Cannot use a leading ../ to exit above the top directory

In my case it turned out to be commented out HTML in a master page!

Who knew that commented out HTML such as this were actually interpreted by ASP.NET!

<!--
<link rel="icon" href="../../favicon.ico">
-->

WP -- Get posts by category?

'category_name'=>'this cat' also works but isn't printed in the WP docs

PhoneGap Eclipse Issue - eglCodecCommon glUtilsParamSize: unknow param errors

It's very annoying. I'm not sure why Google places it there - no one needs these trash from emulator at all; we know what we are doing. I'm using pidcat and I modified it a bit
BUG_LINE = re.compile(r'.*nativeGetEnabledTags.*') BUG_LINE2 = re.compile(r'.*glUtilsParamSize.*') BUG_LINE3 = re.compile(r'.*glSizeof.*')

and
bug_line = BUG_LINE.match(line) if bug_line is not None: continue bug_line2 = BUG_LINE2.match(line) if bug_line2 is not None: continue bug_line3 = BUG_LINE3.match(line) if bug_line3 is not None: continue

It's an ugly fix and if you're using the real device you may need those OpenGL errors, but you got the idea.

How can I count the numbers of rows that a MySQL query returned?

> SELECT COUNT(*) AS total FROM foo WHERE bar= 'value';

Creating a border like this using :before And :after Pseudo-Elements In CSS?

See the following snippet, is this what you want?

_x000D_

body {
    background: silver;
    padding: 0 10px;
}

#content:after {
    height: 10px;
    display: block;
    width: 100px;
    background: #808080;
    border-right: 1px white;
    content: '';
}

#footer:before {
    display: block;
    content: '';
    background: silver;
    height: 10px;
    margin-top: -20px;
    margin-left: 101px;
}

#content {
    background: white;
}


#footer {
    padding-top: 10px;
    background: #404040;
}

p {
    padding: 100px;
    text-align: center;
}

#footer p {
    color: white;
}

_x000D_

<body>
    <div id="content"><p>#content</p></div>
    <div id="footer"><p>#footer</p></div>
</body>

_x000D_

JSFiddle

setting textColor in TextView in layout/main.xml main layout file not referencing colors.xml file. (It wants a #RRGGBB instead of @color/text_color)

You have a typo in your xml; it should be:

android:textColor="@color/text_color"

that's "@color" without the 's'.

XSLT counting elements with a given value

This XPath:

count(//Property[long = '11007'])

returns the same value as:

count(//Property/long[text() = '11007'])

...except that the first counts Property nodes that match the criterion and the second counts long child nodes that match the criterion.

As per your comment and reading your question a couple of times, I believe that you want to find uniqueness based on a combination of criteria. Therefore, in actuality, I think you are actually checking multiple conditions. The following would work as well:

count(//Property[@Name = 'Alive'][long = '11007'])

because it means the same thing as:

count(//Property[@Name = 'Alive' and long = '11007'])

Of course, you would substitute the values for parameters in your template. The above code only illustrates the point.

EDIT (after question edit)

You were quite right about the XML being horrible. In fact, this is a downright CodingHorror candidate! I had to keep recounting to keep track of the "Property" node I was on presently. I feel your pain!

Here you go:

count(/root/ac/Properties/Property[Properties/Property/Properties/Property/long = $parPropId])

Note that I have removed all the other checks (for ID and Value). They appear not to be required since you are able to arrive at the relevant node using the hierarchy in the XML. Also, you already mentioned that the check for uniqueness is based only on the contents of the long element.

