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  • How best to deal with the frustration that you encounter at the beginning of learning to code [closed]

    - by coderboy
    I am right now a newbie on the job learning to code in Cocoa . In the beginning I decided that I would try and understand everything I was doing . But right now I just feel like a clueless wizard chanting some spells . Its all just a matter of googling the right incantation . Frequently getting stuck and having to google for answers is proving to be a major demotivator for me . I know that this will get better over time but still I feel that somewhere , somehow I'm just approaching things the wrong way . I sit there stumped and then finally just look at sample code from Apple and I go Wow ! This is so logical and well structured ! . But just reading it is not going to get me to that level . So I would like to know , how do you guys approach learning something new . Do you read the whole documentation first , or do you read sample code or maybe its just about making lots of small programs first ?

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  • Cat all files in a directory, with a specific file at the beginning an end...?

    - by Aeisor
    Is there a way to cat all files in a given directory, but with a particular file at the beginning and end? For example, say I have: file1.js, file2.js, file3.js, file4.js, file5.js -- Effectively I would like to cat file2.js file*.js file3.js > /var/www/output.js I've tried a few variations of these find ! -name "file2.js" ! -name "file3.js" -type f -exec cat file2.js {} file3.js > /var/www/js/output.js \; find ! -name "file2.js" ! -name "file3.js" -type f | xargs -I files cat file2.js files file3.js > /var/www/output.js but the best I can get out of it is file2.js added before and file3.js added after all other files (multiple times) I know I could specify the files in the order I wanted manually, but this is not maintainable (I'm expecting, potentially 100 files). I have looked through man cat, as well as a handful of websites devoted to xargs, find and cat to no avail. Thanks in advance.

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  • SQL SERVER – Step by Step Guide to Beginning Data Quality Services in SQL Server 2012 – Introduction to DQS

    - by pinaldave
    Data Quality Services is a very important concept of SQL Server. I have recently started to explore the same and I am really learning some good concepts. Here are two very important blog posts which one should go over before continuing this blog post. Installing Data Quality Services (DQS) on SQL Server 2012 Connecting Error to Data Quality Services (DQS) on SQL Server 2012 This article is introduction to Data Quality Services for beginners. We will be using an Excel file Click on the image to enlarge the it. In the first article we learned to install DQS. In this article we will see how we can learn about building Knowledge Base and using it to help us identify the quality of the data as well help correct the bad quality of the data. Here are the two very important steps we will be learning in this tutorial. Building a New Knowledge Base  Creating a New Data Quality Project Let us start the building the Knowledge Base. Click on New Knowledge Base. In our project we will be using the Excel as a knowledge base. Here is the Excel which we will be using. There are two columns. One is Colors and another is Shade. They are independent columns and not related to each other. The point which I am trying to show is that in Column A there are unique data and in Column B there are duplicate records. Clicking on New Knowledge Base will bring up the following screen. Enter the name of the new knowledge base. Clicking NEXT will bring up following screen where it will allow to select the EXCE file and it will also let users select the source column. I have selected Colors and Shade both as a source column. Creating a domain is very important. Here you can create a unique domain or domain which is compositely build from Colors and Shade. As this is the first example, I will create unique domain – for Colors I will create domain Colors and for Shade I will create domain Shade. Here is the screen which will demonstrate how the screen will look after creating domains. Clicking NEXT it will bring you to following screen where you can do the data discovery. Clicking on the START will start the processing of the source data provided. Pre-processed data will show various information related to the source data. In our case it shows that Colors column have unique data whereas Shade have non-unique data and unique data rows are only two. In the next screen you can actually add more rows as well see the frequency of the data as the values are listed unique. Clicking next will publish the knowledge base which is just created. Now the knowledge base is created. We will try to take any random data and attempt to do DQS implementation over it. I am using another excel sheet here for simplicity purpose. In reality you can easily use SQL Server table for the same. Click on New Data Quality Project to see start DQS Project. In the next screen it will ask which knowledge base to use. We will be using our Colors knowledge base which we have recently created. In the Colors knowledge base we had two columns – 1) Colors and 2) Shade. In our case we will be using both of the mappings here. User can select one or multiple column mapping over here. Now the most important phase of the complete project. Click on Start and it will make the cleaning process and shows various results. In our case there were two columns to be processed and it completed the task with necessary information. It demonstrated that in Colors columns it has not corrected any value by itself but in Shade value there is a suggestion it has. We can train the DQS to correct values but let us keep that subject for future blog posts. Now click next and keep the domain Colors selected left side. It will demonstrate that there are two incorrect columns which it needs to be corrected. Here is the place where once corrected value will be auto-corrected in future. I manually corrected the value here and clicked on Approve radio buttons. As soon as I click on Approve buttons the rows will be disappeared from this tab and will move to Corrected Tab. If I had rejected tab it would have moved the rows to Invalid tab as well. In this screen you can see how the corrected 2 rows are demonstrated. You can click on Correct tab and see previously validated 6 rows which passed the DQS process. Now let us click on the Shade domain on the left side of the screen. This domain shows very interesting details as there DQS system guessed the correct answer as Dark with the confidence level of 77%. It is quite a high confidence level and manual observation also demonstrate that Dark is the correct answer. I clicked on Approve and the row moved to corrected tab. On the next screen DQS shows the summary of all the activities. It also demonstrates how the correction of the quality of the data was performed. The user can explore their data to a SQL Server Table, CSV file or Excel. The user also has an option to either explore data and all the associated cleansing info or data only. I will select Data only for demonstration purpose. Clicking explore will generate the files. Let us open the generated file. It will look as following and it looks pretty complete and corrected. Well, we have successfully completed DQS Process. The process is indeed very easy. I suggest you try this out yourself and you will find it very easy to learn. In future we will go over advanced concepts. Are you using this feature on your production server? If yes, would you please leave a comment with your environment and business need. It will be indeed interesting to see where it is implemented. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Business Intelligence, Data Warehousing, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology Tagged: Data Quality Services, DQS

