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Why does my application spend 24% of its life doing a null check?
...t store a copy of the bytes in RAM. An important one is the L1 cache, typically 16 kilobytes for data and 16 kilobytes for instructions. Small, allowing it to be close to the execution engine. Reading bytes from the L1 cache typically takes 2 or 3 CPU cycles. Next up is the L2 cache, bigger and slow...
How do you pass arguments to define_method?
... your defined method accepts arguments. When you define a method you're really just nicknaming the block and keeping a reference to it in the class. The parameters come with the block. So:
define_method(:say_hi) { |other| puts "Hi, " + other }
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Is it worthwile to learn assembly language? [closed]
...end it as a good introduction to the language itself -- although for the really interesting stuff you have to hunt out obsessives on the net.
I think it's useful to understand what happens at the lower levels. As you research assembler you will learn about cpu pipelining, branch prediction, cache a...
C++ Erase vector element by value rather than by position? [duplicate]
... @jak: Take a look at the description of remove(): It moves all values not equal to the value passed to the beginning of the range [begin,end). With your example in the question you'd get 5,9,2,0,7,7. As remove() however returns an iterator to the new end, vec.erase() can remove the o...
Node.js setting up environment specific configs to be used with everyauth
I am using node.js + express.js + everyauth.js. I have moved all my everyauth logic into a module file
9 Answers
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How do you use bcrypt for hashing passwords in PHP?
...d salts (bcrypt REQUIRES salts) and you can be sure that an attack is virtually unfeasible without either ludicrous amount of funds or hardware.
bcrypt uses the Eksblowfish algorithm to hash passwords. While the encryption phase of Eksblowfish and Blowfish are exactly the same, the key schedule pha...
“Add unimplemented methods” feature in the Android Studio
In the Eclipse IDE there is a great feature allows you to add (implement) all of the required methods of the particular class. I'm looking for this feature in the Android Studio IDE, but without success so far. Is there something similar? For me it is one of the key-features and can't live without.
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How to find if a native DLL file is compiled as x64 or x86?
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You can use DUMPBIN too. Use the /headers or /all flag and its the first file header listed.
dumpbin /headers cv210.dll
64-bit
Microsoft (R) COFF/PE Dumper Version 10.00.30319.01
Copyright (C) Microsoft Corporation. All rights reserved.
Dump of file cv210.dll
PE ...
PDO MySQL: Use PDO::ATTR_EMULATE_PREPARES or not?
...er using the binary protocol. In other words, the same PDO code will be equally vulnerable (or not-vulnerable) to injection attacks regardless of your EMULATE_PREPARES setting. The only difference is where the parameter replacement occurs--with EMULATE_PREPARES, it occurs in the PDO library; without...
PHP - Get key name of array value
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array_filter() can be used if you need to return all matching results instead of just the first matching one, as it preserves keys.
– Mike Lyons
Nov 27 '14 at 1:40
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