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grep a file, but show several surrounding lines?
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Ok, but what if want to show all lines of output after the match? grep -A0 and grep -A-1 don't cut it...
– g33kz0r
Jul 22 '11 at 2:18
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Random date in C#
...tart.AddDays(gen.Next(range));
}
For better performance if this will be called repeatedly, create the start and gen (and maybe even range) variables outside of the function.
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What does ':' (colon) do in JavaScript?
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var o = {
r: 'some value',
t: 'some other value'
};
is functionally equivalent to
var o = new Object();
o.r = 'some value';
o.t = 'some other value';
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Convert InputStream to byte array in Java
...a byte[].
InputStream is;
byte[] bytes = IOUtils.toByteArray(is);
Internally this creates a ByteArrayOutputStream and copies the bytes to the output, then calls toByteArray(). It handles large files by copying the bytes in blocks of 4KiB.
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Getting name of the class from an instance
... Remember to #import <objc/objc-runtime.h> to able to call class on an instance.
– JP Illanes
Mar 11 '15 at 8:04
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Multiline TextView in Android?
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If the text you're putting in the TextView is short, it will not automatically expand to four lines. If you want the TextView to always have four lines regardless of the length of the text in it, set the android:lines attribute:
<TextView
android:id="@+id/address1"
android:gravity="left...
Git for Windows: .bashrc or equivalent configuration files for Git Bash shell
I've just installed Git for Windows and am delighted to see that it installs Bash.
12 Answers
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How to update a value, given a key in a hashmap?
...e computeIfPresent method and supply it a mapping function, which will be called to compute a new value based on existing one.
For example,
Map<String, Integer> words = new HashMap<>();
words.put("hello", 3);
words.put("world", 4);
words.computeIfPresent("hello", (k, v) -> v + 1);
S...
Socket File “/var/pgsql_socket/.s.PGSQL.5432” Missing In Mountain Lion (OS X Server)
...ing the same problem with PostgreSQL that I did last year when I first installed Lion Server.
20 Answers
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How to check if one of the following items is in a list?
...ts only contain one of each item). If `L1 = [1,1,2,3]' and 'L2 = [1,2,3]', all items will be seen to intersect.
– ron_g
Sep 21 '18 at 8:48
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