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Error “initializer element is not constant” when trying to initialize variable with const
...nst char * str2 = str1;
In fact, a "const char *" string is not a compile-time constant, so it can't be an initializer. But a "const char * const" string is a compile-time constant, it should be able to be an initializer. I think this is a small drawback of CLang.
A function name is of course a co...
How to check if a line is blank using regex
... @adamlogan yeah, from memory, I think I wanted to do it at the time, but I didn't have enough reputation to comment on someone else's post, so had to do it like this.
– John Henry
Jun 27 '18 at 1:41
...
Declaring an unsigned int in Java
...gned can break CRC calculations etc. It's not a show stopper, just wasted time.
– Lorne K
Aug 25 '16 at 15:21
3
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Asynchronous method call in Python?
...an use enhanced generators for async functions.
import asyncio
import datetime
Enhanced generator syntax:
@asyncio.coroutine
def display_date(loop):
end_time = loop.time() + 5.0
while True:
print(datetime.datetime.now())
if (loop.time() + 1.0) >= end_time:
...
Bash Script: count unique lines in file
...t file:
$ for i in {1..100000}; do echo $RANDOM; done > random.txt
$ time sort random.txt | uniq | wc -l
31175
real 0m1.193s
user 0m0.701s
sys 0m0.388s
$ time awk '!seen[$0]++' random.txt | wc -l
31175
real 0m0.675s
user 0m0.108s
sys 0m0.171s
...
Pretty git branch graphs
...decorate --oneline --graph
Not everyone would be doing a git log all the time, but when you need it just remember:
"A Dog" = git log --all --decorate --oneline --graph
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Save An Image To Application Documents Folder From UIView On IOS
...ragma mark - Generate Random Number
- (NSString *)getRandomNumber {
NSTimeInterval time = ([[NSDate date] timeIntervalSince1970]); // returned as a double
long digits = (long)time; // this is the first 10 digits
int decimalDigits = (int)(fmod(time, 1) * 1000); // this will get the 3 mis...
Direct casting vs 'as' operator?
...r then check for null and correct type) This is helpful since a lot of the time you would rather throw a custom one exception. But it is very true that blind as calls are bad.
– Guvante
Sep 25 '08 at 10:48
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What is the C# equivalent of NaN or IsNumeric?
...{0}] is an invalid App Version! Only numeric values are supported at this time.", softwareVersion));
}
Hope, this helps and good luck!
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Where IN clause in LINQ [duplicate]
... @Jurg It's pretty frequently required, no? I use it all the time. Works fine for Linq to Objects, havent tried for IQueryables.
– nawfal
Jan 27 '16 at 11:15
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