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  • Beginning on MySQL 5.6? Take the New MySQL for Beginners Training

    - by Antoinette O'Sullivan
    The MySQL for Beginners training course is a great way of for you to learn about the world's more popular open source database. During this 4 day course, epxert instructors will teach you how to use MySQL Server 5.6 and the latest tools while helping you develop deeper knowledge of using relational databases. You can take this live-instructor course as a: Live-Virtual event: Take this course from your own desk, choosing from a selection of events on the schedule to suit different time-zones. In-Class Event: Travel to an education center to follow this course. Below is a selection of events already on the schedule.  Location  Date  Delivery Language  Brussels, Belgium  8 September 2013  English  London, England  1 July 2013  English  Berlin, Germany  2 September 2013  German  Stuttgart, Germany  28 October 2013  German  Riga, Latvia  26 August 2013  Latvian Utrecht, Netherlands  9 September 2013  English   Warsaw, Poland  15 July 2013  Polish  Cape Town, South Africa  22 July 2013  English  Petaling Jaya, Malaysia  22 July 2013  English  Sao Paulo, Brazil  7 October 2013  Brazilian Portugese To register for this course or to learn more about the authentic MySQL curriculum, go to http://oracle.com/education/mysql.

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  • How can I start the right way from the beginning in learning web development?

    - by Steve
    Well, I know I have to learn many things such as HTML, JavaScript, CSS, PHP, ASP.NET, SQL, etc. However, I don't know if I start, for example, learning ASP.NET before I learn HTML and CSS then would I say in the near future that it was better for me if i start learning another thing earlier so I don't need to come back and learn it now! You guys, who have the experience in web development, know after you have reached what you are now how should the right start be! So, can you tell me how?

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  • Beginning programming for real clients, what copyright should I put in the code?

