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decompiling DEX into Java sourcecode
...files
jd-gui to view the java files in the jar
The source code is quite readable as dex2jar makes some optimizations.
Procedure:
And here's the procedure on how to decompile:
Step 1:
Convert classes.dex in test_apk-debug.apk to test_apk-debug_dex2jar.jar
d2j-dex2jar.sh -f -o output_jar.jar apk_to...
how to listen to N channels? (dynamic select statement)
...h approaches presented so far given the same input, a slice of channels to read from and a function to call for each value which also need to know which channel the value came from.
There are three main differences between the approaches:
Complexity. Although it may partially be a reader preferen...
ALTER TABLE without locking the table?
When doing an ALTER TABLE statement in MySQL, the whole table is read-locked (allowing concurrent reads, but prohibiting concurrent writes) for the duration of the statement. If it's a big table, INSERT or UPDATE statements could be blocked for a looooong time. Is there a way to do a "hot alter", li...
Seeing the console's output in Visual Studio 2010?
...ink for abit more info social.msdn.microsoft.com/Forums/en/csharpgeneral/thread/…
– Richard Adnams
Mar 14 '11 at 16:22
...
How can I read a function's signature including default argument values?
Given a function object, how can I get its signature? For example, for:
8 Answers
8
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COUNT DISTINCT with CONDITIONS
... be included in count.
One thing to note here is that this can be done by reading the table once. When it seems that you have to read the same table twice or more, it can actually be done by reading once, in most of the time. As a result, it will finish the task a lot faster with less I/O.
...
Using AES encryption in C#
...Stream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (StreamReader srDecrypt = new StreamReader(csDecrypt))
{
// Read the decrypted bytes from the decrypting stream
...
What's the difference between ConcurrentHashMap and Collections.synchronizedMap(Map)?
I have a Map which is to be modified by several threads concurrently.
19 Answers
19
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How do I remove/delete a folder that is not empty?
...erence: shutil.rmtree.
By design, rmtree fails on folder trees containing read-only files. If you want the folder to be deleted regardless of whether it contains read-only files, then use
shutil.rmtree('/folder_name', ignore_errors=True)
...
Longest line in a file
...l commands. Takes filename as first argument:
#!/bin/sh
MAX=0 IFS=
while read -r line; do
if [ ${#line} -gt $MAX ]; then MAX=${#line}; fi
done < "$1"
printf "$MAX\n"
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