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Hash function that produces short hashes?
...mospunk: encoding with base64 does nothing for collision resistance, since if hash(a) collides with hash(b) then base64(hash(a)) also collides with base64(hash(b)).
– Greg Hewgill
Nov 12 '13 at 18:37
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Reverting to a specific commit based on commit id with Git? [duplicate]
...r repo to that state? Or you just want your local repo to look like that?
if you do
git reset --hard c14809fa
It will make your local code and local history be just like it was at that commit. But then if you wanted to push this to someone else who has the new history, it would fail.
if you do...
Rails :dependent => :destroy VS :dependent => :delete_all
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The difference is with the callback.
The :delete_all is made directly in your application and deletes by SQL :
DELETE * FROM users where compagny_id = XXXX
With the :destroy, there is an instantiation of all of your children. ...
Adding a directory to $LOAD_PATH (Ruby)
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I would say go with $:.unshift File.dirname(__FILE__) over the other one, simply because I've seen much more usage of it in code than the $LOAD_PATH one, and it's shorter too!
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数据结构与本地数据库 07：错题记录、事务与统计图 · App Inventor 2 中文网
...编号 = SQLite1.SelectSQL("SELECT v FROM meta WHERE k=?",list("next_id"))
if length(已存编号) > 0 { 下个ID = max(下个ID, 已存编号[1] * 1) }
foreach 行 in 行们 {
listadd(卡片, makedict(pair("id", 行[1]), pair("question", 行[2]), pair("answer", 行[3]), pair("category", 行[4]), pa...
Looping through array and removing items, without breaking for loop
... to remove an item, I then get that 'seconds' is undefined. I could check if it's undefined, but I feel there's probably a more elegant way to do this. The desire is to simply delete an item and keep on going.
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Git branching strategy integated with testing/QA process
...op branch on feature we normally don't expect too many conflicts. However, if that's the case the developer can help. This is a tricky step, I think the best way to avoid it is to keep features as small/specific as possible. Different features have to be eventually merged, one way or another. Of cou...
Javascript Equivalent to C# LINQ Select
...orted in older browsers, I suggest that you stick with the jQuery method.
If you prefer the other one for some reason you could always add a polyfill for old browser support.
You can always add custom methods to the array prototype as well:
Array.prototype.select = function(expr){
var arr = t...
How to make a JTable non-editable
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While the approach you specify works, there is no such method as isEditable in the AbstractTableModel. What exists is the method isCellEditable(int,int) which takes rowIndex and coulmnIndex as parameters. The user can selectively enable/disable editing...
Graph Algorithm To Find All Connections Between Two Arbitrary Vertices
...nly uses as much memory as it needs to).
I noticed that the graph you specified above has only one edge that is directional (B,E). Was this a typo or is it really a directed graph? This solution works regardless. Sorry I was unable to do it in C, I'm a bit weak in that area. I expect that you will ...