    - by Igor Marvinsky
    Hello. So far, I've been writing projects for my friends and friends of my friends, which required no legal stuff. Now I've moved on to freelance programming on websites like vworker.com and I'm wondering what should I put in the comments on top of the code. I'm not doing big, serious serious projects, just frontends and scrapers/bots for what I gather is personal use. Would my usual // Written by Igor Marvinsky, 2011 be enough?

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  • What are the basic skills a BEGINNING JavaScript programmer should have?

    - by Sanford
    In NYC, we are working on creating a collaborative community programming environment and trying to segment out software engineers into differing buckets. At present, we are trying to define: Beginners Intermediates Advanced Experts (and/or Masters) Similar to an apprenticeship, you would need to demonstrate specific skills to achieve different levels. Right now, we have identified Beginner programming skills as: Object - method, attributes, inheritance Variable - math, string, array, boolean - all are objects Basic arithmetic functions - precedence of functions String manipulation Looping - flow control Conditionals - boolean algebra This is a first attempt, and it is a challenge since we know the natural tension between programming and software engineering. How would you create such a skills-based ranking for JavaScript in this manner? For example, what would be the Beginner Javascript skills that you would need to have to advance to the Intermediate Training? And so on.

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  • Scraped HTML is not written at the beginning of text file.

    - by karikari
    Currently, I'm scraping the HTML code of a page, and writing it to a text file. My problem is, why must there be empty spaces or empty lines at the beginning? The HTML codes written to the txt file do not seem to start at the beginning of the text file. This means that the '<' is not located at the position 0 of the txt file. After a few runs, my HTML is always written a few lines down inside the text file. Can anyone tell me why?

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  • Scrapped HTML does not written at the beginning of text file.

    - by karikari
    Currently, I'm scraping the HTML code of a page, and write it to a txt file. My problem is, why there must be empty spaces or empty lines at the beginning? The HTML codes written to the txt file, seems does not start at the beginning of the txt file. Means, the '<' does not located at the position 0 of the txt file. After a few runs, my HTML is always written a few lines down inside the txt file. Can anyone tell me why : )

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  • Adding text to the beginning and end of a number of files?

    - by John Feminella
    I have a number of files in a directory hierarchy. For each file, I'd like to add "abcdef" to the beginning, on its own line, and "ghijkl" to the end, on its own line. For example, if the files initially contained: # one/foo.txt apples bananas # two/three/bar.txt coconuts Then afterwards, I'd expect them to contain: # one/foo.txt abcdef apples bananas ghijkl # two/three/bar.txt abcdef coconuts ghijkl What's the best way to do this? I've gotten as far as: # put stuff at start of file find . -type f -print0 | xargs -0 sed -i 's/.../abcdef/g' # put stuff at end of file find . -type f -print0 | xargs -0 sed -i 's/.../ghijkl/g' but I can't seem to figure out how what to put in the ellipses.

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  • BASH Expression to replace beginning and ending of a string in one operation?

    - by swestrup
    Here's a simple problem that's been bugging me for some time. I often find I have a number of input files in some directory, and I want to construct output file names by replacing beginning and ending portions. For example, given this: source/foo.c source/bar.c source/foo_bar.c I often end up writing BASH expressions like: for f in source/*.c; do a="obj/${f##*/}" b="${a%.*}.obj" process "$f" "$b" done to generate the commands process "source/foo.c" "obj/foo.obj" process "source/bar.c "obj/bar.obj" process "source/foo_bar.c "obj/foo_bar.obj" The above works, but its a lot wordier than I like, and I would prefer to avoid the temporary variables. Ideally there would be some command that could replace the beginning and ends of a string in one shot, so that I could just write something like: for f in source/*.c; do process "$f" "obj/${f##*/%.*}.obj"; done Of course, the above doesn't work. Does anyone know something that will? I'm just trying to save myself some typing here.

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  • how to calculate the beginning of a day given milliseconds?

