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sed edit file in place
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@PetrPeller: Really? If you read the question carefully, you would understand that the OP is trying to avoid something like, sed 's/foo/bar/g' file.txt > file.tmp && mv file.tmp file.txt. Just because in-place editing does the rename using a ...
What is ActiveMQ used for - can we apply messaging concept using a Database?
...ctiveMQ. For example, applications A and B could create qeues A.B and B.A (read: messages for A from B and the other way round) and send messages for each other to the matching queue.
– Alex
Nov 10 '16 at 13:08
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Odd behavior when Java converts int to byte?
...int (32 bits) you simply copy the 1 to the left 24 times.
Now, one way to read a negative two's complement number is to start with the least significant bit, move left until you find the first 1, then invert every bit afterwards. The resulting number is the positive version of that number
For exam...
What is the 'new' keyword in JavaScript?
... to Function.prototype, numbers to Number.prototype, etc.). It can only be read with Object.getPrototypeOf(someObject). There is no other way to set or read this value.
Functions, in addition to the hidden [[prototype]] property, also have a property called prototype, and it is this that you can ac...
Get specific object by id from array of objects in AngularJS
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... I really hope after reading this answer people don't think it's a good idea to sort an array then do a binary search. Binary search is clever, sure, but only if the array is already sorted, and in reality is: 1. easy to poorly implement, 2. Hard...
What does FETCH_HEAD in Git mean?
...Consider also, still with Git 2.29 (Q4 2020), the FETCH_HEAD is now always read from the filesystem regardless of the ref backend in use, as its format is much richer than the normal refs, and written directly by "git fetch"(man) as a plain file..
See commit e811530, commit 5085aef, commit 4877c6c, ...
What do I have to do to get Core Data to automatically migrate models?
I have read the documentation about automatic /lightweight migration for Core Data models - but I am having problems implementing it.
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Convert a Unicode string to a string in Python (containing extra symbols)
...This raw string of bytes can be written to a file. However, note that when reading it back, you must know what encoding it is in and decode it using that same encoding.
When writing to files, you can get rid of this manual encode/decode process by using the codecs module. So, to open a file that en...
How to send a JSON object over Request with Android?
...TP Client. Here's a code sample on how to do it. You should create a new thread for network activities so as not to lock up the UI thread.
protected void sendJson(final String email, final String pwd) {
Thread t = new Thread() {
public void run() {
Looper.pr...
Unix tail equivalent command in Windows Powershell
..., not tail -f and an efficient implementation as well. Since this one also reads the complete file before returning the last lines this is painful for the file sizes they expect.
– Joey
Dec 13 '10 at 9:26
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