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If strings are immutable in .NET, then why does Substring take O(n) time?
...(n) is O(1) if n does not grow large. Most people extract tiny substrings from tiny strings, so how the complexity grows asymptotically is completely irrelevant.
The long answer is:
An immutable data structure built such that operations on an instance permit re-use of the memory of the original w...
Is there a way to crack the password on an Excel VBA Project?
...ow the hell can I make my VBA project protected stronger to prevent others from using this hack on it :)
– EranG
Jan 25 '16 at 12:01
6
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Are negative array indexes allowed in C?
...
That is correct. From C99 §6.5.2.1/2:
The definition of the subscript
operator [] is that E1[E2] is
identical to (*((E1)+(E2))).
There's no magic. It's a 1-1 equivalence. As always when dereferencing a pointer (*), you need to b...
What is the difference between indexOf() and search()?
...rgument
str.indexOf('k') // 3
str.indexOf('k',4) // 11 (it start search from 4th position)
special in search()
search value can be regular expression
str.search('book') // 8
str.search(/book/i) // 0 ( /i =case-insensitive (Book == book)
reference
...
How to capture no file for fs.readFileSync()?
...y, fs.readFileSync throws an error when a file is not found. This error is from the Error prototype and thrown using throw, hence the only way to catch is with a try / catch block:
var fileContents;
try {
fileContents = fs.readFileSync('foo.bar');
} catch (err) {
// Here you get the error when ...
How do you create nested dict in Python?
...t;> d
{'dict1': {'innerkey': 'value'}}
You can also use a defaultdict from the collections package to facilitate creating nested dictionaries.
>>> import collections
>>> d = collections.defaultdict(dict)
>>> d['dict1']['innerkey'] = 'value'
>>> d # currentl...
Commit history on remote repository
...emote branch in that repository, but only the logs that you have "fetched" from their repository to your personal "copy" of the remote repository.
Remember that your clone of the repository will update its state of any remote branches only by doing git fetch. You can't connect directly to the serve...
Integer.toString(int i) vs String.valueOf(int i)
...cal thing, but it is more useful for a developer to use the method valueOf from the String class than from the proper type, as it leads to fewer changes for us to make.
Sample 1:
public String doStuff(int num) {
// Do something with num...
return String.valueOf(num);
}
Sample2:
public ...
How do I load a file from resource folder?
... great, I'm so stupid that I was using Object.class.getClassLoader();, from a static context which didn't work - this suggestion does - well almost, it injects %20 for spaces which gives me a FileNotFoundException
– ycomp
Mar 7 '16 at 20:03
...
ERROR 1396 (HY000): Operation CREATE USER failed for 'jack'@'localhost'
... a bug. It is a documentation conspiracy - docs vary in one critical place from version to version.
13.7.1.2. DROP USER Syntax
...
DROP USER user [, user] ...
...
DROP USER 'jeffrey'@'localhost';
If you specify only the user name part of the account name, a host name part of '%' is use...