Tutorial by Examples: l

Modifying the strings returned by the standard functions getenv(), strerror() and setlocale() is undefined. So, implementations may use static storage for these strings. The getenv() function, C11, §7.22.4.7, 4, says: The getenv function returns a pointer to a string associated with the matched...

To execute a function within a loop in node.js, it's fine to use a for loop for short loops. But the loop is long, using for loop will increase the time of processing which might cause the node process to hang. In such scenarios, you can use: asycn.times function recursiveAction(n, callback) { ...

When we want to handle array of data, its better to use async.each. When we want to perform something with all data & want to get the final callback once everything is done, then this method will be useful. This is handled in parallel way. function createUser(userName, callback) { //creat...

OpenLayers 3 or as it is referred OL-3 is a Javascript Library for web mapping, so in order to use it you'll need to add it in your html: first add the ol.css file to use the map styling of OL-3 : then add the ol.js file : you can also download OL-3 from the official site www.openlaye...

var path = "/test_javascript_upload.txt"; var content = "data to upload"; var accessToken = "<ACCESS_TOKEN>"; var uploadUrl = "https://content.dropboxapi.com/2/files/upload" var result; var xhr = new XMLHttpRequest(); xhr.onreadystatechange = fun...

To Retrieve URL path in STATIC BLOCK Or CMS pages To get SKIN URL {{skin url=’images/sampleimage.jpg’}} To get Media URL {{media url=’/sampleimage.jpg’}} To get Store URL {{store url=’mypage.html’}} To get Base URL {{base url=”}} TO Retrieve URL path in PHTML Not secure Skin URL &...

\m : Beginning of a word. \M : End of a word. \y : Word boundary. \Y : a point that is not a word boundary. \Z : matches end of data. Documentation: re_syntax

# example data DT = data.table(id = c(1,2,2,3,3,3))[, v := LETTERS[.I]][] To deal with "duplicates," combine counting rows in a group and subsetting rows by group. Keep one row per group Aka "drop duplicates" aka "deduplicate" aka "uniquify." unique(DT,...

A bit field is a variable that holds various boolean states as individual bits. A bit on would represent true, and off would be false. In the past bit fields were routinely used as they saved memory and reduced processing load. Though the need to use bit field is no longer so important they do offer...

How to get FusionCharts: Download from the FusionCharts official website Install via npm: # Install fusioncharts package npm install fusioncharts # Install fusionmaps package npm install fusionmaps Install via bower: # Install fusioncharts package bower install fusioncharts #...

Literals in RDF may be language tagged strings. These literals have a text part as well as a language tag. For instance, the literal "color"@en has the text part "color" and the language tag "en". In a SPARQL query, use the lang function to get the language of a lite...

The SPARQL function langMatches can be used to compare the language tags of RDF literals in SPARQL queries. The simple equality operator, =, can be used to compare exact string matches, but will not correctly consider regional variants. For instance, the four possible values of ?str in: values ...

Even with identical tokens for inline functions, ODR can be violated if lookup of names doesn't refer to the same entity. let's consider func in following: header.h void overloaded(int); inline void func() { overloaded('*'); } foo.cpp #include "header.h" void foo() { ...

First, make sure your app can be backed up in AndroidManifest.xml, i.e. android:allowBackup is not false. Backup command: adb -s <device_id> backup -noapk <sample.package.id> Create a tar with dd command: dd if=backup.ab bs=1 skip=24 | python -c "import zlib,sys;sys.stdout.wri...

You may use this command for listing the files for your own debuggable apk: adb shell run-as <sample.package.id> ls /data/data/sample.package.id/cache And this script for pulling from cache, this copy the content to sdcard first, pull and then remove it at the end: #!/bin/sh adb shell &q...

Given the text file employee.txt 1|Arthur Dent 2|Marvin 3|Zaphod Beeblebrox $ mysqlimport --fields-terminated-by='|' mycompany employee.txt

This example is useful for windows-like endings: $ mysqlimport --lines-terminated-by='\r\n' mycompany employee.txt

Given the table Employee idName3Yooden Vranx And the file employee.txt 1 \t Arthur Dent 2 \t Marvin 3 \t Zaphod Beeblebrox The --ignore option will ignore the entry on duplicate keys $ mysqlimport --ignore mycompany employee.txt idName1Arthur Dent2Marvin3Yooden Vranx The --replace opt...

$ mysqlimport --where="id>2" mycompany employee.txt

Template Haskell is enabled by the -XTemplateHaskell GHC extension. This extension enables all the syntactic features further detailed in this section. The full details on Template Haskell are given by the user guide. Splices A splice is a new syntactic entity enabled by Template Haskell, writ...