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1500 questions
3712
votes
18 answers
Why is char[] preferred over String for passwords?
In Swing, the password field has a getPassword() (returns char[]) method instead of the usual getText() (returns String) method. Similarly, I have come across a suggestion not to use String to handle passwords.
Why does String pose a threat to…
Ahamed
- 38,027
- 13
- 37
- 68
3705
votes
42 answers
What are the differences between a pointer variable and a reference variable in C++?
I know references are syntactic sugar, so code is easier to read and write.
But what is the difference between a pointer variable and a reference variable?
prakash
- 57,297
- 25
- 89
- 114
3679
votes
32 answers
3674
votes
55 answers
Sort array of objects by string property value
I have an array of JavaScript objects:
var objs = [
{ first_nom: 'Lazslo', last_nom: 'Jamf' },
{ first_nom: 'Pig', last_nom: 'Bodine' },
{ first_nom: 'Pirate', last_nom: 'Prentice' }
];
How can I sort them by the value of…
Tyrone Slothrop
- 37,031
- 3
- 15
- 8
3667
votes
24 answers
Using global variables in a function
How can I create or use a global variable in a function?
If I create a global variable in one function, how can I use that global variable in another function? Do I need to store the global variable in a local variable of the function which needs…
user46646
- 144,445
- 43
- 74
- 84
3664
votes
7 answers
Iterate through a HashMap
What's the best way to iterate over the items in a HashMap?
burntsugar
- 55,934
- 21
- 53
- 80
3651
votes
87 answers
How to round to at most 2 decimal places, if necessary
I'd like to round at most two decimal places, but only if necessary.
Input:
10
1.7777777
9.1
Output:
10
1.78
9.1
How can I do this in JavaScript?
stinkycheeseman
- 39,309
- 7
- 28
- 49
3644
votes
7 answers
How do I clone a specific Git branch?
Git clone will clone remote branch into local.
Is there any way to clone a specific branch by myself without switching branches on the remote repository?
Scud
- 38,933
- 7
- 24
- 18
3640
votes
123 answers
Message 'src refspec master does not match any' when pushing commits in Git
I clone my repository with:
git clone ssh://xxxxx/xx.git
But after I change some files and add and commit them, I want to push them to the server:
git add xxx.php
git commit -m "TEST"
git push origin master
But the error I get back is:
error: src…
sinoohe
- 36,756
- 3
- 17
- 16
3623
votes
32 answers
Is floating point math broken?
Consider the following code:
0.1 + 0.2 == 0.3 -> false
0.1 + 0.2 -> 0.30000000000000004
Why do these inaccuracies happen?
Cato Johnston
- 41,471
- 10
- 38
- 42
3619
votes
11 answers
Move existing, uncommitted work to a new branch in Git
I started some work on a new feature and after coding for a bit, I decided this feature should be on its own branch.
How do I move the existing uncommitted changes to a new branch and reset my current one?
I want to reset my current branch while…
Dane O'Connor
- 71,622
- 37
- 116
- 167
3603
votes
51 answers
How can I check for an empty/undefined/null string in JavaScript?
I saw this question, but I didn't see a JavaScript specific example. Is there a simple string.Empty available in JavaScript, or is it just a case of checking for ""?
casademora
- 64,193
- 16
- 68
- 78
3590
votes
10 answers
Does Python have a string 'contains' substring method?
I'm looking for a string.contains or string.indexof method in Python.
I want to do:
if not somestring.contains("blah"):
continue
Blankman
- 248,432
- 309
- 736
- 1,161
3585
votes
60 answers
How can I create a memory leak in Java?
I just had an interview where I was asked to create a memory leak with Java.
Needless to say, I felt pretty dumb having no clue on how to even start creating one.
What would an example be?
MatBanik
- 25,486
- 39
- 112
- 177
