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String.replaceAll single backslashes with double backslashes
I'm trying to convert the String \something\ into the String \\something\\ using replaceAll , but I keep getting all kinds of errors. I thought this was the solution:
...
Hashing a dictionary?
...thon 3.3 returns different results between sessions). make_hashable() will convert the object into nested tuples and make_hash_sha256() will also convert the repr() to a base64 encoded SHA256 hash.
import hashlib
import base64
def make_hash_sha256(o):
hasher = hashlib.sha256()
hasher.updat...
What is the “continue” keyword and how does it work in Java?
...
Let's see an example:
int sum = 0;
for(int i = 1; i <= 100 ; i++){
if(i % 2 == 0)
continue;
sum += i;
}
This would get the sum of only odd numbers from 1 to 100.
...
MySQL error: key specification without a key length
... TEXT(88) simply won’t work.
The error will also pop up when you try to convert a table column from non-TEXT and non-BLOB type such as VARCHAR and ENUM into TEXT or BLOB type, with the column already been defined as unique constraints or index. The Alter Table SQL command will fail.
The solution...
iOS: How to get a proper Month name from a number?
...
Another option is to use the monthSymbols method:
int monthNumber = 11; //November
NSDateFormatter *df = [[[NSDateFormatter alloc] init] autorelease];
NSString *monthName = [[df monthSymbols] objectAtIndex:(monthNumber-1)];
Note that you'll need to subtract 1 from your 1...
Favicon dimensions? [duplicate]
...upport possible. You upload an image and this site gives you the code, the converted images and a browserconfig file.
We could simply upload a favicon manually to our website of 16x16 and it will probably show up in almost any browser.
But when you will mark it as one of your favorites on your s...
c++ boost::multi_index composite keys efficiency - c++1y / stl - 清泛IT社区，为创新赋能！
...will take O(n=1) time, i.e. is the container sorted such that there is a pointer directly to each item, or does the boost container retrieve a list that matches the first part of the composite key and then need to perform a search for items matching the second part of the key and thus is slower?For ...
What is the real overhead of try/catch in C#?
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Three points to make here:
Firstly, there is little or NO performance penalty in actually having try-catch blocks in your code. This should not be a consideration when trying to avoid having them in your application. The performanc...
When should you not use virtual destructors?
...is no need to use a virtual destructor when any of the below is true:
No intention to derive classes from it
No instantiation on the heap
No intention to store in a pointer of a superclass
No specific reason to avoid it unless you are really so pressed for memory.
...
How do disable paging by swiping with finger in ViewPager but still be able to swipe programmaticall
...that you don't want to change like allowing child views to get touches. onInterceptTouchEvent is what you want to change. If you look at the code for ViewPager, you'll see the comment:
/*
* This method JUST determines whether we want to intercept the motion.
* If we return true, onM...