khoand0000

Vietnamese characters, .cleanDiacritics

• don't convert characters:ậ, ạ, ấ, ậ, ủ, ứ, ờ, ủ, ...
• convert characters: ì, â, ò, ú, ì, á, ó, ô, à, è, ...

I will implement .cleanDiacritics for Vietnamese soon

Vietnamese characters table: https://en.wikipedia.org/wiki/Vietnamese_Standard_Code_for_Information_Interchange

khoand0000

When you need using functions from _.string for _.js chaining

_.mixin(s.exports());

But I think you should do if using both because chaining with _.string will soon occur. Unless you want keep _.string independently and no chaining with _.string.

khoand0000

_.mixin({
    mapObjectWithKeys: mapObjectWithKeys
});


/////////////////////

/**
 * is similar to `.mapObject` but just apply `iteratee` for properties have key in `keys`
 * Eg:

khoand0000

	.groupBy	.partition
Same	split array follow given condition	same
Difference	return >= 1 set	return <= 2 sets
Return	object with each item is key: Array	Array with 2 items [Array, Array]

khoand0000

	.groupBy	.indexBy
return type	object	object
each key:value, value type is	array (contains values from original list)	value from original list
if value has same key	group	override; keep last value

Example: .indexBy

var stooges = [{name: 'moe', age: 40}, {name: 'larry', age: 50}, {name: 'curly', age: 50}];
_.indexBy(stooges, 'age');

khoand0000

I have array of objects like that

var arr = [
  { id: 4, name: 'John'},
  { id: 7, name: 'Mary'}
];

I want to convert it to object like that

{

khoand0000

There are 2 libraries I am using, depend on your situation

	[accounting.js]	[_.string]
number formatting	yes	yes
currency support	yes	no
string manipulating	no	yes
size	smaller	larger
suit to	need currency support and don't need to string manipulating (rarely)	almost cases, should use it

khoand0000

_.invoke() vs. _.each() vs. _.map(): read http://stackoverflow.com/questions/13193959/difference-between-underscore-js-each-method-and-invoke-method

• _.invoke(list, methodName, *arguments) methodName is string, is function belongs to object object.methodName(...). return result as _.map()
• _.each(list, iteratee, [context]) iteratee is not string (a function name). iteratee is called for each object/item as its parameter iteratee(object). return no result
• _.map(list, iteratee, [context]) like _.each(), apply iteratee for each item iteratee(object), but difference is that return result

khoand0000

I have a object

var obj = {
  1: [5, 7, 8],
  7: [4, 2],
  10: [],
  19: [4]
}; // each key:value is id: array

khoand0000

Why do I need to write posts/notes? How do I increase my code speed?

Because they help me write code faster. You will wonder that why is faster? They take me more time to do another thing instead of focus writing code. I though it is as you are thinking. Let me sharing my experience about it.

I have many experience years about programming, almost problems I can solve them by using my knowledge, experience and google, ofcourse. But my solving issues speed is not fast as I expected even I solved them before. One year ago, I realized my problem from recent projects and find down why. There are points I found:

1. Don't keep any solution somewhere.

What action do I face a problem/issue? Check the issue I have met or not

• If I haven't met it before, depend on its complex