大约有 19,000 项符合查询结果（耗时：0.0364秒） [XML]
Detect if the app was launched/opened from a push notification
...pplication wake up most recently?
func applicationWillEnterForeground(_ application: UIApplication) {
// time stamp the entering of foreground so we can tell how we got here
wakeTime = Date()
}
func application(_ application: UIApplication, didReceiveRemoteNotification userIn...
Why is creating a Thread said to be expensive?
...of OpenJDK 6 on Linux, the thread stack is allocated by the call to pthread_create that creates the native thread. (The JVM does not pass pthread_create a preallocated stack.)
Then, within pthread_create the stack is allocated by a call to mmap as follows:
mmap(0, attr.__stacksize,
PROT_REA...
Cannot use ref or out parameter in lambda expressions
... if (tokenDefinition.LeftDenotation != null)
token._led = tokenDefinition.LeftDenotation(token);
if (tokenDefinition.NullDenotation != null)
token._nud = tokenDefinition.NullDenotation(token);
token.Identifier = tokenDefinition.Identifi...
Symbolicating iPhone App Crash Reports
...above (using cd command)
Run atos -arch armv7 -o APPNAME.app/APPNAME MEMORY_LOCATION_OF_CRASH. The memory location should be the one at which the app crashed as per the report.
Ex: atos -arch armv7 -o 'APPNAME.app'/'APPNAME' 0x0003b508
This would show you the exact line, method name which resul...
How to test that no exception is thrown?
...write, will work.
Such a method call can look like this: existingUserById_ShouldReturn_UserObject. If this method fails (e.g.: an exception is thrown) then you know something went wrong and you can start digging.
By adding another test (nonExistingUserById_ShouldThrow_IllegalArgumentException) th...
What does .SD stand for in data.table in R
... may help you see what .SD is:
DT[ , .SD[ , paste(x, v, sep="", collapse="_")], by=y]
# y V1
# 1: 1 a1_b3_c5
# 2: 3 a2_b4_c6
Basically, the by=y statement breaks the original data.table into these two sub-data.tables
DT[ , print(.SD), by=y]
# <1st sub-data.table, called '.SD' while i...
Parse usable Street Address, City, State, Zip from a string [closed]
...nteger = 0 To streetMarkerIndex
If IsNumeric(splitString(counter)) _
Or splitString(counter).ToString.ToLower = "po" _
Or splitString(counter).ToString().ToLower().Replace(".", "") = "po" Then
addressIndex = counter
Exit For
End If
...
Adding an arbitrary line to a matplotlib plot in ipython notebook
...e taken in account in the legend by adding a label argument starting with "_". Ex: plt.plot([70, 70], [100, 250], 'k-', lw=2, label="_not in legend")
– gcalmettes
Oct 29 '16 at 5:40
...
Shall we always use [unowned self] inside closure in Swift
...rmance sensitive weak vars to unowned now.
– original_username
Jul 14 '16 at 9:45
"The closure lifetime is independent...
Does Java SE 8 have Pairs or Tuples?
...
public static void main(String[] args) {
boolean [][] directed_acyclic_graph = new boolean[][]{
{false, true, false, true, false, true},
{false, false, false, true, false, true},
{false, false, false, true, false, true},
...