Inner text shadow with CSS

An elegant example without the need for a positioned wrapper or duplicative content in the markup:

_x000D_

:root {_x000D_
  background: #f2f2f2;_x000D_
}_x000D_
h1 {_x000D_
  background-color: #565656;_x000D_
  font: bold 48px 'Futura';_x000D_
  color: transparent;_x000D_
  text-shadow: 0px 2px 3px rgba(255, 255, 255, 0.8);_x000D_
  -webkit-background-clip: text;_x000D_
  -moz-background-clip: text;_x000D_
  background-clip: text;_x000D_
}

_x000D_

<center>_x000D_
  <h1>Text With Inner Shadow</h1>_x000D_
</center>

_x000D_

Looks good on dark backgrounds as well:

_x000D_

:root {_x000D_
  --gunmetal-gray: #2a3439;_x000D_
  background: var(--gunmetal-gray);_x000D_
}_x000D_
_x000D_
h1[itemprop="headline"] {_x000D_
  font-family: 'Futura';_x000D_
  font-size: 48px;_x000D_
  padding-bottom: 0.35rem;_x000D_
  font-variant-caps: all-small-caps;_x000D_
  background-color: var(--gunmetal-gray);_x000D_
  color: transparent;_x000D_
  text-shadow: 0px 2px 3px rgba(255, 255, 255, 0.1);_x000D_
  -webkit-background-clip: text;_x000D_
  -moz-background-clip: text;_x000D_
  background-clip: text;_x000D_
  filter: brightness(3);_x000D_
}

_x000D_

<center>_x000D_
  <h1 itemprop="headline">Text With Inner Shadow</h1>_x000D_
</center>

_x000D_

AND ME LINK AND ME2 LINK

Creating a LinkedList class from scratch

class Node
{
  int data;
     Node link;

     public Node()
     {
         data=0;
         link=null;
        }

     Node ptr,start,temp;

    void create()throws  IOException
     {
         int n;
         BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
         System.out.println("Enter first data");
         this.data=Integer.parseInt(br.readLine());
         ptr=this;
         start=ptr;
         char ins ='y';
         do
         {
             System.out.println("Wanna Insert another node???");
             ins=(char)br.read();
             br.read();
             if(ins=='y')
             {
                 temp=new Node();
                 System.out.println("Enter next data");
                 temp.data=Integer.parseInt(br.readLine());
                 temp.link=null;
                 ptr.link=temp;
                 temp=null;
                 ptr=ptr.link;
                }
            }while(ins=='y');
        }

public static void main(String args[])throws IOException
     {
       Node first= new Node();
       first.create();
}
}

Composer Warning: openssl extension is missing. How to enable in WAMP

I had the same problem even though openssl was enabled. The issue was that the Composer installer was looking at this config file:

C:\wamp\bin\php\php5.4.3\php.ini

But the config file that's loaded is actually here:

C:\wamp\bin\apache\apache2.2.22\bin\php.ini

So I just had to uncomment it in the first php.ini file and that did the trick. This is how WAMP was installed on my machine by default. I didn't go changing anything, so this will probably happen to others as well. This is basically the same as Augie Gardner's answer above, but I just wanted to point out that you might have two php.ini files.

What is the difference between "mvn deploy" to a local repo and "mvn install"?

From the Maven docs, sounds like it's just a difference in which repository you install the package into:

install - install the package into the local repository, for use as a dependency in other projects locally
deploy - done in an integration or release environment, copies the final package to the remote repository for sharing with other developers and projects.

Maybe there is some confusion in that "install" to the CI server installs it to it's local repository, which then you as a user are sharing?

Sum function in VBA

Range("A10") = WorksheetFunction.Sum(Worksheets("Sheet1").Range("A1", "A9"))

Where

Range("A10") is the answer cell

Range("A1", "A9") is the range to calculate

Target a css class inside another css class

I use div instead of tables and am able to target classes within the main class, as below:

CSS

.main {
    .width: 800px;
    .margin: 0 auto;
    .text-align: center;
}
.main .table {
    width: 80%;
}
.main .row {
   / ***something ***/
}
.main .column {
    font-size: 14px;
    display: inline-block;
}
.main .left {
    width: 140px;
    margin-right: 5px;
    font-size: 12px;
}
.main .right {
    width: auto;
    margin-right: 20px;
    color: #fff;
    font-size: 13px;
    font-weight: normal;
}

HTML

<div class="main">
    <div class="table">
        <div class="row">
            <div class="column left">Swing Over Bed</div>
            <div class="column right">650mm</div>
            <div class="column left">Swing In Gap</div>
            <div class="column right">800mm</div>
        </div>
    </div>
</div>

If you want to style a particular "cell" exclusively you can use another sub-class or the id of the div e.g:

.main #red { color: red; }

<div class="main">
    <div class="table">
        <div class="row">
            <div id="red" class="column left">Swing Over Bed</div>
            <div class="column right">650mm</div>
            <div class="column left">Swing In Gap</div>
            <div class="column right">800mm</div>
        </div>
    </div>
</div>

What primitive data type is time_t?

