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json string to json object filter added #257

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json string to json object filter added #257

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55 changes: 31 additions & 24 deletions lib/filters.js
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Original file line number Diff line number Diff line change
Expand Up @@ -8,23 +8,23 @@
* First element of the target `obj`.
*/

exports.first = function(obj) {
exports.first = function (obj) {
return obj[0];
};

/**
* Last element of the target `obj`.
*/

exports.last = function(obj) {
exports.last = function (obj) {
return obj[obj.length - 1];
};

/**
* Capitalize the first letter of the target `str`.
*/

exports.capitalize = function(str){
exports.capitalize = function (str) {
str = String(str);
return str[0].toUpperCase() + str.substr(1, str.length);
};
Expand All @@ -33,32 +33,32 @@ exports.capitalize = function(str){
* Downcase the target `str`.
*/

exports.downcase = function(str){
exports.downcase = function (str) {
return String(str).toLowerCase();
};

/**
* Uppercase the target `str`.
*/

exports.upcase = function(str){
exports.upcase = function (str) {
return String(str).toUpperCase();
};

/**
* Sort the target `obj`.
*/

exports.sort = function(obj){
exports.sort = function (obj) {
return Object.create(obj).sort();
};

/**
* Sort the target `obj` by the given `prop` ascending.
*/

exports.sort_by = function(obj, prop){
return Object.create(obj).sort(function(a, b){
exports.sort_by = function (obj, prop) {
return Object.create(obj).sort(function (a, b) {
a = a[prop], b = b[prop];
if (a > b) return 1;
if (a < b) return -1;
Expand All @@ -70,55 +70,55 @@ exports.sort_by = function(obj, prop){
* Size or length of the target `obj`.
*/

exports.size = exports.length = function(obj) {
exports.size = exports.length = function (obj) {
return obj.length;
};

/**
* Add `a` and `b`.
*/

exports.plus = function(a, b){
exports.plus = function (a, b) {
return Number(a) + Number(b);
};

/**
* Subtract `b` from `a`.
*/

exports.minus = function(a, b){
exports.minus = function (a, b) {
return Number(a) - Number(b);
};

/**
* Multiply `a` by `b`.
*/

exports.times = function(a, b){
exports.times = function (a, b) {
return Number(a) * Number(b);
};

/**
* Divide `a` by `b`.
*/

exports.divided_by = function(a, b){
exports.divided_by = function (a, b) {
return Number(a) / Number(b);
};

/**
* Join `obj` with the given `str`.
*/

exports.join = function(obj, str){
exports.join = function (obj, str) {
return obj.join(str || ', ');
};

/**
* Truncate `str` to `len`.
*/

exports.truncate = function(str, len, append){
exports.truncate = function (str, len, append) {
str = String(str);
if (str.length > len) {
str = str.slice(0, len);
Expand All @@ -131,7 +131,7 @@ exports.truncate = function(str, len, append){
* Truncate `str` to `n` words.
*/

exports.truncate_words = function(str, n){
exports.truncate_words = function (str, n) {
var str = String(str)
, words = str.split(/ +/);
return words.slice(0, n).join(' ');
Expand All @@ -141,15 +141,15 @@ exports.truncate_words = function(str, n){
* Replace `pattern` with `substitution` in `str`.
*/

exports.replace = function(str, pattern, substitution){
exports.replace = function (str, pattern, substitution) {
return String(str).replace(pattern, substitution || '');
};

/**
* Prepend `val` to `obj`.
*/

exports.prepend = function(obj, val){
exports.prepend = function (obj, val) {
return Array.isArray(obj)
? [val].concat(obj)
: val + obj;
Expand All @@ -159,7 +159,7 @@ exports.prepend = function(obj, val){
* Append `val` to `obj`.
*/

exports.append = function(obj, val){
exports.append = function (obj, val) {
return Array.isArray(obj)
? obj.concat(val)
: obj + val;
Expand All @@ -169,8 +169,8 @@ exports.append = function(obj, val){
* Map the given `prop`.
*/

exports.map = function(arr, prop){
return arr.map(function(obj){
exports.map = function (arr, prop) {
return arr.map(function (obj) {
return obj[prop];
});
};
Expand All @@ -179,7 +179,7 @@ exports.map = function(arr, prop){
* Reverse the given `obj`.
*/

exports.reverse = function(obj){
exports.reverse = function (obj) {
return Array.isArray(obj)
? obj.reverse()
: String(obj).split('').reverse().join('');
Expand All @@ -189,13 +189,20 @@ exports.reverse = function(obj){
* Get `prop` of the given `obj`.
*/

exports.get = function(obj, prop){
exports.get = function (obj, prop) {
return obj[prop];
};

/**
* Packs the given `obj` into json string
*/
exports.json = function(obj){
exports.stringify = function (obj) {
return JSON.stringify(obj);
};

/**
* Packs the given `json string` into json Object
*/
exports.json = function (obj) {
return JSON.parse(obj);
};