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What does mysql error 1025 (HY000): Error on rename of './foo' (errorno: 150) mean?
...fferent character set of a table, because of a mysql error: ERROR 1025 (HY000): Error on rename of './table/#sql-14ae_81' to (errno: 150)
– letsjump
Feb 3 '17 at 8:52
...
How to list variables declared in script in bash?
...puriously make it into the output.
+ function a() { echo $'\nA2=B'; }; A0=000; A9=999;
+ SOLUTION | grep '^A[0-9]='
A0=000
A9=999
AND: The "DejayClayton" problem is solved (embedded newlines in variable values do not disrupt the output - each VAR=VALUE get a single output line):
+ A1=$'111\nA2=...
How can I output leading zeros in Ruby?
... see the documentation on this now (ruby-doc.org/core/classes/String.html#M000770), but it's very concise and I'd like a little elaboration.
– Nathan Long
Oct 9 '09 at 11:29
1
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Casting vs using the 'as' keyword in the CLR
...System.Diagnostics;
using System.Linq;
class Test
{
const int Size = 30000000;
static void Main()
{
object[] values = new object[Size];
for (int i = 0; i < Size - 2; i += 3)
{
values[i] = null;
values[i + 1] = "x";
values[i...
Can I use assert on Android devices?
...is generated is (for Android 2.3.3):
// Static constructor for the class
000318: |[000318] com.example.asserttest.AssertActivity.:()V
000328: 1c00 0300 |0000: const-class v0, Lcom/example/asserttest/AssertActivity; // class@0003
0...
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock'
I installed MySQL on Mac OS X Mountain Lion with homebrew install mysql , but when I tried mysql -u root I got the following error:
...
Converting Long to Date in Java returns 1970
I have list with long values (for example: 1220227200, 1220832000, 1221436800...) which I downloaded from web service. I must convert it to Dates. Unfortunately this way, for example:
...
Deleting DataFrame row in Pandas based on column value
...race rating raw wrating
0 2007-03-31 62 11 56 1.000 56.000
1 2007-03-10 83 11 67 1.000 67.000
2 2007-02-10 111 9 66 1.000 66.000
3 2007-01-13 139 10 83 0.881 73.096
4 2006-12-23 160 10 ...
What is the easiest way to remove the first character from a string?
...fastest and most readable way of doing things:
require 'benchmark'
N = 1_000_000
puts RUBY_VERSION
STR = "[12,23,987,43"
Benchmark.bm(7) do |b|
b.report('[0]') { N.times { "[12,23,987,43"[0] = '' } }
b.report('sub') { N.times { "[12,23,987,43".sub(/^\[+/, "") } }
b.report('gsub') { N.tim...
Add spaces before Capital Letters
...(text[i]);
}
return newText.ToString();
}
Will do it 100,000 times in 2,968,750 ticks, the regex will take 25,000,000 ticks (and thats with the regex compiled).
It's better, for a given value of better (i.e. faster) however it's more code to maintain. "Better" is often compromise ...