms
 
Get the latest Selenium jars (2.30) for FireFox 19
You can download the latest jars (2.31 as of writing) here: https://code.google.com/p/selenium/downloads/list


How to escape a JSON string containing newline characters using JavaScript?
 
Use encodeURIComponent() to encode the string.
Eg. var myEscapedJSONString = encodeURIComponent(JSON.stringify(myJSON));
You don't need to decode it since the web server automatically do the same.


java.lang.ClassNotFoundException: javax.servlet.jsp.jstl.core.Config
 
The error is telling you it cannot find the class because it is not available in your application.
If you are using Maven, make sure you have the dependency for jstl artifact:
<dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
</dependency>

If you are not using it, just make sure you include the JAR in your classpath. See this answer for download links.


Comparing two collections for equality irrespective of the order of items in them
 
Create a Dictionary "dict" and then for each member in the first collection, do dict[member]++;
Then, loop over the second collection in the same way, but for each member do dict[member]--.
At the end, loop over all of the members in the dictionary:
    private bool SetEqual (List<int> left, List<int> right) {

        if (left.Count != right.Count)
            return false;

        Dictionary<int, int> dict = new Dictionary<int, int>();

        foreach (int member in left) {
            if (dict.ContainsKey(member) == false)
                dict[member] = 1;
            else
                dict[member]++;
        }

        foreach (int member in right) {
            if (dict.ContainsKey(member) == false)
                return false;
            else
                dict[member]--;
        }

        foreach (KeyValuePair<int, int> kvp in dict) {
            if (kvp.Value != 0)
                return false;
        }

        return true;

    }

Edit: As far as I can tell this is on the same order as the most efficient algorithm. This algorithm is O(N), assuming that the Dictionary uses O(1) lookups.


How to check if a stored procedure exists before creating it
 
CREATE Procedure IF NOT EXISTS 'Your proc-name' () BEGIN ... END


Angular 4/5/6 Global Variables
 
I use environment for that. It works automatically and you don't have to create new injectable service and most usefull for me, don't need to import via constructor.
1) Create environment variable in your environment.ts
export const environment = {
    ...
    // runtime variables
    isContentLoading: false,
    isDeployNeeded: false
}

2) Import environment.ts in *.ts file and create public variable (i.e. "env") to be able to use in html template
import { environment } from 'environments/environment';

@Component(...)
export class TestComponent {
    ...
    env = environment;
}

3) Use it in template... 
<app-spinner *ngIf='env.isContentLoading'></app-spinner>

in *.ts ... 
env.isContentLoading = false 

(or just environment.isContentLoading in case you don't need it for template)

You can create your own set of globals within environment.ts like so:
export const globals = {
    isContentLoading: false,
    isDeployNeeded: false
}

and import directly these variables (y)


Spring Hibernate - Could not obtain transaction-synchronized Session for current thread
 
Add transaction-manager to your <annotation-driven/> in spring-servlet.xml:
<tx:annotation-driven transaction-manager="yourTransactionBeanID"/>



Change the color of a checked menu item in a navigation drawer
 
Step 1: Build a checked/unchecked selector: 
selector.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:color="@color/yellow" android:state_checked="true" />
    <item android:color="@color/white" android:state_checked="false" />
</selector>

Step 2: use the xml attribute app:itemTextColor within NavigationView widget for selecting the text color.
<android.support.design.widget.NavigationView
    android:id="@+id/nav_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    app:headerLayout="@layout/navigation_header_layout"
    app:itemTextColor="@drawable/selector"
    app:menu="@menu/navigation_menu" />

Step 3:

For some reason when you hit an item from the NavigationView menu, it doesn't consider this as a button check. So you need to manually get the selected item checked and clear the previously selected item. Use below listener to do that
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {

    int id = item.getItemId();

    // remove all colors of the items to the `unchecked` state of the selector
    removeColor(mNavigationView);

    // check the selected item to change its color set by the `checked` state of the selector
    item.setChecked(true);

    switch (item.getItemId()) {
      case R.id.dashboard:
          ...
    }

    drawerLayout.closeDrawer(GravityCompat.START);
    return true;
}

private void removeColor(NavigationView view) {
    for (int i = 0; i < view.getMenu().size(); i++) {
        MenuItem item = view.getMenu().getItem(i);
        item.setChecked(false);
    }
}

