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How do I avoid capturing self in blocks when implementing an API?
... If you're not using Automatic Reference Counting (ARC), you can do this:
__block MyDataProcessor *dp = self;
self.progressBlock = ^(CGFloat percentComplete) {
[dp.delegate myAPI:dp isProcessingWithProgress:percentComplete];
}
The __block keyword marks variables that can be modified inside th...
Detecting endianness programmatically in a C++ program
...e warned against by compiler. That's exactly what unions are for !
bool is_big_endian(void)
{
union {
uint32_t i;
char c[4];
} bint = {0x01020304};
return bint.c[0] == 1;
}
The principle is equivalent to the type case as suggested by others, but this is clearer - and...
Linq to Sql: Multiple left outer joins
...SQL:
Dim db As New ContractDataContext()
Dim query = From o In db.Orders _
Group Join v In db.Vendors _
On v.VendorNumber Equals o.VendorNumber _
Into ov = Group _
From x In ov.DefaultIfEmpty() _
Group Join s In db.Status _
On...
Access data in package subdirectory
...
You can use __file__ to get the path to the package, like this:
import os
this_dir, this_filename = os.path.split(__file__)
DATA_PATH = os.path.join(this_dir, "data", "data.txt")
print open(DATA_PATH).read()
...
Remove a cookie
...
You May Try this
if (isset($_COOKIE['remember_user'])) {
unset($_COOKIE['remember_user']);
setcookie('remember_user', null, -1, '/');
return true;
} else {
return false;
}
...
Most Pythonic way to provide global configuration variables in config.py? [closed]
...ot",
"pass": "secret",
"tables": {
"users": "tb_users"
}
# etc
}
}
You'd access the values as follows:
config["mysql"]["tables"]["users"]
If you are willing to sacrifice the potential to compute expressions inside your config tree, you could use...
/usr/lib/libstdc++.so.6: version `GLIBCXX_3.4.15' not found
How can I get GLIBCXX_3.4.15 in Ubuntu? I can't run some programs that I'm compiling.
19 Answers
...
Create an empty list in python with certain size
...
you can do this: a = [0 for _ in range(10)]
– Kamiar
Dec 19 '18 at 21:55
...
In C#, should I use string.Empty or String.Empty or “” to intitialize a string?
...1
.locals init ([0] string test1,
[1] string test11)
IL_0000: nop
IL_0001: ldsfld string [mscorlib]System.String::Empty
IL_0006: stloc.0
IL_0007: ldloc.0
IL_0008: stloc.1
IL_0009: ret
} // end of method Form1::Test1
.method private hidebysig instance void ...
Scala how can I count the number of occurrences in a list
...", "banana", "apple", "oranges", "oranges")
s.groupBy(identity).mapValues(_.size)
giving a Map with a count for each item in the original sequence:
Map(banana -> 1, oranges -> 3, apple -> 3)
The question asks how to find the count of a specific item. With this approach, the solution w...