    - by conman
    i want to figure out the time from the beginning of the day given a days milliseconds. so say i'm given this: 1340323100024 which is like mid day of 6/21/2012. now i want the milliseconds from the beginning of the day, which would be 1340262000000 (at least i think that's what it's supposed to be.) how do i get 1340262000000 from 1340323100024? i tried doing Math.floor(1340323100024/86400000) * 86400000 but that gives me 1340236800000, which if i create a date object out of it, says its the 20th. i know i can create a date object from 1340323100024, then get the month, year, and date, to create a new object which would give me 1340262000000, but i find it ridiculous i can't figure out something so simple. any help would be appreciated. btw, i'm doing this in javascript if it makes any difference.

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  • how to make Xcode indentation from beginning of previous line?

    - by Mikkel
    ok, possibly insanely n00b question or something i have overlooked in Xcode prefs: On pressing return, in stead of Xcode's syntax-aware indentation doing smart indent from whatever brackets i've used on the previous line, how can I make it so Xcode indents just from the beginning of the previous line? From the picture below, first block of code is what i got, second block of code is what I want. Visual representation:

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  • Do you put a super() call a the beginning of your constructors?

    - by sleske
    This is a question about coding style and recommended practices: As explained in the answers to the question unnecessary to put super() in constructor?, if you write a constructor for a class that is supposed to use the default (no-arg) constructor from the superclass, you may call super() at the beginning of your constructor: public MyClass(int parm){ super(); // leaving this out makes no difference // do stuff... } but you can also omit the call; the compiler will in both cases act as if the super() call were there. So then, do you put the call into your constructors or not? On the one hand, one might argue that including the super() makes things more explicit. OTOH, I always dislike writing redundant code, so personally I tend to leave it out; I do however regularly see it in code from others. What are your experiences? Did you have problems with one or the other approach? Do you have coding guidelines which prescribe one approach?

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  • Tabular.vim : how to align on the first occurrence of 2 different delimiters placed at the beginning of Words?

    - by ThG
    I have installed the Tabular plugin, which works very well for me, as long as there are no complicated regexes involved… But I have this list : one @abc @rstuvw &foo three @defg &bar four @mn @opq &kludge &hack twelve @hijkl &baz &quux I wish to align it that way (on @… first, then on &…) : one @abc @rstuvw &foo three @defg &bar four @mn @opq &kludge &hack twelve @hijkl &baz &quux which means I have 3 problems at the same time : align on the first occurrence of 2 different delimiters (@ and &) which are not really delimiters but "special characters" at the beginning of Words This is far beyond my understanding of both regexes and Tabular.vim How should I proceed ?

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  • Beginning Programmer Interested in Android - Should I Start with Java?

    - by Hudey
    I'm a beginner in programming. My experience so far is only in Actionscript 2 and 3. So I have a basic understanding of declaring variables, loops, arrays, if/then, do/while... I'm wanting to move to developing for Android phones so I'm wondering what suggestions people have for where to go next. Should I jump right to Android? Start with a 'beginning Java' approach? Or should I go some other route to beef up my knowledge of OOP concepts before launching into Android? I have my Dev environment set up and completed the Hello Android tutorial and I'm just wondering if I am going to be in over my head quickly?

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  • how can i move ext3 partition to the beginning of drive without losing data?

    - by Felipe Alvarez
    I have a 500GB external drive. It had two partitions, each around 250GB. I removed the first partition. I'd like to move the 2nd to the left, so it consumes 100% of the drive. How can this be accomplished without any GUI tools (CLI only)? fdisk Disk /dev/sdd: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0xc80b1f3d Device Boot Start End Blocks Id System /dev/sdd2 29374 60801 252445410 83 Linux parted Model: ST350032 0AS (scsi) Disk /dev/sdd: 500GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 2 242GB 500GB 259GB primary ext3 type=83 dumpe2fs Filesystem volume name: extstar Last mounted on: <not available> Filesystem UUID: f0b1d2bc-08b8-4f6e-b1c6-c529024a777d Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal dir_index filetype needs_recovery sparse_super large_file Filesystem flags: signed_directory_hash Default mount options: (none) Filesystem state: clean Errors behavior: Continue Filesystem OS type: Linux Inode count: 15808608 Block count: 63111168 Reserved block count: 0 Free blocks: 2449985 Free inodes: 15799302 First block: 0 Block size: 4096 Fragment size: 4096 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 8208 Inode blocks per group: 513 Filesystem created: Mon Feb 15 08:07:01 2010 Last mount time: Fri May 21 19:31:30 2010 Last write time: Fri May 21 19:31:30 2010 Mount count: 5 Maximum mount count: 29 Last checked: Mon May 17 14:52:47 2010 Check interval: 15552000 (6 months) Next check after: Sat Nov 13 14:52:47 2010 Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 256 Required extra isize: 28 Desired extra isize: 28 Journal inode: 8 Default directory hash: half_md4 Directory Hash Seed: d0363517-c095-4f53-baa7-7428c02fbfc6 Journal backup: inode blocks Journal size: 128M