Step 4:

To change icon color, use the app:iconTint attribute in the NavigationView menu items, and set to the same selector.
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <item
        android:id="@+id/nav_account"
        android:checked="true"
        android:icon="@drawable/ic_person_black_24dp"
        android:title="My Account"
        app:iconTint="@drawable/selector" />
    <item
        android:id="@+id/nav_settings"
        android:icon="@drawable/ic_settings_black_24dp"
        android:title="Settings"
        app:iconTint="@drawable/selector" />

    <item
        android:id="@+id/nav_logout"
        android:icon="@drawable/logout"
        android:title="Log Out"
        app:iconTint="@drawable/selector" />
</menu>

Result:



Redirect all to index.php using htaccess
 
You can use something like this:
RewriteEngine on
RewriteRule ^.+$ /index.php [L]

This will redirect every query to the root directory's index.php. Note that it will also redirect queries for files that exist, such as images, javascript files or style sheets.


C: scanf to array
 
int main()
{
  int array[11];
  printf("Write down your ID number!\n");
  for(int i=0;i<id_length;i++)
  scanf("%d", &array[i]);
  if (array[0]==1)
  {
    printf("\nThis person is a male.");
  }
  else if (array[0]==2)
  {
    printf("\nThis person is a female.");
  }
  return 0;
}



Git remote branch deleted, but still it appears in 'branch -a'
 
Try:
git remote prune origin

From the Git remote documentation:
prune

Deletes all stale
remote-tracking branches under <name>.
These stale branches have already been
removed from the remote repository
referenced by <name>, but are still
locally available in "remotes/<name>".


 With --dry-run option, report
what branches will be pruned, but do
not actually prune them.



Using setDate in PreparedStatement
 
If you want to add the current date into the database, I would avoid calculating the date in Java to begin with. Determining "now" on the Java (client) side leads to possible inconsistencies in the database if the client side is mis-configured, has the wrong time, wrong timezone, etc. Instead, the date can be set on the server side in a manner such as the following:
requestSQL = "INSERT INTO CREDIT_REQ_TITLE_ORDER ("   +
                "REQUEST_ID, ORDER_DT, FOLLOWUP_DT) " +
                "VALUES(?, SYSDATE, SYSDATE + 30)";

...

prs.setInt(1, new Integer(requestID));

This way, only one bind parameter is required and the dates are calculated on the server side will be consistent. Even better would be to add an insert trigger to CREDIT_REQ_TITLE_ORDER and have the trigger insert the dates. That can help enforce consistency between different client apps (for example, someone trying to do a fix via sqlplus.


Pythonic way to find maximum value and its index in a list?
 
This answer is 33 times faster than @Escualo assuming that the list is very large, and assuming that it's already an np.array(). I had to turn down the number of test runs because the test is looking at 10000000 elements not just 100.
import random
from datetime import datetime
import operator
import numpy as np

def explicit(l):
    max_val = max(l)
    max_idx = l.index(max_val)
    return max_idx, max_val

def implicit(l):
    max_idx, max_val = max(enumerate(l), key=operator.itemgetter(1))
    return max_idx, max_val

def npmax(l):
    max_idx = np.argmax(l)
    max_val = l[max_idx]
    return (max_idx, max_val)

if __name__ == "__main__":
    from timeit import Timer

t = Timer("npmax(l)", "from __main__ import explicit, implicit, npmax; "
      "import random; import operator; import numpy as np;"
      "l = np.array([random.random() for _ in xrange(10000000)])")
print "Npmax: %.2f msec/pass" % (1000  * t.timeit(number=10)/10 )

t = Timer("explicit(l)", "from __main__ import explicit, implicit; "
      "import random; import operator;"
      "l = [random.random() for _ in xrange(10000000)]")
print "Explicit: %.2f msec/pass" % (1000  * t.timeit(number=10)/10 )

t = Timer("implicit(l)", "from __main__ import explicit, implicit; "
      "import random; import operator;"
      "l = [random.random() for _ in xrange(10000000)]")
print "Implicit: %.2f msec/pass" % (1000  * t.timeit(number=10)/10 )

Results on my computer:
Npmax: 8.78 msec/pass
Explicit: 290.01 msec/pass
Implicit: 790.27 msec/pass



Regular expression negative lookahead
 
A negative lookahead says, at this position, the following regex can not match. 
Let's take a simplified example:
a(?!b(?!c))

a      Match: (?!b) succeeds
ac     Match: (?!b) succeeds
ab     No match: (?!b(?!c)) fails
abe    No match: (?!b(?!c)) fails
abc    Match: (?!b(?!c)) succeeds

The last example is a double negation: it allows a b followed by c. The nested negative lookahead becomes a positive lookahead: the c should be present.
In each example, only the a is matched. The lookahead is only a condition, and does not add to the matched text.