Unfortunately, it's not completely portable. It's usually integral, but it can be any "integer or real-floating type".

Unix's 'ls' sort by name

You can try:

ls -lru

-u with -lt: sort by, and show, access time;

Java String to Date object of the format "yyyy-mm-dd HH:mm:ss"

Your not applying Date formator. rather you are just parsing the date. to get output in this format

yyyy-MM-dd HH:mm:ss.SSSSSS

we have to use format() method here is full example:- Here is full example:- it will take Date in this format yyyy-MM-dd HH:mm:ss.SSSSSS and as result we will get output as same as this format yyyy-MM-dd HH:mm:ss.SSSSSS

 import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

//TODO OutPut should LIKE in this format yyyy-MM-dd HH:mm:ss.SSSSSS.
public class TestDateExample {

public static void main(String args[]) throws ParseException {

    SimpleDateFormat changeFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSSSSS");

    java.util.Date temp = changeFormat.parse("2012-07-10 14:58:00.000000");
     Date thisDate = changeFormat.parse("2012-07-10 14:58:00.000000");  
    System.out.println(thisDate);
    System.out.println("----------------------------"); 
    System.out.println("After applying formating :");
    String strDateOutput = changeFormat.format(temp);
    System.out.println(strDateOutput);

}

}

How to deserialize a list using GSON or another JSON library in Java?

With Gson, you'd just need to do something like:

List<Video> videos = gson.fromJson(json, new TypeToken<List<Video>>(){}.getType());

You might also need to provide a no-arg constructor on the Video class you're deserializing to.

What is a good naming convention for vars, methods, etc in C++?

consistency and readability (self-documenting code) are important. some clues (such as case) can and should be used to avoid collisions, and to indicate whether an instance is required.

one of the best practices i got into was the use of code formatters (astyle and uncrustify are 2 examples). code formatters can destroy your code formatting - configure the formatter, and let it do its job. seriously, forget about manual formatting and get into the practice of using them. they will save a ton of time.

as mentioned, be very descriptive with naming. also, be very specific with scoping (class types/data/namespaces/anonymous namespaces). in general, i really like much of java's common written form - that is a good reference and similar to c++.

as for specific appearance/naming, this is a small sample similar to what i use (variables/arguments are lowerCamel and this only demonstrates a portion of the language's features):

/** MYC_BEGIN_FILE_ID::FD_Directory_nanotimer_FN_nanotimer_hpp_::MYC_BEGIN_FILE_DIR::Directory/nanotimer::MYC_BEGIN_FILE_FILE::nanotimer.hpp::Copyright... */
#ifndef FD_Directory_nanotimer_FN_nanotimer_hpp_
#define FD_Directory_nanotimer_FN_nanotimer_hpp_

/* typical commentary omitted -- comments detail notations/conventions. also, no defines/macros other than header guards */

namespace NamespaceName {

/* types prefixed with 't_' */
class t_nanotimer : public t_base_timer {
    /* private types */
    class t_thing {
        /*...*/
    };
public:
    /* public types */
    typedef uint64_t t_nanosecond;

    /* factory initializers -- UpperCamel */
    t_nanotimer* WithFloat(const float& arg);
    /* public/protected class interface -- UpperCamel */
    static float Uptime();
protected:
    /* static class data -- UpperCamel -- accessors, if needed, use Get/Set prefix */
    static const t_spoke Spoke;
public:
    /* enums in interface are labeled as static class data */
    enum { Granularity = 4 };
public:
    /* construction/destruction -- always use proper initialization list */
    explicit t_nanotimer(t_init);
    explicit t_nanotimer(const float& arg);

    virtual ~t_nanotimer();