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  • Is it possible to use ffmpeg to trim off X seconds from the beginning of a video with an unspecified length?

    - by marcelebrate
    I need to trim the just the first 1 or 2 seconds off of a series of FLV recordings of varying, unspecified lengths. I've found plenty of resources for extracting a specified duration from a video (e.g. 30 second clips), but none for continuing to the end of a video. Both of these attempts just yield a copied version of the video, sans desired trimming: ffmpeg -ss 2 -vcodec copy -acodec copy -i input.flv output.flv ffmpeg -ss 2 -t 120 -vcodec copy -acodec copy -i input.flv output.flv The thought on the second one was: perhaps if I specified a length beyond what was possible, it'd just go to the end. No dice. I know it's not an issue with codecs or using seconds instead of timecode since the following worked a charm: ffmpeg -ss 2 -t 5 -vcodec copy -acodec copy -i input.flv output.flv Any other ideas? I'm open to using other (Windows-based) command line tools, however am strongly favoring ffmpeg since I'm already using it for thumbnail creation and am familiar with it. If it helps, my videos will all be under 2 minutes.

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  • Getting "" at the beginning of my XML File after save()

    - by Remy
    I'm opening an existing XML file with c# and I replace some nodes in there. All works fine. Just after I save it, I get the following characters at the beginning of the file:  (EF BB BF in HEX) The whole first line: <?xml version="1.0" encoding="UTF-8" standalone="yes"?> The rest of the file looks like a normal XML file. The simplified code is here: XmlDocument doc = new XmlDocument(); doc.Load(xmlSourceFile); XmlNode translation = doc.SelectSingleNode("//trans-unit[@id='127']"); translation.InnerText = "testing"; doc.Save(xmlTranslatedFile); I'm using a C# WinForm Application. With .NET 4.0. Any ideas? Why would it do that? Can we disable that somehow? It's for Adobe InCopy and it does not open it like this. UPDATE: Alternative Solution: Saving it with the XmlTextWriter works too: XmlTextWriter writer = new XmlTextWriter(inCopyFilename, null); doc.Save(writer);

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  • What does ~ in the beginning of an URL in asp.net exactly do ?

    - by MarceloRamires
    I am editing a certain website which before used the port 80 (default) that was not required at the url (because it's default..) But the port had (for technical reasons) to be changed, and now it has to be informed. I can access the main page through ip:port\page like this: 1.2.3.4:81\page.aspx Every link in the website is composed like this: <asp:HyperLink runat="server" Text="random" NavigateUrl="~/fdr/whatever.aspx" /> And whenever I click on a link, the page doesn't load, but the URL is composed on the URL bar of the browser, then I simply add ":80" after the IP in the URL and it works. Due to the existance of querystrings (in other words, for already having access to the URL) I before thought that '~' in the beginning of a URL in a link was saying "keep in the same website, just change to this webpage in this folder", but if the port vanishes, I assume now that the address is requested (probably to IIS) the location of the current website. I want to know then (instead of having to add the port to each link in my website) how do I set up whoever is requested by the ~ in the link to add the port somehow. How do I do that?

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