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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...
Numpy first occurrence of value greater than existing value
... argmax, where,
nonzero,
searchsorted
],
n_range=[2**k for k in range(2, 20)],
logx=True,
logy=True,
xlabel='len(array)'
)
share
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improve this answ...
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...
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 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
...
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.
...
Does JavaScript have “Short-circuit” evaluation?
...'s not exactly how the code is evaluated and we'll need to delve deeper in order to fully understand.
How exactly is the && and || interpreted?:
It's time to look "under the hood of the javascript engine". Let's consider this practical example:
function sanitise(x) {
if (isNaN(x)...
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 can I get a web site's favicon?
... looks like Google has a similar service now: google.com/s2/favicons?domain_url=stackoverflow.com
– hunter
May 8 '15 at 19:49
20
...
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
...