    /*
       public and protected instance methods -- lowercaseCamel()
       - booleans prefer is/has
       - accessors use the form: getVariable() setVariable().
       const-correctness is important
     */
    const void* address() const;
    virtual uint64_t hashCode() const;
protected:
    /* interfaces/implementation of base pure virtuals (assume this was pure virtual in t_base_timer) */
    virtual bool hasExpired() const;
private:
    /* private methods and private static data */
    void invalidate();
private:
    /*
       instance variables
       - i tend to use underscore suffix, but d_ (for example) is another good alternative
       - note redundancy in visibility
     */
    t_thing ivar_;
private:
    /* prohibited stuff */
    explicit t_nanotimer();
    explicit t_nanotimer(const int&);
};
} /* << NamespaceName */
/* i often add a multiple include else block here, preferring package-style inclusions */    
#endif /* MYC_END_FILE::FD_Directory_nanotimer_FN_nanotimer_hpp_ */

How do I rename a repository on GitHub?

Navigate to your repository path.
Click on setting button which is there in right panne.
Replace old repository name to new name.
Click on Rename button

matplotlib colorbar in each subplot

In plt.colorbar(z1_plot,cax=ax1), use ax= instead of cax=, i.e. plt.colorbar(z1_plot,ax=ax1)

Get integer value from string in swift

The method you want is toInt() -- you have to be a little careful, since the toInt() returns an optional Int.

let stringNumber = "1234"
let numberFromString = stringNumber.toInt()
// numberFromString is of type Int? with value 1234

let notANumber = "Uh oh"
let wontBeANumber = notANumber.toInt()
// wontBeANumber is of type Int? with value nil

I am getting "java.lang.ClassNotFoundException: com.google.gson.Gson" error even though it is defined in my classpath

I had the same problem when developing a KNIME Node/plugin in the Eclipse environment. The solution was not only to add the gson.jar as an externar JAR to the build path, it was also required to go to plugin.xml, then the Dependencies tab and add com.google.gson as a required plugin.

How to get current time in python and break up into year, month, day, hour, minute?

For python 3

import datetime
now = datetime.datetime.now()
print(now.year, now.month, now.day, now.hour, now.minute, now.second)

How to delete a stash created with git stash create?

To delete a normal stash created with git stash , you want git stash drop or git stash drop stash@{n}. See below for more details.

You don't need to delete a stash created with git stash create. From the docs:

Create a stash entry (which is a regular commit object) and return its object name, without storing it anywhere in the ref namespace. This is intended to be useful for scripts. It is probably not the command you want to use; see "save" above.

Since nothing references the stash commit, it will get garbage collected eventually.

A stash created with git stash or git stash save is saved to refs/stash, and can be deleted with git stash drop. As with all Git objects, the actual stash contents aren't deleted from your computer until a gc prunes those objects after they expire (default is 2 weeks later).

Older stashes are saved in the refs/stash reflog (try cat .git/logs/refs/stash), and can be deleted with git stash drop stash@{n}, where n is the number shown by git stash list.

What is the iOS 5.0 user agent string?

I found a more complete listing at user agent string. BTW, this site has more than just iOS user agent strings. Also, the home page will "break down" the user agent string of your current browser for you.

Read JSON data in a shell script

Similarly using Bash regexp. Shall be able to snatch any key/value pair.

key="Body"
re="\"($key)\": \"([^\"]*)\""

while read -r l; do
    if [[ $l =~ $re ]]; then
        name="${BASH_REMATCH[1]}"
        value="${BASH_REMATCH[2]}"
        echo "$name=$value"
    else
        echo "No match"
    fi
done

Regular expression can be tuned to match multiple spaces/tabs or newline(s). Wouldn't work if value has embedded ". This is an illustration. Better to use some "industrial" parser :)

Reset textbox value in javascript

In Javascript :

document.getElementById('searchField').value = '';

In jQuery :

$('#searchField').val('');

That should do it

Graphical DIFF programs for linux

If you use Vim, you can use the inbuilt diff functionality. vim -d file1 file2 takes you right into the diff screen, where you can do all sort of merge and deletes.

