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Why should a Java class implement comparable?
...>{
String firstName;
String lastName;
@Override
public int compareTo(Author other){
// compareTo should return < 0 if this is supposed to be
// less than other, > 0 if this is supposed to be greater than
// other and 0 if they are supposed to be equ...
how to make a specific text on TextView BOLD
... code : Spanned durationSpanned; if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N) { durationSpanned = Html.fromHtml(durationFormatted,Html.FROM_HTML_MODE_LEGACY); } else { durationSpanned = Html.fromHtml(durationFormatted); }
...
Should a return statement be inside or outside a lock?
...
Essentially, which-ever makes the code simpler. Single point of exit is a nice ideal, but I wouldn't bend the code out of shape just to achieve it... And if the alternative is declaring a local variable (outside the lock), initializing it (inside the lock) and then returning it (ou...
What is the “assert” function?
...Watch out! Depends on the function:
assert(foo());
// Here's a safer way:
int ret = foo();
assert(ret);
From the combination of the program calling abort() and not being guaranteed to do anything, asserts should only be used to test things that the developer has assumed rather than, for example, ...
Creating a UICollectionView programmatically
...
Header file:--
@interface ViewController : UIViewController<UICollectionViewDataSource,UICollectionViewDelegateFlowLayout>
{
UICollectionView *_collectionView;
}
Implementation File:--
- (void)viewDidLoad
{
[super viewDidLo...
Maximum number of threads in a .NET app?
...threads is, you are probably doing something wrong.
[Update: Just out of interest: .NET Thread Pool default numbers of threads:
1023 in Framework 4.0 (32-bit environment)
32767 in Framework 4.0 (64-bit environment)
250 per core in Framework 3.5
25 per core in Framework 2.0
(These numbers may v...
Why was “Avoid Enums Where You Only Need Ints” removed from Android's performance tips?
The section "Avoid Enums Where You Only Need Ints" was removed from the official developer documentation . (See Why doesn't Android use more enums? for the old section content)
...
Make a borderless form movable?
...CodeProject details a technique. Is basically boils down to:
public const int WM_NCLBUTTONDOWN = 0xA1;
public const int HT_CAPTION = 0x2;
[System.Runtime.InteropServices.DllImport("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
[System.Runtime.Int...
To ternary or not to ternary? [closed]
...
Use it for simple expressions only:
int a = (b > 10) ? c : d;
Don't chain or nest ternary operators as it hard to read and confusing:
int a = b > 10 ? c < 20 ? 50 : 80 : e == 2 ? 4 : 8;
Moreover, when using ternary operator, consider formatting th...
Cleaning `Inf` values from an R dataframe
...ar)
dat %>% rationalize()
Which return a data frame with all Inf are converted to NA.
Timings compared to some above solutions. Code:
library(hablar)
library(data.table)
dat <- data.frame(a = rep(c(1,Inf), 1e6), b = rep(c(Inf,2), 1e6),
c = rep(c('a','b'),1e6),d = rep(c(...