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Why does Java's hashCode() in String use 31 as a multiplier?
...any kind of international charset with common characters outside the ASCII range. At least, I checked this for 31 and German. So I think the choice of 31 is broken.
– Hans-Peter Störr
May 11 '10 at 6:58
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Using Git, show all commits that are in one branch, but not the other(s)
...tration https://git-scm.com/book/en/v2/Git-Tools-Revision-Selection#Commit-Ranges
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Why should I prefer to use member initialization lists?
...uch difference the member initialization list can mak. In the leetcode 303 Range Sum Query - Immutable, https://leetcode.com/problems/range-sum-query-immutable/, where you need to construct and initialize to zero a vector with certain size. Here is two different implementation and speed comparison.
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How do you set a default value for a MySQL Datetime column?
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it's important to note that datetime has a range of 1000-9999, but the range for timestamp is only 1970-2038. this can be a problem if your system has to store birthdates, or you have to handle something like the payment plan for a 30-year mortgage. dev.mysql.com/doc/...
How does one generate a random number in Apple's Swift language?
... when using the float functions, how can I include the upper value in the range of possibilities? So lets say I do 0.0 as the lower and 1.0 as the upper. With this logic it will give me 0.0 up to 0.99999999. But instead I'd like to include the 1.0 as a possibility. How can I achieve this?
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How does Java handle integer underflows and overflows and how would you check for it?
...type to actually perform the operation and check if the result is still in range for the source type:
public int addWithOverflowCheck(int a, int b) {
// the cast of a is required, to make the + work with long precision,
// if we just added (a + b) the addition would use int precision and
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\d is less efficient than [0-9]
...ather than [0-9] or \d . I said it was probably more efficient to use a range or digit specifier than a character set.
5...
Remove characters from NSString?
...ring:@""
options:0
range:NSMakeRange(0, string.length)];
this is also useful if you would like the result to be a mutable instance of an input string:
NSMutableString * string = [concreteString mutableCopy];
[string replaceOccurrencesOfStrin...
What is the optimal length for an email address in a database?
...de: 24 Std. Dev (w/
outliers): 5.20 Std. Dev (w/o
outliers): 4.70
Ranges based on data including
outliers
68.2% of data 17.8 - 28.2
95.4% of data 12.6 - 33.4
99.7% of data 7.4 - 38.6
Ranges based on data outliers excluded
68.2% of data 18.1 - 27.5
95.4% of data 13.4 - 32.2
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Is Redis just a cache?
...ender your homepage, you ask Redis for the most recent 25 questions.
$ lrange questions 0 24
1) "question:100"
2) "question:99"
3) "question:98"
4) "question:97"
5) "question:96"
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25) "question:76"
Now that you have the ids, retrieve items from Redis using pipelining and show them to the use...