Remove duplicate elements from array in Ruby

You can remove the duplicate elements with the uniq method:

array.uniq  # => [1, 2, 4, 5, 6, 7, 8]

What might also be useful to know is that uniq takes a block, so if you have a have an array of keys:

["bucket1:file1", "bucket2:file1", "bucket3:file2", "bucket4:file2"]

and you want to know what the unique files are, you can find it out with:

a.uniq { |f| f[/\d+$/] }.map { |p| p.split(':').last }

Set value of hidden input with jquery

This worked for me:

$('input[name="sort_order"]').attr('value','XXX');

If isset $_POST

<?php
    if(isset($_POST['mail']) && $_POST['mail']!='') {
        echo "Yes, mail is set";
    }else{
        echo "N0, mail is not set";
    }
?>

Ruby capitalize every word first letter

Another option is to use a regex and gsub, which takes a block:

'one TWO three foUR'.gsub(/\w+/, &:capitalize)

How to merge lists into a list of tuples?

I am not sure if this a pythonic way or not but this seems simple if both lists have the same number of elements :

list_a = [1, 2, 3, 4]

list_b = [5, 6, 7, 8]

list_c=[(list_a[i],list_b[i]) for i in range(0,len(list_a))]

bodyParser is deprecated express 4

I found that while adding

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({
  extended: true
}));

helps, sometimes it's a matter of your querying that determines how express handles it.

For instance, it could be that your parameters are passed in the URL rather than in the body

In such a case, you need to capture both the body and url parameters and use whichever is available (with preference for the body parameters in the case below)

app.route('/echo')
    .all((req,res)=>{
        let pars = (Object.keys(req.body).length > 0)?req.body:req.query;
        res.send(pars);
    });

What are the differences between git branch, fork, fetch, merge, rebase and clone?

Git

This answer includes GitHub as many folks have asked about that too.

Local repositories

Git (locally) has a directory (.git) which you commit your files to and this is your 'local repository'. This is different from systems like SVN where you add and commit to the remote repository immediately.

Git stores each version of a file that changes by saving the entire file. It is also different from SVN in this respect as you could go to any individual version without 'recreating' it through delta changes.

Git doesn't 'lock' files at all and thus avoids the 'exclusive lock' functionality for an edit (older systems like pvcs come to mind), so all files can always be edited, even when off-line. It actually does an amazing job of merging file changes (within the same file!) together during pulls or fetches/pushes to a remote repository such as GitHub. The only time you need to do manual changes (actually editing a file) is if two changes involve the same line(s) of code.

Branches

Branches allow you to preserve the main code (the 'master' branch), make a copy (a new branch) and then work within that new branch. If the work takes a while or master gets a lot of updates since the branch was made then merging or rebasing (often preferred for better history and easier to resolve conflicts) against the master branch should be done. When you've finished, you merge the changes made in the branch back in to the master repository. Many organizations use branches for each piece of work whether it is a feature, bug or chore item. Other organizations only use branches for major changes such as version upgrades.

Fork: With a branch you control and manage the branch, whereas with a fork someone else controls accepting the code back in.

Broadly speaking, there are two main approaches to doing branches. The first is to keep most changes on the master branch, only using branches for larger and longer-running things like version changes where you want to have two branches available for different needs. The second is whereby you basically make a branch for every feature request, bug fix or chore and then manually decide when to actually merge those branches into the main master branch. Though this sounds tedious, this is a common approach and is the one that I currently use and recommend because this keeps the master branch cleaner and it's the master that we promote to production, so we only want completed, tested code, via the rebasing and merging of branches.

The standard way to bring a branch 'in' to master is to do a merge. Branches can also be "rebased" to 'clean up' history. It doesn't affect the current state and is done to give a 'cleaner' history.

Basically, the idea is that you branched from a certain point (usually from master). Since you branched, 'master' itself has since moved forward from that branching point. It will be 'cleaner' (easier to resolve issues and the history will be easier to understand) if all the changes you have done in a branch are played against the current state of master with all of its latest changes. So, the process is: save the changes; get the 'new' master, and then reapply (this is the rebase part) the changes again against that. Be aware that rebase, just like merge, can result in conflicts that you have to manually resolve (i.e. edit and fix).