How to refer to Excel objects in Access VBA?
 
First you need to set a reference (Menu: Tools->References) to the Microsoft Excel Object Library then you can access all Excel Objects. 
After you added the Reference you have full access to all Excel Objects. You need to add Excel in front of everything for example:
Dim xlApp as Excel.Application

Let's say you added an Excel Workbook Object in your Form and named it xLObject.
Here is how you Access a Sheet of this Object and change a Range
Dim sheet As Excel.Worksheet
Set sheet = xlObject.Object.Sheets(1)
sheet.Range("A1") = "Hello World"

(I copied the above from my answer to this question)
Another way to use Excel in Access is to start Excel through a Access Module (the way shahkalpesh described it in his answer)


What is the use of "using namespace std"?
 

using: You are going to use it.
namespace: To use what? A namespace.
std: The std namespace (where features of the C++ Standard Library, such as string or vector, are declared).

After you write this instruction, if the compiler sees string it will know that you may be referring to std::string, and if it sees vector, it will know that you may be referring to std::vector. (Provided that you have included in your compilation unit the header files where they are defined, of course.)
If you don't write it, when the compiler sees string or vector it will not know what you are refering to. You will need to explicitly tell it std::string or std::vector, and if you don't, you will get a compile error.


Find the index of a dict within a list, by matching the dict's value
 
It won't be efficient, as you need to walk the list checking every item in it (O(n)). If you want efficiency, you can use dict of dicts.
On the question, here's one possible way to find it (though, if you want to stick to this data structure, it's actually more efficient to use a generator as Brent Newey has written in the comments; see also tokland's answer):
>>> L = [{'id':'1234','name':'Jason'},
...         {'id':'2345','name':'Tom'},
...         {'id':'3456','name':'Art'}]
>>> [i for i,_ in enumerate(L) if _['name'] == 'Tom'][0]
1



What does "SyntaxError: Missing parentheses in call to 'print'" mean in Python?
 
Basically, since Python 3.x you need to use print with parenthesis.
Python 2.x: print "Lord of the Rings"
Python 3.x: print("Lord of the Rings")

Explaination
print was a statement in 2.x, but it's a function in 3.x. Now, there are a number of good reasons for this.

With function format of Python 3.x, more flexibility comes when printing multiple items with comman separated.
You can't use argument splatting with a statement. In 3.x if you have a list of items that you want to print with a separator, you can do this:


>>> items = ['foo', 'bar', 'baz']
>>> print(*items, sep='+') 
foo+bar+baz



You can't override a statement. If you want to change the behavior of print, you can do that when it's a function but not when it's a statement.



Using :: in C++
 
The :: is called scope resolution operator.
Can be used like this:
:: identifier

class-name :: identifier

namespace :: identifier
You can read about it here

https://docs.microsoft.com/en-us/cpp/cpp/scope-resolution-operator?view=vs-2017


How to remove .html from URL?
 
I use this .htacess for removing .html extantion from my url site, please verify this is correct code:
    RewriteEngine on
RewriteBase /
RewriteCond %{http://www.proofers.co.uk/new} !(\.[^./]+)$
RewriteCond %{REQUEST_fileNAME} !-d
RewriteCond %{REQUEST_fileNAME} !-f
RewriteRule (.*) /$1.html [L]
RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /([^.]+)\.html\ HTTP
RewriteRule ^([^.]+)\.html$ http://www.proofers.co.uk/new/$1 [R=301,L]



How do I check for null values in JavaScript?
 
just replace the == with === in all places.
== is a loose or abstract equality comparison
=== is a strict equality comparison
See the MDN article on Equality comparisons and sameness for more detail.


