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Explain the use of a bit vector for determining if all characters are unique
...d plus it can store more flags.
For future reference: bit vector is also known as bitSet or bitArray. Here are some links to this data structure for different languages/platforms:
CPP: BitSet
Java: BitSet
C#: BitVector32 and BitArray
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What's the difference between JPA and Hibernate? [closed]
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This metaphor does not add understanding. If you already know the difference, you'll find it amuzing. If you don't know the difference, you will still not know it.
– Nick Volynkin
Feb 15 '17 at 10:18
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How do I make JavaScript beep?
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Solution
You can now use base64 files to produce sounds when imported as data URI. The solution is almost the same as the previous ones, except you do not need to import an external audio file.
function beep() {
var snd = new Audio("data...
Why does Javascript getYear() return 108?
...the years since 1900 are counted.
There are potential compatibility issues now that getYear() has been deprecated in favour of getFullYear() - from quirksmode:
To make the matter even more complex, date.getYear() is deprecated nowadays and you should use date.getFullYear(), which, in turn, is not s...
Fixed position but relative to container
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Short answer: no. (It is now possible with CSS transform. See the edit below)
Long answer: The problem with using "fixed" positioning is that it takes the element out of flow. thus it can't be re-positioned relative to its parent because it's as if ...
vertical-align with Bootstrap 3
...ly recommend you to use flexbox (as stated in @Haschem answer), since it's now supported everywhere.
Demos link:
- Bootstrap 3
- Bootstrap 4 alpha 6
You still can use a custom class when you need it:
.vcenter {
display: inline-block;
vertical-align: middle;
float:...
What is std::string::c_str() lifetime?
...use the strings are not modified while in that scope. (However, we don't know what use_foo() or ~Foo() might be doing with those values; if they copy the strings elsewhere, then they should do a true copy, and not just copy the char pointers.)
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Eclipse error “ADB server didn't ACK, failed to start daemon”
...sk manager, which has adb.exe process and end (kill) that process
Step 2:
Now, close the eclipse, which is currently running on my computer.
Step 3:
Again, restart eclipse then solved that problem.
For those using OS X
killall adb
For those using Windows
adb kill-server
should do the tric...
Learning Ruby on Rails
As it stands now, I'm a Java and C# developer. The more and more I look at Ruby on Rails, the more I really want to learn it.
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MySQL: multiple tables or one table with many columns?
...r if I separate the tables in this manner to improve the performance? I'll now go read about the wiki that you mentioned :)
– Xavier_Ex
Mar 19 '12 at 17:45
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