One guideline to note:
Only rebase if the branch is local and you haven't pushed it to remote yet!
This is mainly because rebasing can alter the history that other people see which may include their own commits.

Tracking branches

These are the branches that are named origin/branch_name (as opposed to just branch_name). When you are pushing and pulling the code to/from remote repositories this is actually the mechanism through which that happens. For example, when you git push a branch called building_groups, your branch goes first to origin/building_groups and then that goes to the remote repository. Similarly, if you do a git fetch building_groups, the file that is retrieved is placed in your origin/building_groups branch. You can then choose to merge this branch into your local copy. Our practice is to always do a git fetch and a manual merge rather than just a git pull (which does both of the above in one step).

Fetching new branches.

Getting new branches: At the initial point of a clone you will have all the branches. However, if other developers add branches and push them to the remote there needs to be a way to 'know' about those branches and their names in order to be able to pull them down locally. This is done via a git fetch which will get all new and changed branches into the locally repository using the tracking branches (e.g., origin/). Once fetched, one can git branch --remote to list the tracking branches and git checkout [branch] to actually switch to any given one.

Merging

Merging is the process of combining code changes from different branches, or from different versions of the same branch (for example when a local branch and remote are out of sync). If one has developed work in a branch and the work is complete, ready and tested, then it can be merged into the master branch. This is done by git checkout master to switch to the master branch, then git merge your_branch. The merge will bring all the different files and even different changes to the same files together. This means that it will actually change the code inside files to merge all the changes.

When doing the checkout of master it's also recommended to do a git pull origin master to get the very latest version of the remote master merged into your local master. If the remote master changed, i.e., moved forward, you will see information that reflects that during that git pull. If that is the case (master changed) you are advised to git checkout your_branch and then rebase it to master so that your changes actually get 'replayed' on top of the 'new' master. Then you would continue with getting master up-to-date as shown in the next paragraph.

If there are no conflicts, then master will have the new changes added in. If there are conflicts, this means that the same files have changes around similar lines of code that it cannot automatically merge. In this case git merge new_branch will report that there's conflict(s) to resolve. You 'resolve' them by editing the files (which will have both changes in them), selecting the changes you want, literally deleting the lines of the changes you don't want and then saving the file. The changes are marked with separators such as ======== and <<<<<<<<.

Once you have resolved any conflicts you will once again git add and git commit those changes to continue the merge (you'll get feedback from git during this process to guide you).

When the process doesn't work well you will find that git merge --abort is very handy to reset things.

Interactive rebasing and squashing / reordering / removing commits

If you have done work in a lot of small steps, e.g., you commit code as 'work-in-progress' every day, you may want to 'squash' those many small commits into a few larger commits. This can be particularly useful when you want to do code reviews with colleagues. You don't want to replay all the 'steps' you took (via commits), you want to just say here is the end effect (diff) of all of my changes for this work in one commit.

The key factor to evaluate when considering whether to do this is whether the multiple commits are against the same file or files more than once (better to squash commits in that case). This is done with the interactive rebasing tool. This tool lets you squash commits, delete commits, reword messages, etc. For example, git rebase -i HEAD~10 (note: that's a ~, not a -) brings up the following:

Be careful though and use this tool 'gingerly'. Do one squash/delete/reorder at a time, exit and save that commit, then reenter the tool. If commits are not contiguous you can reorder them (and then squash as needed). You can actually delete commits here too, but you really need to be sure of what you are doing when you do that!

Forks

There are two main approaches to collaboration in Git repositories. The first, detailed above, is directly via branches that people pull and push from/to. These collaborators have their SSH keys registered with the remote repository. This will let them push directly to that repository. The downside is that you have to maintain the list of users. The other approach - forking - allows anybody to 'fork' the repository, basically making a local copy in their own Git repository account. They can then make changes and when finished send a 'pull request' (really it's more of a 'push' from them and a 'pull' request for the actual repository maintainer) to get the code accepted.

This second method, using forks, does not require someone to maintain a list of users for the repository.

GitHub

GitHub (a remote repository) is a remote source that you normally push and pull those committed changes to if you have (or are added to) such a repository, so local and remote are actually quite distinct. Another way to think of a remote repository is that it is a .git directory structure that lives on a remote server.

