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How to use the toString method in Java?
...ed hexadecimal
representation of the hash code of the
object. In other words, this method
returns a string equal to the value
of:
getClass().getName() + '@' + Integer.toHexString(hashCode())
Example:
String[] mystr ={"a","b","c"};
System.out.println("mystr.toString: " + mystr.toString()...
Are PostgreSQL column names case-sensitive?
...
To quote the documentation:
Key words and unquoted identifiers are case insensitive. Therefore:
UPDATE MY_TABLE SET A = 5;
can equivalently be written as:
uPDaTE my_TabLE SeT a = 5;
You could also write it using quoted identifiers:
UPDATE "my_ta...
When should you use a class vs a struct in C++?
..., but people rarely declare structs just to save on typing the "public" keyword.
But the real difference in practice is between a class/struct that declares a constructor/destructor and one that doesn't. There are certain guarantees to a "plain-old-data" POD type, that no longer apply once you ta...
Read file line by line using ifstream in C++
...,000,000 lines and 10,000,000 lines of text. Each line of text contains 10 words in average. The program is compiled with -O3 optimization and its output is forwarded to /dev/null in order to remove the logging time variable from the measurement. Last, but not least, each piece of code logs each lin...
Function of Project > Clean in Eclipse
...selected the files you want to reload from the local file system--in other words, just clicking inside Package Explorer and pressing F5 won't do anything. After doing a refresh of a lot of files, I usually do a Project > Clean.
– hotshot309
Jul 27 '12 at 13...
hash function for string
...
First, is 40 collisions for 130 words hashed to 0..99 bad? You can't expect perfect hashing if you are not taking steps specifically for it to happen. An ordinary hash function won't have fewer collisions than a random generator most of the time.
A hash fu...
Are there any cases when it's preferable to use a plain old Thread object instead of one of the newe
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You could replace the word "thread" with "unmanaged code" in the second paragraph and it will still ring true
– Conrad Frix
Mar 27 '12 at 17:57
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How do you organise multiple git repositories, so that all of them are backed up together?
...common directory tree for ease of backuping and administration. (In other words, Git/Hg/Bzr force you to separate administration from project tasks, while most SVN workflows conflate the two; it's now common to see people delegate the administrative part to GitHub or other such providers.)
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Convert int to ASCII and back in Python
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chr words in the range of the ascii characters (0 - 255), however, unichr works for the unicode character set.
– Shivendra Soni
Aug 15 '18 at 19:41
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Type definition in object literal in TypeScript
...instance of that class. I.e. we need to create the class with the 'new' keyword. And we're then back to square 1, since we can't do something like new class() {prop: 1}; in TS like we can in C#, for example.
– DeuxAlpha
Mar 14 '19 at 18:34
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