Tutorial by Examples: com

Recommendation Because the symbols i and j can represent significantly different things in MATLAB, their use as loop indices has split the MATLAB user community since ages. While some historic performance reasons could help the balance lean to one side, this is no longer the case and now the choice...

Required compiler features can be specified on a target using the command target_compile_features: add_library(foo foo.cpp ) target_compile_features(foo PRIVATE # scope of the feature cxx_constexpr # list of features ) The features must be part of CMAKE_C_COMPILE_FE...

Design (layout XML): <AutoCompleteTextView android:id="@+id/autoCompleteTextView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_centerHorizontal="true&...

Composing multiple functions into one is a functional programming common practice; composition makes a pipeline through which our data will transit and get modified simply working on the function-composition (just like snapping pieces of a track together)... you start out with some single responsi...

Warning! Apply shadows sparingly! Applying shadowing is expensive and is multiplicatively expensive if you apply shadowing inside an animation loop. Instead, cache a shadowed version of your image (or other drawing): At the start of your app, create a shadowed version of your image in a secon...

Use the fst and snd functions (from Prelude or Data.Tuple) to extract the first and second component of pairs. fst (1, 2) -- evaluates to 1 snd (1, 2) -- evaluates to 2 Or use pattern matching. case (1, 2) of (result, _) => result -- evaluates to 1 case (1, 2) of (_, result) => resu...

Use swap (from Data.Tuple) to swap the components of a pair. import Data.Tuple (swap) swap (1, 2) -- evaluates to (2, 1) Or use pattern matching. case (1, 2) of (x, y) => (y, x) -- evaluates to (2, 1)

Android Activity package com.example.myapp; import android.os.Bundle; import android.app.Activity; import android.webkit.WebView; public class WebViewActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceSta...

Basic Example package com.example.myapp; import android.os.Bundle; import android.app.Activity; import android.webkit.WebView; public class WebViewActivity extends Activity { private Webview webView; @Override protected void onCreate(Bundle savedInstanceState) { ...

Using comments in your projects is a handy way of leaving explanations of your design choices, and should aim to make your (or someone else's) life easier when maintaining or adding to the code. There are a two ways of adding a comment to your code. Single line comments Any text placed after // w...

SQL Server 2008 R2 SET TRANSACTION ISOLATION LEVEL READ COMMITTED This isolation level is the 2nd most permissive. It prevents dirty reads. The behavior of READ COMMITTED depends on the setting of the READ_COMMITTED_SNAPSHOT: If set to OFF (the default setting) the transaction uses shared l...

php bin/magento setup:di:compile You might need to delete var/di (including the folder) in order to go through compilation. rm -rf var/di

To fold (combine) two patches: hg qnew firstPatch // Create first patch hg qnew secondPatch // Create second patch hg qpop // Pop secondPatch hg qfold secondPatch // Fold secondPatch with firstPatch

qnew: create a new patch qpop: pop the current patch off the stack qpush: push the next patch onto the stack qrefresh: update the current patch qapplied: print the patches already applied qseries: print the entire series file qfinish: move applied patches into repository history qdelete: re...

Documenting your work Remember what you've done and retain long outputs which can't be kept in WinDbg's buffer. It's always good to have a log available for reproducing debugging steps, e.g. to ask questions on Stack Overflow. CommandPurpose.logopencreate a log file.logcloseclose the log file.dump...

Print the path to the active developer directory (selected Xcode) xcode-select -p Select a different version of Xcode, e.g. Beta sudo xcode-select -s /Applications/Xcode-beta.app Reset to the default version of Xcode sudo xcode-select -r This is equivalent to running sudo xcode-select -s /Appl...

Determine your key ID gpg --list-secret-keys --keyid-format LONG /Users/davidcondrey/.gnupg/secring.gpg -------------------------------------- sec 2048R/YOUR-16-DIGIT-KEY-ID YYYY-MM-DD [expires: YYYY-MM-DD] Your ID is a alphanumeric 16-digit code following the first forward-slash. ...

echo off cls sqlcmd.exe -S "your server name" -U "sql user name" -P "sql password" -d "name of databse" -Q "here you may write your query/stored procedure" Batch files like these can be used to automate tasks, for example to make backups of ...

To use opacity in all versions of IE, the order is: .transparent-element { /* for IE 8 & 9 */ -ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=60)"; // IE8 /* works in IE 8 & 9 too, but also 5, 6, 7 */ filter: alpha(opacity=60); // IE 5-7 /* Modern Browse...

This command has several related yet distinct forms. del v If v is a variable, the command del v removes the variable from its scope. For example: x = 5 print(x) # out: 5 del x print(x) # NameError: name 'f' is not defined Note that del is a binding occurence, which means that unless expl...