diff --git a/README.markdown b/README.markdown index 3d564fb..5d039f0 100644 --- a/README.markdown +++ b/README.markdown @@ -2,7 +2,7 @@ *If you use Jsawk and want to help maintain it, please let me know and I'll add you to the repo.* -[Updated underscore.js to v1.6.0.](http://documentcloud.github.com/underscore/) +[Updated underscore.js to v1.8.2.](http://documentcloud.github.com/underscore/) Jsawk is like awk, but for JSON. You work with an array of JSON objects read from stdin, filter them using JavaScript to produce a results array @@ -18,10 +18,10 @@ increase your processing power, and other things. [This is a great blog post on setup and basic use of jsawk and resty, thanks to @johnattebury.](http://johnattebury.com/blog/2011/06/spidermonkey-jsawk-resty-on-snow-leopard/) -You need to have the `js` interpreter installed. Your best bet is to navigate to -the mozilla site [download and build the source](https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey) +You need to have the `js` interpreter installed. Your best bet is to navigate to +the mozilla site [download and build the source](https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey) based on the maintained documentation there. - + Ready? Go. ## Install @@ -79,7 +79,7 @@ the resource. -j Specify path to spidermonkey js binary. - + -n Suppress printing of JSON result set. @@ -90,7 +90,7 @@ the resource. -s Use `string` for input JSON instead of stdin. - + -v Set global variable `name` to `value` in the script environment. @@ -303,7 +303,7 @@ JSON-to-JSON Transformations These examples transform the input JSON, modifying it and returning the modified JSON as output on stdout to be piped elsewhere. Transformations of -this type are generally done with a script that follows one of these simple +this type are generally done with a script that follows one of these simple patterns: 1. Modify the `this` object in place (no `return` statement necessary). @@ -360,8 +360,8 @@ return value in the output set. ### JSON Grep: Select Certain Elements From Input ### Sometimes you want to use awk to select certain records from the input set, -leaving the rest unchanged. This is like the `grep` pattern of operation. In -this example we will extract all the records corresponding to people who are +leaving the rest unchanged. This is like the `grep` pattern of operation. In +this example we will extract all the records corresponding to people who are over 30 years old. cat /tmp/t | jsawk 'if (this.age <= 30) return null' @@ -377,7 +377,7 @@ a whole, somewhat similar to the way aggregate functions like `SUM()` or `COUNT()` work in SQL. These types of operations fall under a few basic patterns. - 1. Use a before script (`-b` option) to do things to the JSON input before + 1. Use a before script (`-b` option) to do things to the JSON input before transformations are done by the main script. 2. Use an after script (`-a` option) to do things to the JSON result set after all transformations are completed by the main script. @@ -430,7 +430,7 @@ alphabetically. Notice the use of JSONQuery to drill down into the JSON objects, an "after" script to collate the results, and everything piped to the Unix `sort` -tool to remove duplicate entries and do the lexical ordering. This is +tool to remove duplicate entries and do the lexical ordering. This is starting to show the power of the awk-like behavior now. ### Return a Boolean Value @@ -448,8 +448,8 @@ zero for success. JSON Pretty-Printing ==================== -[Resty](http://github.com/micha/resty) includes the `pp` script that will -pretty-print JSON for you. You just need to install the JSON perl module +[Resty](http://github.com/micha/resty) includes the `pp` script that will +pretty-print JSON for you. You just need to install the JSON perl module from CPAN. 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sourceMappingURL=underscore-min.map (function() { @@ -223,8 +223,8 @@ var vsprintf = function(fmt, argv) { Copyright Jason E. Smith 2008 Licensed under the Apache License, Version 2.0 (the "License"); You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 */ - - + + /* * CREDITS: * Thanks to Kris Zyp from SitePen for contributing his source for @@ -245,11 +245,11 @@ You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2 JSONQuery(queryString)(object) always return identical results. The first one immediately evaluates, the second one returns a function that then evaluates the object. - + example: JSONQuery("foo",{foo:"bar"}) This will return "bar". - + example: evaluator = JSONQuery("?foo='bar'&rating>3"); This creates a function that finds all the objects in an array with a property @@ -258,24 +258,24 @@ You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2 evaluator([{foo:"bar",rating:4},{foo:"baz",rating:2}]) This returns: {foo:"bar",rating:4} - + example: evaluator = JSONQuery("$[?price<15.00][\rating][0:10]"); This finds objects in array with a price less than 15.00 and sorts then by rating, highest rated first, and returns the first ten items in from this filtered and sorted list. - - - example: + + + example: var data = {customers:[ {name:"Susan", purchases:29}, - {name:"Kim", purchases:150}, + {name:"Kim", purchases:150}, {name:"Jake", purchases:27} ]}; - + var results = json.JSONQuery("$.customers[?purchases > 21 & name='Jake'][\\purchases]",data); - results - + results + returns customers sorted by higest number of purchases to lowest. */ @@ -286,22 +286,22 @@ You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2 var len = arr.length; if (typeof fun != "function") throw new TypeError(); - + var res = new Array(len); var thisp = arguments[2]; for (var i = 0; i < len; i++) { if (i in arr) res[i] = fun.call(thisp, arr[i], i, arr); } - + return res; } - + function filter(arr, fun /*, thisp*/){ var len = arr.length; if (typeof fun != "function") throw new TypeError(); - + var res = new Array(); var thisp = arguments[2]; for (var i = 0; i < len; i++) { @@ -311,11 +311,11 @@ You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2 res.push(val); } } - + return res; }; - - + + function slice(obj,start,end,step){ // handles slice operations: [3:6:2] var len=obj.length,results = []; @@ -347,7 +347,7 @@ You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2 // if we don't have a name we are just getting all the properties values (.* or [*]) results.push(val); }else if(val && typeof val == 'object'){ - + walk(val); } } @@ -369,7 +369,7 @@ You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2 } return results; } - + function distinctFilter(array, callback){ // does the filter with removal of duplicates in O(n) var outArr = []; @@ -460,9 +460,9 @@ You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2 // function or the evaluator function. // * +, -, /, *, &, |, %, (, ), <, >, <=, >=, != - These operators behave just as they do // in JavaScript. - // - // - // + // + // + // // | dojox.json.query(queryString,object) // and // | dojox.json.query(queryString)(object) @@ -488,7 +488,7 @@ You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2 // by rating, highest rated first, and returns the first ten items in from this // filtered and sorted list. tokens = []; - var depth = 0; + var depth = 0; var str = []; query = query.replace(/"(\\.|[^"\\])*"|'(\\.|[^'\\])*'|[\[\]]/g,function(t){ depth += t == '[' ? 1 : t == ']' ? -1 : 0; // keep track of bracket depth @@ -510,7 +510,7 @@ You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2 query.replace(/(\]|\)|push|pop|shift|splice|sort|reverse)\s*\(/,function(){ throw new Error("Unsafe function call"); }); - + query = query.replace(/([^=]=)([^=])/g,"$1=$2"). // change the equals to comparisons replace(/@|(\.\s*)?[a-zA-Z\$_]+(\s*:)?/g,function(t){ return t.charAt(0) == '.' ? t : // leave .prop alone @@ -562,15 +562,15 @@ You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2 return a == ']' ? ']' : str[a]; }); // create a function within this scope (so it can use expand and slice) - + var executor = eval("1&&function($,$1,$2,$3,$4,$5,$6,$7,$8,$9){var $obj=$;return " + query + "}"); for(var i = 0;i