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Grep only the first match and stop
..., --text, process a binary file as if it were text
-m 1, --max-count, stop reading a file after 1 matching line
-h, --no-filename, suppress the prefixing of file names on output
-r, --recursive, read all files under a directory recursively
...
Creating a constant Dictionary in C#
...
If using 4.5+ Framework I would use ReadOnlyDictionary (also ReadOnly Collection for lists) to do readonly mappings/constants. It's implemented in the following way.
static class SomeClass
{
static readonly ReadOnlyDictionary<string,int> SOME_MAPPING...
Change R default library path using .libPaths in Rprofile.site fails to work
... if you want to add a library why not append the new library (which must already exist in your filesystem) to the existing library path?
.libPaths( c( .libPaths(), "~/userLibrary") )
Or (and this will make the userLibrary the first place to put new packages):
.libPaths( c( "~/userLibrary" , .li...
What are “sugar”, “desugar” terms in context of Java 8?
...ditions, mostly shortcuts, that make some constructs easier to type and to read (the latter being, in practice, the most important during the life cycle of your program).
Wikipedia has a definition of syntactic sugar but you should note that not all sugar is, in essence, syntactical (not all recent...
Download a file with Android, and showing the progress in a ProgressDialog
...red inside the activity class.
// that way, you can easily modify the UI thread from here
private class DownloadTask extends AsyncTask<String, Integer, String> {
private Context context;
private PowerManager.WakeLock mWakeLock;
public DownloadTask(Context context) {
this....
How to hide elements without having them take space on the page?
...ts not possible to remove element from dom man. by using this option also. read the question
– Pranay Rana
May 28 '10 at 11:58
26
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List all svn:externals recursively?
...ion for $wcdir"
echo "$1: $wcver"
svn propget svn:externals -R | while read a b c d e; do
[ -n "$a" ] || continue
if [ "$b" = "-" ]; then
wcparent="$a"
wcdir="$wcparent/$c"
[ -z "$e" ] || panic "Invalid format #1"
else
[ -n "$wcparent" ] || panic "Invalid form...
How to check if a query string value is present via JavaScript?
..., but your code is really sloppy. Where are you curly braces? You should read "The Good Parts" where code written a style without curly braces has been proven to fail under certain conditions and produces confusion during maintenance.
– austin cheney
Aug 22 '...
Difference between pre-increment and post-increment in a loop?
...i++); // Prints 0
int j = 0;
Console.WriteLine(++j); // Prints 1
i++ reads the value of i then increments it.
++i increments the value of i then reads it.
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What are the effects of exceptions on performance in Java?
...jmp. That means all registers of the CPU are written to the stack (which already takes some time) and possibly some other data needs to be created... all this already happens in the try statement. The throw statement needs to unwind the stack and restore the values of all registers (and possible oth...