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Encrypt and decrypt a string in C#?
...Copy(nonSecretPayload, payload, nonSecretPayload.Length);
int payloadIndex = nonSecretPayload.Length;
byte[] cryptKey;
byte[] authKey;
//Use Random Salt to prevent pre-generated weak password attacks.
using (var generator = new Rfc2898DeriveBytes(password, SaltBitSize ...
get keys of json-object in JavaScript [duplicate]
... I am trying to convert rows from DB to JSON. I am getting numerical index along with actual column names as keys. Why I am getting numerical index?
– Nguai al
Jul 24 at 16:41
...
How to change facet labels?
...beller=hospital_labeller)
...
This uses the levels of the data frame to index the hospital_names list, returning the list values (the correct names).
Please note that this only works if you only have one faceting variable. If you have two facets, then your labeller function needs to return a d...
Cannot install packages using node package manager in Ubuntu
...of doing symlink by hand. Here is a link to this package in Debian package index website.
It can be installed using sudo apt-get install nodejs-legacy.
I have not found any information about adopting the whole thing by NPM developers, but I think npm package will be fixed on some point and nodejs-...
how to run two commands in sudo?
...any way how I can run two Db2 commands from a command line? (They will be called from a PHP exec command.)
10 Answers
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IN vs OR in the SQL WHERE Clause
... is faster.
I tried both on a MySQL with 1000000 rows. When the column is indexed there is no discernable difference in performance - both are nearly instant. When the column is not indexed I got these results:
SELECT COUNT(*) FROM t_inner WHERE val IN (1000, 2000, 3000, 4000, 5000, 6000, 7000, 80...
How to delete/create databases in Neo4j?
...
there may be not only nodes and edges, but also indexes in the DB, and it's more difficult to get rid of those. also, i just managed to ruin a DB instance by massive repeated testing including deletions and it looks like physically deleting the DB files and having Neo4J re...
Pimpl idiom vs Pure virtual class interface
...ures is enough. OTOH in pure abstract case they effectively link by vtable index so reordering methods or inserting in the middle will break compatibility.
– SnakE
Nov 25 '15 at 11:13
...
Recursive search and replace in text files on Mac and Linux
...the linux shell, the following command will recursively search and replace all instances of 'this' with 'that' (I don't have a Linux shell in front of me, but it should do).
...
JSON Array iteration in Android/Java
...or iterator() {
return this.myArrayList.iterator();
}
This will make all instances of JSONArray iterable, meaning that the for (Object foo : bar) syntax will now work with it (note that foo has to be an Object, because JSONArrays do not have a declared type). All this works because the JSONArr...