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Get last n lines of a file, similar to tail
... edited Feb 15 at 8:04
DARK_C0D3R
59455 silver badges1515 bronze badges
answered Sep 25 '08 at 21:43
S.Lott...
Are there any SHA-256 javascript implementations that are generally considered trustworthy?
... @Xenland All you're doing is creating a new password which is "token + password". All of the original problems still apply. For example, an attacker can replace the JavaScript with code to send them the token + password.
– Brendan Long
Nov 16 '16 at...
When would anyone use a union? Is it a remnant from the C-only days?
...te a heterogeneous collection of unrelated types which are not dynamically allocated (perhaps they are in-place constructed in a map, or members of an array).
And now, an example, with a UML class diagram:
The situation in plain English: an object of class A can have objects of any class among ...
What's the fastest way to read a text file line-by-line?
...n a 511 KB file), probably due to how String.Split is implemented. It also allocates an array for all the lines increasing the memory required compared to your solution.
using (var streamReader = File.OpenText(fileName)) {
var lines = streamReader.ReadToEnd().Split("\r\n".ToCharArray(), StringSpl...
Custom toast on Android: a simple example
...tch_parent"
android:layout_height="match_parent"
android:padding="10dp"
android:background="#DAAA" >
<ImageView android:id="@+id/image"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_marginRight="10dp" />
...
Send string to stdin
...73e 0ca6 bb3e D..>bN.>.|.>...>
00000b0: 6fcc bf3e 15ef c33e e90d c83e d728 cc3e o..>...>...>.(.>
00000c0: c93f d03e ac52 d43e 6c61 d83e f36b dc3e .?.>.R.>la.>.k.>
00000d0: 2f72 e03e 0a74 e43e 7171 e83e 506a ec3e /r.>.t.>qq.>Pj.>
00000e0: 945e f03e ...
SparseArray vs HashMap
...ypes, even though not all of them are publicly available.
Benefits are:
Allocation-free
No boxing
Drawbacks:
Generally slower, not indicated for large collections
They won't work in a non-Android project
HashMap can be replaced by the following:
SparseArray <Integer, Object>...
Performance - Date.now() vs Date.getTime()
...
Is this because Date(optional).getTime(); has to allocate space to get a new Date object before getting the current time?
– Charlie G
Sep 20 '12 at 17:07
...
Real differences between “java -server” and “java -client”?
...visible immediate difference in older versions of Java would be the memory allocated to a -client as opposed to a -server application. For instance, on my Linux system, I get:
$ java -XX:+PrintFlagsFinal -version 2>&1 | grep -i -E 'heapsize|permsize|version'
uintx AdaptivePermSizeWeight ...
Getting image dimensions without reading the entire file
..., 0x61 }, DecodeGif },
{ new byte[]{ 0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A }, DecodePng },
{ new byte[]{ 0xff, 0xd8 }, DecodeJfif },
};
/// <summary>
/// Gets the dimensions of an image.
/// </summary>
/// <para...