Disabling of EditText in Android
 
android:editable="false"

is now deprecated and use
 YourEditText.setInputType(InputType.TYPE_NULL);



Do checkbox inputs only post data if they're checked?
 
input type="hidden" name="is_main" value="0"
input type="checkbox" name="is_main" value="1"
so you can control like this as I did in the application.
if it checks then send value 1 otherwise 0


C++ error: "Array must be initialized with a brace enclosed initializer"
 
The syntax to statically initialize an array uses curly braces, like this:
int array[10] = { 0 };

This will zero-initialize the array.
For multi-dimensional arrays, you need nested curly braces, like this:
int cipher[Array_size][Array_size]= { { 0 } };

Note that Array_size must be a compile-time constant for this to work. If Array_size is not known at compile-time, you must use dynamic initialization. (Preferably, an std::vector).


for-in statement
 
TypeScript isn't giving you a gun to shoot yourself in the foot with.
The iterator variable is a string because it is a string, full stop. Observe:
var obj = {};
obj['0'] = 'quote zero quote';
obj[0.0] = 'zero point zero';
obj['[object Object]'] = 'literal string "[object Object]"';
obj[<any>obj] = 'this obj'
obj[<any>undefined] = 'undefined';
obj[<any>"undefined"] = 'the literal string "undefined"';

for(var key in obj) {
    console.log('Type: ' + typeof key);
    console.log(key + ' => ' + obj[key]);
}

How many key/value pairs are in obj now? 6, more or less? No, 3, and all of the keys are strings:
Type: string
0 => zero point zero
Type: string
[object Object] => this obj; 
Type: string
undefined => the literal string "undefined" 



Moving average or running mean
 
With @Aikude's variables, I wrote one-liner.
import numpy as np

mylist = [1, 2, 3, 4, 5, 6, 7]
N = 3

mean = [np.mean(mylist[x:x+N]) for x in range(len(mylist)-N+1)]
print(mean)

>>> [2.0, 3.0, 4.0, 5.0, 6.0]



SOAP-ERROR: Parsing WSDL: Couldn't load from - but works on WAMP
 
Try changing
$client = new SoapClient('http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl', ['trace' => true]);

to
$client = new SoapClient('http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl', ['trace' => true, 'cache_wsdl' => WSDL_CACHE_MEMORY]);

Also (whether that works or not), check to make sure that /tmp is writeable by your web server and that it isn't full.


SQL Query - Change date format in query to DD/MM/YYYY
 
If you have a Date (or Datetime) column, look at http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_date-format
 SELECT DATE_FORMAT(datecolumn,'%d/%m/%Y') FROM ...

Should do the job for MySQL, for SqlServer I'm sure there is an analog function.
If you have a VARCHAR column, you might have at first to convert it to a date, see STR_TO_DATE for MySQL.


How To Accept a File POST
 
see http://www.asp.net/web-api/overview/formats-and-model-binding/html-forms-and-multipart-mime#multipartmime, although I think the article makes it seem a bit more complicated than it really is.
Basically, 
public Task<HttpResponseMessage> PostFile() 
{ 
    HttpRequestMessage request = this.Request; 
    if (!request.Content.IsMimeMultipartContent()) 
    { 
        throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType); 
    } 

    string root = System.Web.HttpContext.Current.Server.MapPath("~/App_Data/uploads"); 
    var provider = new MultipartFormDataStreamProvider(root); 

    var task = request.Content.ReadAsMultipartAsync(provider). 
        ContinueWith<HttpResponseMessage>(o => 
    { 

        string file1 = provider.BodyPartFileNames.First().Value;
        // this is the file name on the server where the file was saved 

        return new HttpResponseMessage() 
        { 
            Content = new StringContent("File uploaded.") 
        }; 
    } 
    ); 
    return task; 
} 



In PHP how can you clear a WSDL cache?
 
You can safely delete the WSDL cache files. If you wish to prevent future caching, use:
ini_set("soap.wsdl_cache_enabled", 0);

or dynamically:
$client = new SoapClient('http://somewhere.com/?wsdl', array('cache_wsdl' => WSDL_CACHE_NONE) );



batch file - counting number of files in folder and storing in a variable
 
The fastest code for counting files with ANY attributes in folder %FOLDER% and its subfolders is the following. The code is for script in a command script (batch) file.
@for /f %%a in ('2^>nul dir "%FOLDER%" /a-d/b/-o/-p/s^|find /v /c ""') do set n=%%a
@echo Total files: %n%.



