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Which is more efficient, a for-each loop, or an iterator?
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If you are just wandering over the collection to read all of the values, then there is no difference between using an iterator or the new for loop syntax, as the new syntax just uses the iterator underwater.
If however, you mean by loop the old "c-style" loop:
for(int i=0...
How can I recover a removed file in Mercurial (if at all)?
...ath to deleted file>
The deleted file will now be in your working copy, ready to be committed back into head.
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How to capitalize the first letter of a String in Java?
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public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
// Actually use the Reader
String name = br.readLine();
// Don't mistake String object with a Character object
String s1 = name.substring(0, 1)...
Can I have multiple primary keys in a single table?
...width of our non-clustered leaf nodes, increasing storage requirements and read accesses for seeks and scans of that non-clustered index; and (2) reduces fan-out from our clustered index increasing index height and index size, again increasing reads and storage requirements for our clustered indexes...
How to avoid circular imports in Python? [duplicate]
...sue of circular imports in python has come up many times before and I have read these discussions. The comment that is made repeatedly in these discussions is that a circular import is a sign of a bad design and the code should be reorganised to avoid the circular import.
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Real World Example of the Strategy Pattern
I've been reading about the OCP principal and how to use the strategy pattern to accomplish this.
17 Answers
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Detect if value is number in MySQL
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@Richard- I just read the exceptions you gave. Thought you meant the character "e". I see what you mean now.
– Urbycoz
Feb 21 '11 at 12:53
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What's the difference between [ and [[ in Bash? [duplicate]
... will always appreciate clear code! Which script fragment would you rather read? Even out of context, the first choice is easier to read and understand.
if [[ -d $newDir && -n $(echo $newDir | grep "^${webRootParent}") && -n $(echo $newDir | grep '/$') ]]; then ...
or
if [ -d "...
echo that outputs to stderr
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You could do this, which facilitates reading:
>&2 echo "error"
>&2 copies file descriptor #2 to file descriptor #1. Therefore, after this redirection is performed, both file descriptors will refer to the same file: the one file descriptor #2 was...
SVN checkout ignore folder
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From reading that, it looks like sparse checkouts only limit the depth of a checkout. They can't ignore one particular folder.
– John Millikin
Oct 10 '08 at 20:04
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