When you 'fork' - in the GitHub web browser GUI you can click on this button Image of fork button - you create a copy ('clone') of the code in your GitHub account. It can be a little subtle first time you do it, so keep making sure you look at whose repository a code base is listed under - either the original owner or 'forked from' and you, e.g., like this:

Image of name of forked repository

Once you have the local copy, you can make changes as you wish (by pulling and pushing them to a local machine). When you are done then you submit a 'pull request' to the original repository owner/admin (sounds fancy but actually you just click on this: Image of pull request button ) and they 'pull' it in.

More common for a team working on code together is to 'clone' the repository (click on the 'copy' icon on the repository's main screen). Then, locally type git clone and paste. This will set you up locally and you can also push and pull to the (shared) GitHub location.

Clones

As indicated in the section on GitHub, a clone is a copy of a repository. When you have a remote repository you issue the git clone command against its URL and you then end up with a local copy, or clone, of the repository. This clone has everything, the files, the master branch, the other branches, all the existing commits, the whole shebang. It is this clone that you do your adds and commits against and then the remote repository itself is what you push those commits to. It's this local/remote concept that makes Git (and systems similar to it such as Mercurial) a DVCS (Distributed Version Control System) as opposed to the more traditional CVSs (Code Versioning Systems) such as SVN, PVCS, CVS, etc. where you commit directly to the remote repository.

Visualization

Visualization of the core concepts can be seen at
http://marklodato.github.com/visual-git-guide/index-en.html and
http://ndpsoftware.com/git-cheatsheet.html#loc=index

If you want a visual display of how the changes are working, you can't beat the visual tool gitg (gitx for macOS) with a GUI that I call 'the subway map' (esp. London Underground), great for showing who did what, how things changes, diverged and merged, etc.

You can also use it to add, commit and manage your changes!

Although gitg/gitx is fairly minimal, the number of GUI tools continues to expand. Many Mac users use brotherbard's fork of gitx and for Linux, a great option is smart-git with an intuitive yet powerful interface:

Note that even with a GUI tool, you will probably do a lot of commands at the command line.

For this, I have the following aliases in my ~/.bash_aliases file (which is called from my ~/.bashrc file for each terminal session):

# git
alias g='git status'
alias gcob='git checkout -b '
alias gcom='git checkout master'
alias gd='git diff'
alias gf='git fetch'
alias gfrm='git fetch; git reset --hard origin/master'
alias gg='git grep '
alias gits='alias | grep "^alias g.*git.*$"'
alias gl='git log'
alias gl1='git log --oneline'
alias glf='git log --name-status'
alias glp='git log -p'
alias gpull='git pull '
alias gpush='git push '

AND I have the following "git aliases" in my ~/.gitconfig file - why have these ?
So that branch completion (with the TAB key) works !

So these are:

[alias]
  co = checkout
  cob = checkout -b

Example usage: git co [branch] <- tab completion for branches will work.

GUI Learning Tool

You may find https://learngitbranching.js.org/ useful in learning some of the base concepts. Screen shot:
Video: https://youtu.be/23JqqcLPss0

Finally, 7 key lifesavers!

You make changes, add and commit them (but don't push) and then oh! you realize you are in master!

git reset [filename(s)]
git checkout -b [name_for_a_new_branch]
git add [file(s)]
git commit -m "A useful message"

Voila!  You've moved that 'master' commit to its own branch !

You mess up some files while working in a local branch and simply want to go back to what you had the last time you did a git pull:
```
git reset --hard origin/master  # You will need to be comfortable doing this!
```

You start making changes locally, you edit half a dozen files and then, oh crap, you're still in the master (or another) branch:

git checkout -b new_branch_name  # just create a new branch
git add .                      # add the changes files
git commit -m"your message"    # and commit them

You mess up one particular file in your current branch and want to basically 'reset' that file (lose changes) to how it was the the last time you pulled it from the remote repository:
```
git checkout your/directories/filename
```
This actually resets the file (like many Git commands it is not well named for what it is doing here).
You make some changes locally, you want to make sure you don't lose them while you do a git reset or rebase: I often make a manual copy of the entire project (cp -r ../my_project ~/) when I am not sure if I might mess up in Git or lose important changes.

