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mirror of https://github.com/ascribe/onion.git synced 2024-12-23 09:50:31 +01:00
onion/js/utils/general_utils.js
2015-06-04 15:38:15 +02:00

94 lines
2.3 KiB
JavaScript

// TODO: Create Unittests that test all functions
export function sanitize(obj) {
Object
.keys(obj)
.map((key) => {
// By matching null with a double equal, we can match undefined and null
// http://stackoverflow.com/a/15992131
if(obj[key] == null || obj[key] === '') {
delete obj[key];
}
});
return obj;
};
/**
* Returns the values of an object.
*/
export function valuesOfObject(obj) {
return Object
.keys(obj)
.map(key => obj[key]);
};
/**
* Sums up a list of numbers. Like a Epsilon-math-kinda-sum...
*/
export function sumNumList(l) {
let sum = 0;
l.forEach((num) => sum += parseFloat(num) || 0);
return sum;
};
/*
Taken from http://stackoverflow.com/a/4795914/1263876
Behaves like C's format string function
*/
export function formatText() {
var args = arguments,
string = args[0],
i = 1;
return string.replace(/%((%)|s|d)/g, function (m) {
// m is the matched format, e.g. %s, %d
var val = null;
if (m[2]) {
val = m[2];
} else {
val = args[i];
// A switch statement so that the formatter can be extended. Default is %s
switch (m) {
case '%d':
val = parseFloat(val);
if (isNaN(val)) {
val = 0;
}
break;
}
i++;
}
return val;
});
};
/**
* Takes a list of object and merges their keys to one object.
* Uses mergeOptions for two objects.
* @param {[type]} l [description]
* @return {[type]} [description]
*/
export function mergeOptions(...l) {
let newObj = {};
for(let i = 1; i < l.length; i++) {
newObj = _mergeOptions(newObj, _mergeOptions(l[i-1], l[i]));
}
return newObj;
};
/**
* Overwrites obj1's values with obj2's and adds obj2's if non existent in obj1
* @param obj1
* @param obj2
* @returns obj3 a new object based on obj1 and obj2
* Taken from: http://stackoverflow.com/a/171256/1263876
*/
function _mergeOptions(obj1,obj2){
var obj3 = {};
for (var attrname in obj1) { obj3[attrname] = obj1[attrname]; }
for (var attrname in obj2) { obj3[attrname] = obj2[attrname]; }
return obj3;
};