Problems with a PHP shell script: "Could not open input file"
 
Have you tried:
#!/usr/local/bin/php

I.e. without the -q part? That's what the error message "Could not open input file: -q" means. The first argument to php if it doesn't look like an option is the name of the PHP file to execute, and -q is CGI only.
EDIT: A couple of (non-related) tips:

You don't need to terminate the last block of PHP with ?>. In fact, it is often better not to.
When executed on the command line, PHP defines the global constant STDIN to fopen("php://stdin", "r"). You can use that instead of opening "php://stdin" a second time: $fd = STDIN;



Python: CSV write by column rather than row
 
As an alternate streaming approach: 

dump each col into a file
use python or unix paste command to rejoin on tab, csv, whatever.

Both steps should handle steaming just fine. 
Pitfalls:

if you have 1000s of columns, you might run into the unix file handle limit!



Check if an object exists
 
You can also use get_object_or_404(), it will raise a Http404 if the object wasn't found:
user_pass = log_in(request.POST) #form class
if user_pass.is_valid():
    cleaned_info = user_pass.cleaned_data
    user_object = get_object_or_404(User, email=cleaned_info['username'])
    # User object found, you are good to go!
    ...



Java String remove all non numeric characters
 
With guava:
String input = "abx123.5";
String result = CharMatcher.inRange('0', '9').or(CharMatcher.is('.')).retainFrom(input);

see http://code.google.com/p/guava-libraries/wiki/StringsExplained


How to change port for jenkins window service when 8080 is being used
 
Check in Jenkins.xml and update like below
<arguments>-Xrs -Xmx256m -Dhudson.lifecycle=hudson.lifecycle.WindowsServiceLifecycle -jar "%BASE%\jenkins.war" --httpPort=8090</arguments>



Quicker way to get all unique values of a column in VBA?
 
PowerShell is a very powerful and efficient tool. This is cheating a little, but shelling PowerShell via VBA opens up lots of options
The bulk of the code below is simply to save the current sheet as a csv file. The output is another csv file with just the unique values
Sub AnotherWay()
Dim strPath As String
Dim strPath2 As String

Application.DisplayAlerts = False
strPath = "C:\Temp\test.csv"
strPath2 = "C:\Temp\testout.csv"
ActiveWorkbook.SaveAs strPath, xlCSV
x = Shell("powershell.exe $csv = import-csv -Path """ & strPath & """ -Header A | Select-Object -Unique A | Export-Csv """ & strPath2 & """ -NoTypeInformation", 0)
Application.DisplayAlerts = True

End Sub



Why is my locally-created script not allowed to run under the RemoteSigned execution policy?
 
This is an IDE issue. Change the setting in the PowerShell GUI. Go to the Tools tab and select Options, and then Debugging options. Then check the box Turn off requirement for scripts to be signed. Done.


PHP filesize MB/KB conversion
 
//Get the size in bytes
function calculateFileSize($size)
{
   $sizes = ['B', 'KB', 'MB', 'GB'];
   $count=0;
   if ($size < 1024) {
    return $size . " " . $sizes[$count];
    } else{
     while ($size>1024){
        $size=round($size/1024,2);
        $count++;
    }
     return $size . " " . $sizes[$count];
   }
}



How can I remove all objects but one from the workspace in R?
 
I think another option is to open workspace in RStudio and then change list to grid at the top right of the environment(image below). Then tick the objects you want to clear and finally click on clear. 



How to get screen width and height
 
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);

int height = metrics.heightPixels;
int width = metrics.widthPixels;

i guess the code which you wrote is deprecated.


