大约有 17,000 项符合查询结果（耗时：0.0335秒） [XML]
Cocoa Core Data efficient way to count entities
... = [NSEntityDescription entityForName:@"YourEntity" inManagedObjectContext:_managedObjectContext];
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
[fetchRequest setEntity:entity];
[fetchRequest setIncludesPropertyValues:NO];
[fetchRequest setIncludesSubentities:NO];
NSError *error = ni...
How can I declare and define multiple variables in one line using C++?
...they just happen to be the same type now but don't really need to be (uint8_t height, width; might turn into uint8_t height; uint16_t width; in the future and should have been uint8_t height; uint8_t width; to begin with).
– altendky
Jun 17 '15 at 15:08
...
JavaScript, elegant way to check nested object properties for null/undefined [duplicate]
...
I wish lodash would and a function for this._.has is the closest but doesn't check the value.
– GFoley83
Jul 28 '16 at 2:55
7
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How do I get both STDOUT and STDERR to go to the terminal and a log file?
...;(tee -a $HOME/logfile) 2>&1
# Test redirection of STDOUT
echo test_stdout
# Test redirection of STDERR
ls test_stderr___this_file_does_not_exist
(Note: This only works with Bash. It will not work with /bin/sh.)
Adapted from here; the original did not, from what I can tell, catch STDE...
Accessing an SQLite Database in Swift
...nent("test.sqlite")
// open database
var db: OpaquePointer?
guard sqlite3_open(fileURL.path, &db) == SQLITE_OK else {
print("error opening database")
sqlite3_close(db)
db = nil
return
}
Note, I know it seems weird to close the database upon failure to open, but the sqlite3_op...
Why so red? IntelliJ seems to think every declaration/method cannot be found/resolved
...nfigure
In my case, the JDK path was incorrect (pointed on /opt/jdk1.7.0_51 instead of /opt/jdk1.7.0_65)
Click on the ... and browse to the right JDK path
Let's clear the cache:
And everything should be back to life :)
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UITapGestureRecognizer - single tap and double tap
...UITapGestureRecognizer(target: self, action:#selector(self.singleTapAction(_:)))
singleTap.numberOfTapsRequired = 1
view.addGestureRecognizer(singleTap)
let doubleTap = UITapGestureRecognizer(target: self, action:#selector(self.doubleTapAction(_:)))
doubleTap.numberOfTapsRequired = 2
view.addGestur...
Entity Framework DateTime and UTC
...lass DateTimeKindAttribute : Attribute
{
private readonly DateTimeKind _kind;
public DateTimeKindAttribute(DateTimeKind kind)
{
_kind = kind;
}
public DateTimeKind Kind
{
get { return _kind; }
}
public static void Apply(object entity)
{
...
Where is Java Installed on Mac OS X?
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Use /usr/libexec/java_home -v 1.8 command on a terminal shell to figure out where is your Java 1.8 home directory
If you just want to find out the home directory of your most recent version of Java, omit the version. e.g. /usr/libexec/java_home
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Installing PIL with pip
...4 bit platforms, the linked path needs to be different -- e.g. /usr/lib/x86_64-linux-gnu/libfreetype.so . For a more architecture independent solution, create the links like # ln -s /usr/lib/`uname -i`-linux-gnu/libfreetype.so /usr/lib/
– Mark Chackerian
May 1...