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Running multiple commands with xargs
...gs -d $'\n' sh -c 'for arg do command1 "$arg"; command2 "$arg"; ...; done' _
...or, without a Useless Use Of cat:
<a.txt xargs -d $'\n' sh -c 'for arg do command1 "$arg"; command2 "$arg"; ...; done' _
To explain some of the finer points:
The use of "$arg" instead of % (and the absence of...
How to correctly implement custom iterators and const_iterators?
...ustom container class for which I'd like to write the iterator and const_iterator classes.
6 Answers
...
Escape a string for a sed replace pattern
...es, forward slash for end of statement and & for replace all):
ESCAPED_REPLACE=$(printf '%s\n' "$REPLACE" | sed -e 's/[\/&]/\\&/g')
# Now you can use ESCAPED_REPLACE in the original sed statement
sed "s/KEYWORD/$ESCAPED_REPLACE/g"
If you ever need to escape the KEYWORD string, the fol...
Do Java arrays have a maximum size?
...ry easy to test.
In a recent HotSpot VM, the correct answer is Integer.MAX_VALUE - 5. Once you go beyond that:
public class Foo {
public static void main(String[] args) {
Object[] array = new Object[Integer.MAX_VALUE - 4];
}
}
You get:
Exception in thread "main" java.lang.OutOfMemoryEr...
Set focus on TextBox in WPF from view model
... force it to false and then true. public bool IsFocused { get { return _isFocused; } set { if (_isFocused == value) { _isFocused = false; OnPropertyChanged(); } _isFocused = value; OnPropertyChanged(); } }
...
How to find indices of all occurrences of one string in another in JavaScript?
...d) {
// or shorter arrow function:
// return source.split('').map((_,i) => i);
return source.split('').map(function(_, i) { return i; });
}
var result = [];
for (i = 0; i < source.length; ++i) {
// If you want to search case insensitive use
// if (source.substring(i,...
How to sign an android apk file
...
Did you read the manual? -alias <alias_name> An alias for the key. Only the first 8 characters of the alias are used. It's just an alias. A name, if you will. i'd suggest "firstkey" :-)
– Nanne
Jan 31 '11 at 16:29
...
PostgreSQL Autoincrement
...other integer data type, such as smallint.
Example :
CREATE SEQUENCE user_id_seq;
CREATE TABLE user (
user_id smallint NOT NULL DEFAULT nextval('user_id_seq')
);
ALTER SEQUENCE user_id_seq OWNED BY user.user_id;
Better to use your own data type, rather than user serial data type.
...
Multiple aggregations of the same column using pandas GroupBy.agg()
...
@sparc_spread Passing multiple functions as a list is well described in the pandas documentation. Renaming and passing multiple functions as a dictionary will be deprecated in a future version of pandas. Details are in the 0.20 cha...
jQuery/Javascript function to clear all the fields of a form [duplicate]
...
@DayronGallardo Might also want to add $(container_element).find(':checkbox, :radio').prop('checked', false);
– rybo111
Mar 16 '14 at 9:55
...