How to restart a single container with docker-compose
 
To restart a service with changes here are the steps that I performed:
docker-compose stop -t 1 worker
docker-compose build worker
docker-compose up --no-start worker
docker-compose start worker



How to run SQL in shell script
 
#!/bin/ksh
variable1=$( 
echo "set feed off
set pages 0
select count(*) from table;
exit
"  | sqlplus -s username/password@oracle_instance
)
echo "found count = $variable1"



How to find which version of TensorFlow is installed in my system?
 
import tensorflow as tf

print(tf.VERSION)



Proper use of 'yield return'
 
The two pieces of code are really doing two different things. The first version will pull members as you need them. The second version will load all the results into memory before you start to do anything with it.
There's no right or wrong answer to this one. Which one is preferable just depends on the situation. For example, if there's a limit of time that you have to complete your query and you need to do something semi-complicated with the results, the second version could be preferable. But beware large resultsets, especially if you're running this code in 32-bit mode. I've been bitten by OutOfMemory exceptions several times when doing this method.
The key thing to keep in mind is this though: the differences are in efficiency. Thus, you should probably go with whichever one makes your code simpler and change it only after profiling.

Programs & Examples On #Togglebutton

Android: Create a toggle button with image and no text

Change "on" color of a Switch

Change the On/Off text of a toggle button Android

Toggle button using two image on different state

How to make a radio button look like a toggle button

Example on ToggleButton

Sort table rows In Bootstrap

These examples are minified because StackOverflow has a maximum character limit and links to external code are discouraged since links can break.

There are multiple plugins if you look: Bootstrap Sortable, Bootstrap Table or DataTables.

How to format strings in Java

New og:image size for Facebook share?

Is it possible to set the stacking order of pseudo-elements below their parent element?

How can I recover the return value of a function passed to multiprocessing.Process?

How do I create a MongoDB dump of my database?

How to install Python MySQLdb module using pip?

Change the content of a div based on selection from dropdown menu

How does String substring work in Swift

How to get just the date part of getdate()?

JQuery Parsing JSON array

How to escape indicator characters (i.e. : or - ) in YAML

How do I make Java register a string input with spaces?

How to change font in ipython notebook

Using 'make' on OS X

Difference between [routerLink] and routerLink

Passing variables, creating instances, self, The mechanics and usage of classes: need explanation

How to convert an OrderedDict into a regular dict in python3

Go / golang time.Now().UnixNano() convert to milliseconds?

registerForRemoteNotificationTypes: is not supported in iOS 8.0 and later

Function in JavaScript that can be called only once

How to initialize an array's length in JavaScript?

Show two digits after decimal point in c++

PHP-FPM and Nginx: 502 Bad Gateway

Why should I use core.autocrlf=true in Git?

How to execute function in SQL Server 2008

Enter triggers button click

The type must be a reference type in order to use it as parameter 'T' in the generic type or method

Git fast forward VS no fast forward merge

Bootstrap button - remove outline on Chrome OS X

Verifying that a string contains only letters in C#

Common HTTPclient and proxy

Can a JSON value contain a multiline string

How can I access Oracle from Python?

How to provide shadow to Button

Client on Node.js: Uncaught ReferenceError: require is not defined

How do I use PHP to get the current year?

How to declare a Fixed length Array in TypeScript

How to convert string to XML using C#

Copy files from one directory into an existing directory

When to use Common Table Expression (CTE)

Valid values for android:fontFamily and what they map to?

JSON, REST, SOAP, WSDL, and SOA: How do they all link together

"column not allowed here" error in INSERT statement

Is it a bad practice to use break in a for loop?

Grep regex NOT containing string

How to launch Windows Scheduler by command-line?

.NET Global exception handler in console application

Is null check needed before calling instanceof?

How do I know if jQuery has an Ajax request pending?

Javascript date.getYear() returns 111 in 2011?

Best way to use multiple SSH private keys on one client

Display Records From MySQL Database using JTable in Java

includes() not working in all browsers

Using .Select and .Where in a single LINQ statement

"undefined" function declared in another file?

Sending a notification from a service in Android

Find and extract a number from a string

Python: No acceptable C compiler found in $PATH when installing python

Maximum value of maxRequestLength?

Upgrade Node.js to the latest version on Mac OS

Immutable vs Mutable types

Laravel PDOException SQLSTATE[HY000] [1049] Unknown database 'forge'

How does C#'s random number generator work?

How to integrate sourcetree for gitlab

How do I turn off Unicode in a VC++ project?

Query-string encoding of a Javascript Object

Add CSS box shadow around the whole DIV

Use this below code

Explanation:-

Usage

Why is init() always called after new()?

And finally, a lesser known feature of `assert`: