MongoDB becomes more popular among the developers because of its schemaless nature which give more flexibility. We can store any kind of data without having to worry about the structure of the data.
For few operations, I went through lot of searches to get the correct solutions. Some of them are
- Renaming a field name
- Change type of field value
- Finding document if the field exists
- Sucking MongoDB console
Lets assume that you have a MongoDB collection bookmarks for Bookmarking application
{
'name' : 'DIVE INTO HTML5',
'url' : 'http://diveintohtml5.info/index.html',
'author': 'MARK PILGRIM',
'upvote': '2',
'created_at': "2013-07-02 00:00:00"
}
Renaming a field name
Let's say you want to rename a name filed to title, then
db.bookmarks.update({}, { $rename: {"name": "title"}}, { multi : true})
In above command, the option multi is important. Otherwise it will update only one document.
Change type of field value
If you want to change type of upvote field from string to number value, then
db.bookmarks.find().forEach(function (bookmark) {
bookmark.upvote = +(bookmark.upvote); // equivalent to parseInt
db.bookmarks.save(bookmark);
});
Finding the document if the field exists
Some scenarios, you might want to find the document which has a specific fields.
Lets say, get bookmarks which has tags field.
db.bookmarks.find({ tags : { $exists : true } });
If the value of field is null, then the field is considered as Not exist.
Sucking MongoDB console
MongoDB console sucks. I got frustrated whenever I work with MongoDB console. I desperately need JSON pretty for console output, and some more useful commands. Then I found the Mongo-hacker by
TylerBrock(Thanks bro). It is awesome and you must give a try.
Let me know if anything you got useful. Have a nice day.
Grunt is amazing task runner for front end application. We are using grunt for our front end project and it works great. But for a while, we don't know how to run grunt live reload with our own Node JS server.
Gruntfile
we have generated our web application skeleton using Yeoman tool based on the webapp generator(yo webapp). The generated Gruntfile as follows
// Generated on 2013-06-29 using generator-webapp 0.1.7
'use strict';
var lrSnippet = require('grunt-contrib-livereload/lib/utils').livereloadSnippet;
var mountFolder = function (connect, dir) {
return connect.static(require('path').resolve(dir));
};
// # Globbing
// for performance reasons we're only matching one level down:
// 'test/spec/{,*/}*.js'
// use this if you want to match all subfolders:
// 'test/spec/**/*.js'
module.exports = function (grunt) {
// load all grunt tasks
require('matchdep').filterDev('grunt-*').forEach(grunt.loadNpmTasks);
// configurable paths
var yeomanConfig = {
app: 'app',
dist: 'dist'
};
grunt.initConfig({
yeoman: yeomanConfig,
watch: {
coffee: {
files: ['<%= yeoman.app %>/scripts/{,*/}*.coffee'],
tasks: ['coffee:dist']
},
coffeeTest: {
files: ['test/spec/{,*/}*.coffee'],
tasks: ['coffee:test']
},
compass: {
files: ['<%= yeoman.app %>/styles/{,*/}*.{scss,sass}'],
tasks: ['compass:server']
},
livereload: {
files: [
'<%= yeoman.app %>/*.html',
'{.tmp,<%= yeoman.app %>}/styles/{,*/}*.css',
'{.tmp,<%= yeoman.app %>}/scripts/{,*/}*.js',
'<%= yeoman.app %>/images/{,*/}*.{png,jpg,jpeg,gif,webp,svg}'
],
tasks: ['livereload']
}
},
connect: {
options: {
port: 9000,
// change this to '0.0.0.0' to access the server from outside
hostname: 'localhost'
},
livereload: {
options: {
middleware: function (connect) {
return [
lrSnippet,
mountFolder(connect, '.tmp'),
mountFolder(connect, 'app')
];
}
}
},
test: {
options: {
middleware: function (connect) {
return [
mountFolder(connect, '.tmp'),
mountFolder(connect, 'test')
];
}
}
},
dist: {
options: {
middleware: function (connect) {
return [
mountFolder(connect, 'dist')
];
}
}
}
},
open: {
server: {
path: 'http://localhost:<%= connect.options.port %>'
}
},
clean: {
dist: {
files: [{
dot: true,
src: [
'.tmp',
'<%= yeoman.dist %>/*',
'!<%= yeoman.dist %>/.git*'
]
}]
},
server: '.tmp'
},
jshint: {
options: {
jshintrc: '.jshintrc'
},
all: [
'Gruntfile.js',
'<%= yeoman.app %>/scripts/{,*/}*.js',
'!<%= yeoman.app %>/scripts/vendor/*',
'test/spec/{,*/}*.js'
]
},
mocha: {
all: {
options: {
run: true,
urls: ['http://localhost:<%= connect.options.port %>/index.html']
}
}
},
coffee: {
dist: {
files: [{
expand: true,
cwd: '<%= yeoman.app %>/scripts',
src: '{,*/}*.coffee',
dest: '.tmp/scripts',
ext: '.js'
}]
},
test: {
files: [{
expand: true,
cwd: 'test/spec',
src: '{,*/}*.coffee',
dest: '.tmp/spec',
ext: '.js'
}]
}
},
compass: {
options: {
sassDir: '<%= yeoman.app %>/styles',
cssDir: '.tmp/styles',
imagesDir: '<%= yeoman.app %>/images',
javascriptsDir: '<%= yeoman.app %>/scripts',
fontsDir: '<%= yeoman.app %>/styles/fonts',
importPath: 'app/components',
relativeAssets: true
},
dist: {},
server: {
options: {
debugInfo: true
}
}
},
// not used since Uglify task does concat,
// but still available if needed
/*concat: {
dist: {}
},*/
requirejs: {
dist: {
// Options: https://github.com/jrburke/r.js/blob/master/build/example.build.js
options: {
// `name` and `out` is set by grunt-usemin
baseUrl: 'app/scripts',
optimize: 'none',
// TODO: Figure out how to make sourcemaps work with grunt-usemin
// https://github.com/yeoman/grunt-usemin/issues/30
//generateSourceMaps: true,
// required to support SourceMaps
// http://requirejs.org/docs/errors.html#sourcemapcomments
preserveLicenseComments: false,
useStrict: true,
wrap: true,
//uglify2: {} // https://github.com/mishoo/UglifyJS2
}
}
},
rev: {
dist: {
files: {
src: [
'<%= yeoman.dist %>/scripts/{,*/}*.js',
'<%= yeoman.dist %>/styles/{,*/}*.css',
'<%= yeoman.dist %>/images/{,*/}*.{png,jpg,jpeg,gif,webp}',
'<%= yeoman.dist %>/styles/fonts/*'
]
}
}
},
useminPrepare: {
html: '<%= yeoman.app %>/index.html',
options: {
dest: '<%= yeoman.dist %>'
}
},
usemin: {
html: ['<%= yeoman.dist %>/{,*/}*.html'],
css: ['<%= yeoman.dist %>/styles/{,*/}*.css'],
options: {
dirs: ['<%= yeoman.dist %>']
}
},
imagemin: {
dist: {
files: [{
expand: true,
cwd: '<%= yeoman.app %>/images',
src: '{,*/}*.{png,jpg,jpeg}',
dest: '<%= yeoman.dist %>/images'
}]
}
},
svgmin: {
dist: {
files: [{
expand: true,
cwd: '<%= yeoman.app %>/images',
src: '{,*/}*.svg',
dest: '<%= yeoman.dist %>/images'
}]
}
},
cssmin: {
dist: {
files: {
'<%= yeoman.dist %>/styles/main.css': [
'.tmp/styles/{,*/}*.css',
'<%= yeoman.app %>/styles/{,*/}*.css'
]
}
}
},
htmlmin: {
dist: {
options: {
/*removeCommentsFromCDATA: true,
// https://github.com/yeoman/grunt-usemin/issues/44
//collapseWhitespace: true,
collapseBooleanAttributes: true,
removeAttributeQuotes: true,
removeRedundantAttributes: true,
useShortDoctype: true,
removeEmptyAttributes: true,
removeOptionalTags: true*/
},
files: [{
expand: true,
cwd: '<%= yeoman.app %>',
src: '*.html',
dest: '<%= yeoman.dist %>'
}]
}
},
// Put files not handled in other tasks here
copy: {
dist: {
files: [{
expand: true,
dot: true,
cwd: '<%= yeoman.app %>',
dest: '<%= yeoman.dist %>',
src: [
'*.{ico,txt}',
'.htaccess',
'images/{,*/}*.{webp,gif}',
'styles/fonts/*'
]
}]
}
},
concurrent: {
server: [
'coffee:dist',
'compass:server'
],
test: [
'coffee',
'compass'
],
dist: [
'coffee',
'compass:dist',
'imagemin',
'svgmin',
'htmlmin'
]
},
bower: {
options: {
exclude: ['modernizr']
},
all: {
rjsConfig: '<%= yeoman.app %>/scripts/main.js'
}
}
});
grunt.renameTask('regarde', 'watch');
grunt.registerTask('server', function (target) {
if (target === 'dist') {
return grunt.task.run(['build', 'open', 'connect:dist:keepalive']);
}
grunt.task.run([
'clean:server',
'concurrent:server',
'livereload-start',
'connect:livereload',
'open',
'watch'
]);
});
grunt.registerTask('test', [
'clean:server',
'concurrent:test',
'connect:test',
'mocha'
]);
grunt.registerTask('build', [
'clean:dist',
'useminPrepare',
'concurrent:dist',
'requirejs',
'cssmin',
'concat',
'uglify',
'copy',
'rev',
'usemin'
]);
grunt.registerTask('default', [
'jshint',
'test',
'build'
]);
};
The connect task in above code run its own server to serve the static pages.
And the livereload task refreshes the pages if any changes in the files that is mentioned in the watch:livereload task. Above code works well when you don't need/have your own server to serve pages.
Incase if you have your own server, then live reload must refresh the pages served from your own server. How can we do it?
Solution
You don't need default static server. So go and remove connect task from Gruntfile
connect: {
options: {
port: 9000,
// change this to '0.0.0.0' to access the server from outside
hostname: 'localhost'
},
livereload: {
options: {
middleware: function (connect) {
return [
lrSnippet,
mountFolder(connect, '.tmp'),
mountFolder(connect, 'app')
];
}
}
},
test: {
options: {
middleware: function (connect) {
return [
mountFolder(connect, '.tmp'),
mountFolder(connect, 'test')
];
}
}
},
dist: {
options: {
middleware: function (connect) {
return [
mountFolder(connect, 'dist')
];
}
}
}
},
Also remove connect:livereload and open from server task
grunt.task.run([
'clean:server',
'concurrent:server',
'livereload-start',
'connect:livereload', ==> Remove This line
'open', ==> Remove This line
'watch'
]);
Then add following scripts in your html files.
<!-- livereload script -->
<script type="text/javascript">
document.write('<script src="http://'
+ (location.host || 'localhost').split(':')[0]
+ ':35729/livereload.js?snipver=1" type="text/javascript"><\/script>')
</script>
Then run grunt server to watch and livereload
Now run your server and see the beauty of page refresh whenever you make changes in the file.
Happy Coding and Have a nice day.
Social sharing buttons becomes essential to all pages available on the web.
If you write blog, then you cannot avoid social buttons on your blog. I like to share the social sharing button snippets which I collected from web. I believe, anything is taken from web must be given back to web.
Twitter
<!-- Place this tag where you want the share button to render. -->
<a href="https://twitter.com/share" class="twitter-share-button">Tweet</a>
<!-- Place this tag after the last share tag -->
<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');</script>
Google Plus
<!-- Place this tag where you want the share button to render. -->
<div class="g-plus" data-action="share"></div>
<!-- Place this tag after the last share tag. -->
<script type="text/javascript">
(function() {
var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true;
po.src = 'https://apis.google.com/js/plusone.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s);
})();
</script>
Facebook Like
<!--Place the code for your plugin wherever you want the plugin to appear on your page. -->
<div class="fb-like" data-href="http://developers.facebook.com/docs/reference/plugins/like" data-send="true" data-width="450" data-show-faces="true"></div>
<!-- Include the JavaScript SDK on your page once, ideally right after the opening <body> tag. -->
<div id="fb-root"></div>
<script>(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) return;
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/en_US/all.js#xfbml=1";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>
Hacker News
<!-- Place this tag where you want the share button to render. -->
<a href="http://news.ycombinator.com/submit" class="hn-share-button">Vote on HN</a>
<!-- Place this tag after the last share tag -->
<script>
(function(d, t) {
var g = d.createElement(t),
s = d.getElementsByTagName(t)[0];
g.src = '//hnbutton.appspot.com/static/hn.min.js';
s.parentNode.insertBefore(g, s);
}(document, 'script'));
</script>
Reddit
<a href="http://www.reddit.com/submit" onclick="window.location = 'http://www.reddit.com/submit?url=' + encodeURIComponent(window.location); return false"> <img src="http://www.reddit.com/static/spreddit7.gif" alt="submit to reddit" border="0" /> </a>
If you want Reddit button with points, then
<script type="text/javascript" src="http://www.reddit.com/buttonlite.js?i=1"></script>
Kippt
I love to have all my favorites site in Kippt. Those who love kippt, this is for you.
<a href="https://kippt.com/save" class="kippt-save-button" data-url="https://kippt.com/karrisaarinen/" data-title="Karri Saarinen on Kippt" data-source="example.com">Save to Kippt</a>
<script>(function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="http://addons.kippt.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","kippt-wjs"));</script>
Linkedin
<script src="//platform.linkedin.com/in.js" type="text/javascript">
lang: en_US
</script>
<script type="IN/Share" data-counter="right"></script>
