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Code Golf: Lasers
...ation in the main loop, we update $d if the beam is currently on a mirror. XOR'ing by 3 gives the correct behavior for a \ mirror and XOR'ing by 1 gives the correct behavior for a / mirror.
$d^=3*/\\/+m</>
Next, the current position $r is updated accoring to the current direction.
$r+=(1,-...
What is the best way to use a HashMap in C++?
...al hash values for first,
// second and third and combine them using XOR
// and bit shifting:
return ((hash<string>()(k.first)
^ (hash<string>()(k.second) << 1)) >> 1)
^ (hash<int>()(k.third) << 1);
}
};
}
...
Search all tables, all columns for a specific value SQL Server [duplicate]
... @TableName nvarchar(256), @ColumnName nvarchar(128), @SearchStr2 nvarchar(110)
SET @TableName = ''
SET @SearchStr2 = QUOTENAME('%' + @SearchStr + '%','''')
WHILE @TableName IS NOT NULL
BEGIN
SET @ColumnName = ''
SET @TableName =
(
SELECT MIN(QUOTENAME(TABLE_SCHEMA) + '....
Search for one value in any column of any table inside a database
... @TableName nvarchar(256), @ColumnName nvarchar(128), @SearchStr2 nvarchar(110)
SET @TableName = ''
SET @SearchStr2 = QUOTENAME('%' + @SearchStr + '%','''')
WHILE @TableName IS NOT NULL
BEGIN
SET @ColumnName = ''
SET @TableName =
(
SELECT MIN(QUOTENAME(TABLE_SCHEMA) + '.' + QU...
Select first 4 rows of a data.frame in R
... no male no
12 6.100 13 59.4 no male no
13 6.110 14 59.5 no male no
14 6.120 15 59.6 no male no
15 6.130 16 59.7 no male no
Let's say, you want to select the first 10 rows. The easiest way to do it would be data[1:10, ]...
Why does X[Y] join of data.tables not allow a full outer join, or a left join?
...and Y rows where there is no match to the other table, ie an exclusive-or (XOR)
"cross" -- cross join or Cartesian product with each row of X matched to each row of Y
The default value is join="all.y" which corresponds to the present default.
The "all", "all.x" and "all.y" string values correspo...
Facebook API - How do I get a Facebook user's profile image through the Facebook API (without requir
... example,
https://graph.facebook.com/redbull/picture?width=140&height=110
returns
{
"data": {
"url": "https://fbcdn-profile-a.akamaihd.net/hprofile-ak-ash4/c0.19.180.142/s148x148/2624_134501175351_4831452_a.jpg",
"width": 148,
"height": 117,
"is_silh...
How can I find the data structure that represents mine layout of Minesweeper in memory?
...
.text:01003687 push edi
.text:01003688 xor edi, edi
.text:0100368A cmp eax, dword_1005334
.text:01003690 mov dword_1005164, edi
.text:01003696 jnz short loc_10036A4
.text:01003696
.text:01003698 ...
Differences in boolean operators: & vs && and | vs ||
...
Those are the bitwise AND and bitwise OR operators.
int a = 6; // 110
int b = 4; // 100
// Bitwise AND
int c = a & b;
// 110
// & 100
// -----
// 100
// Bitwise OR
int d = a | b;
// 110
// | 100
// -----
// 110
System.out.println(c); // 4
System.out.println(d); // 6...
“The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine” Error in importing
... Import Export Data (64 bit) tool. ("C:\Program Files\Microsoft SQL Server\110\DTS\Binn\DTSWizard.exe") notice the path is not Program Files x86.
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