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Insert a line at specific line number with sed or awk
I have a script file which I need to modify with another script to insert a text at the 8th line.
9 Answers
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serve current directory from command line
...eeted it out today you can do:
ruby -run -e httpd . -p 5000
And you can set the bind address as well by adding -b 127.0.0.1
Works with Ruby 1.9.2 and greater.
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Reverting part of a commit with git
...n $bad_commit # Revert the commit, but don't commit the changes
$ git reset HEAD . # Unstage the changes
$ git add --patch . # Add whatever changes you want
$ git commit # Commit those changes
Note: The files you add using git add --patch are the files y...
Programmer Puzzle: Encoding a chess board state throughout a game
.... Chess occurs on an 8x8 board with each player starting with an identical set of 16 pieces consisting of 8 pawns, 2 rooks, 2 knights, 2 bishops, 1 queen and 1 king as illustrated here:
Positions are generally recorded as a letter for the column followed by the number for the row so White’s que...
File Upload using AngularJS
...
<input data-my-Directive type="file" name="file">
PHP:
if (isset($_FILES['file']) && $_FILES['file']['error'] == 0) {
// uploads image in the folder images
$temp = explode(".", $_FILES["file"]["name"]);
$newfilename = substr(md5(time()), 0, 10) . '.' . end($temp);
...
HashSet vs. List performance
It's clear that a search performance of the generic HashSet<T> class is higher than of the generic List<T> class. Just compare the hash-based key with the linear approach in the List<T> class.
...
QuotaExceededError: Dom exception 22: An attempt was made to add something to storage that exceeded
...rror in Safari Private Browser Mode on both iOS and OS X when localStorage.setItem (or sessionStorage.setItem) is called.
One solution is to do a try/catch or Modernizr check in each instance of using setItem.
However if you want a shim that simply globally stops this error being thrown, to preven...
Precise Financial Calculation in JavaScript. What Are the Gotchas?
...mal representation errors can be avoided by scaling1.
Note that while the set of real numbers is infinite, only a finite number of them (18,437,736,874,454,810,627 to be exact) can be represented exactly by the JavaScript floating-point format. Therefore the representation of the other numbers will...
Prevent row names to be written to file when using write.csv
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How do I sort an observable collection?
...ble<Person>
{
public string Name { get; set; }
public int Age { get; set; }
public int CompareTo(Person other)
{
if (this.Age == other.Age) return 0;
return this.Age.Compar...