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How to get execution time in rails console?
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edited Jul 20 '19 at 4:28
Jeremy Baker
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Regular expression: find spaces (tabs/space) but not newlines
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answered Aug 27 '10 at 10:03
LekensteynLekensteyn
55k2020 gold badges143143 silver badges176176 bronze badges
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How to move columns in a MySQL table?
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If empName is a VARCHAR(50) column:
ALTER TABLE Employees MODIFY COLUMN empName VARCHAR(50) AFTER department;
EDIT
Per the comments, you can also do this:
ALTER TABLE Employees CHANGE COLUMN empName empName VARCHAR(50) AFTER department;
Note t...
Append to a file in Go
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f, err := os.OpenFile(filename, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)
if err != nil {
panic(err)
}
defer f.Close()
if _, err = f.WriteString(text); err != nil {
panic(err)
}
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MongoDB: How to query for records where field is null or not set?
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edited Aug 31 '16 at 0:31
answered May 14 '12 at 21:55
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How to define @Value as optional
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answered Jul 8 '16 at 16:05
Andy BrownAndy Brown
7,73022 gold badges2828 silver badges4242 bronze badges
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How do I install package.json dependencies in the current directory using npm
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403
Running:
npm install
from inside your app directory (i.e. where package.json is located) wil...
Loop through an array php
...epath'];
// $array[$i] is same as $item
}
Using for loop
for ($i = 0; $i < count($array); $i++) {
echo $array[$i]['filename'];
echo $array[$i]['filepath'];
}
var_dump is a really useful function to get a snapshot of an array or object.
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Suppress command line output
...dout is file descriptor 1, and stderr is file descriptor 2 by convention. (0 is stdin, incidentally.) The 2>&1 copies output file descriptor 2 from the new value of 1, which was just redirected to the null device.
This syntax is (loosely) borrowed from many Unix shells, but you do have to be...
Does order of where clauses matter in SQL?
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102
No, that order doesn't matter (or at least: shouldn't matter).
Any decent query optimizer will...