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Curly braces in string in PHP
...echo "This is ${great}";
// Works
echo "This square is {$square->width}00 centimeters broad.";
// Works, quoted keys only work using the curly brace syntax
echo "This works: {$arr['key']}";
// Works
echo "This works: {$arr[4][3]}";
// This is wrong for the same reason as $foo[bar] is wrong...
How to replace a character with a newline in Emacs?
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answered Mar 4 '09 at 23:52
Jonathan ArkellJonathan Arkell
9,45522 gold badges2222 silver badges3232 bronze badges
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Calculate distance between 2 GPS coordinates
...d South locations are negative.
Remember minutes and seconds are out of 60 so S31 30' is -31.50 degrees.
Don't forget to convert degrees to radians. Many languages have this function. Or its a simple calculation: radians = degrees * PI / 180.
function degreesToRadians(degrees) {
return degre...
How would you make two s overlap?
...
90
I might approach it like so (CSS and HTML):
html,
body {
margin: 0px;
}
#logo {
p...
What is the difference between LL and LR parsing?
...
490
At a high level, the difference between LL parsing and LR parsing is that LL parsers begin at th...
PatternSyntaxException: Illegal Repetition when using regex in Java
...message: "Illegal repetition".
You should escape them: "\\{\"user_id\" : [0-9]*\\}".
And since you seem to be trying to parse JSON, I suggest you have a look at Jackson.
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How to do a batch insert in MySQL
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304
From the MySQL manual
INSERT statements that use VALUES
syntax can insert multiple rows. ...
How to assign an exec result to a sql variable?
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100
I always use the return value to pass back error status. If you need to pass back one value I'...
range over interface{} which stores a slice
...
case reflect.Slice:
s := reflect.ValueOf(t)
for i := 0; i < s.Len(); i++ {
fmt.Println(s.Index(i))
}
}
}
Go Playground Example: http://play.golang.org/p/gQhCTiwPAq
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Split comma-separated strings in a column into separate rows
...ckage (see code below).
The sample data given by the OP consists only of 20 rows. To create larger data frames, these 20 rows are simply repeated 1, 10, 100, 1000, 10000, and 100000 times which give problem sizes of up to 2 million rows.
Benchmark results
The benchmark results show that for su...