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How to determine the longest increasing subsequence using dynamic programming?
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It doesn't matter. If DP[j] + 1 == DP[i] then DP[i] won't become better with DP[i] = DP[j] + 1. We are trying to optimize DP[i].
– Petar Minchev
Nov 2 '12 at 9:10
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How to write iOS app purely in C
...(source here). The files below have no headers, do not link to Cocoa, nor does the project have a nib:
AppDelegate.m
#include <objc/runtime.h>
#include <objc/message.h>
extern id NSApp;
struct AppDel
{
Class isa;
//Will be an NSWindow later, for now, it's id, because we can...
Asking the user for input until they give a valid response
...er a number: b
Sorry, I didn't understand that.
Enter a number: 1
1
How does it work?
prompts = chain(["Enter a number: "], repeat("Not a number! Try again: "))
This combination of itertools.chain and itertools.repeat will create an iterator
which will yield strings "Enter a number: " once, an...
How do I properly clean up Excel interop objects?
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Excel does not quit because your application is still holding references to COM objects.
I guess you're invoking at least one member of a COM object without assigning it to a variable.
For me it was the excelApp.Worksheets object...
Releasing memory in Python
...by more -- even a lot more -- than the block that you free.
In 3.x range doesn't create a list, so the test above won't create 10 million int objects. Even if it did, the int type in 3.x is basically a 2.x long, which doesn't implement a freelist.
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Optimise PostgreSQL for fast testing
...oing to turn fsync off can also turn full_page_writes off, as it no longer does any good then. Beware that fsync=off and full_page_writes apply at the cluster level, so they affect all databases in your PostgreSQL instance.
For production use you can possibly use synchronous_commit=off and set a co...
Making custom right-click context menus for my web-app
...u, and I'm now sure exactly how they do it. I found a jQuery plugin that does this, but I'm still curious about a few things:
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Where do you store your salt strings?
... a brute-force attack to obtain a password that matches the hash, since he doesn't know the hash to begin with and has no way to know which parts of the data are parts of the salt, or parts of the salted-password hash (unless he does know your application's authentication logic).
If the salted-pass...
How to develop a soft keyboard for Android? [closed]
...ou will not have a
// cursor, and no 'edittext.setCursorVisible(true)' doesn't work )
edittext.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
EditText edittext = (EditText) v;
int inType = editt...
How to make a great R reproducible example
...(myData)
Details:
This function is an intelligent wrapper to dput and does the following:
automatically samples a large data set (based on size and class. Sample size can be adjusted)
creates a dput output
allows you to specify which columns to export
appends to the front of it objName <- ...