You are rebasing but things gets messed up:

git rebase --abort # To abandon interactive rebase and merge issues

Add your Git branch to your PS1 prompt (see https://unix.stackexchange.com/a/127800/10043), e.g.

The branch is selenium_rspec_conversion.

How to check if mysql database exists

With this Script you can get Yes or No database exists, in case it does not exist it does not throw Exception.

SELECT 
    IF(EXISTS( SELECT 
                SCHEMA_NAME
            FROM
                INFORMATION_SCHEMA.SCHEMATA
            WHERE
                SCHEMA_NAME = 'DbName'),
        'Yes',
        'No')  as exist

Sorting HashMap by values

public static TreeMap<String, String> sortMap(HashMap<String, String> passedMap, String byParam) {
    if(byParam.trim().toLowerCase().equalsIgnoreCase("byValue")) {
        // Altering the (key, value) -> (value, key)
        HashMap<String, String> newMap =  new HashMap<String, String>();
        for (Map.Entry<String, String> entry : passedMap.entrySet()) {
            newMap.put(entry.getValue(), entry.getKey());
        }
        return new TreeMap<String, String>(newMap);
    }
    return new TreeMap<String, String>(passedMap);
}

How can I store the result of a system command in a Perl variable?

Using backtick or qx helps, thanks everybody for the answers. However, I found that if you use backtick or qx, the output contains trailing newline and I need to remove that. So I used chomp.

chomp($host = `hostname`);
chomp($domain = `domainname`);
$fqdn = $host.".".$domain;

More information here: http://irouble.blogspot.in/2011/04/perl-chomp-backticks.html

Convert String to int array in java

Saul's answer can be better implemented splitting the string like this:

string = string.replaceAll("[\\p{Z}\\s]+", "");
String[] array = string.substring(1, string.length() - 1).split(",");

Flask Error: "Method Not Allowed The method is not allowed for the requested URL"

I had a similar problem when I deployed my Flask app in the IIS. Apparently, IIS does not accept route that include an underline ("_"). When I removed the underline, problem was resolved.

.htaccess, order allow, deny, deny from all: confused?

This is a quite confusing way of using Apache configuration directives.

Technically, the first bit is equivalent to

Allow From All

This is because Order Deny,Allow makes the Deny directive evaluated before the Allow Directives. In this case, Deny and Allow conflict with each other, but Allow, being the last evaluated will match any user, and access will be granted.

Now, just to make things clear, this kind of configuration is BAD and should be avoided at all cost, because it borders undefined behaviour.

The Limit sections define which HTTP methods have access to the directory containing the .htaccess file.

Here, GET and POST methods are allowed access, and PUT and DELETE methods are denied access. Here's a link explaining what the various HTTP methods are: http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html

However, it's more than often useless to use these limitations as long as you don't have custom CGI scripts or Apache modules that directly handle the non-standard methods (PUT and DELETE), since by default, Apache does not handle them at all.

It must also be noted that a few other methods exist that can also be handled by Limit, namely CONNECT, OPTIONS, PATCH, PROPFIND, PROPPATCH, MKCOL, COPY, MOVE, LOCK, and UNLOCK.

The last bit is also most certainly useless, since any correctly configured Apache installation contains the following piece of configuration (for Apache 2.2 and earlier):

#
# The following lines prevent .htaccess and .htpasswd files from being 
# viewed by Web clients. 
#
<Files ~ "^\.ht">
    Order allow,deny
    Deny from all
    Satisfy all
</Files>

which forbids access to any file beginning by ".ht".

The equivalent Apache 2.4 configuration should look like:

<Files ~ "^\.ht">
    Require all denied
</Files>

How to print Unicode character in Python?

Just one more thing that hasn't been added yet

In Python 2, if you want to print a variable that has unicode and use .format(), then do this (make the base string that is being formatted a unicode string with u'':

>>> text = "Université de Montréal"
>>> print(u"This is unicode: {}".format(text))
>>> This is unicode: Université de Montréal

SQL Server 2008 Row Insert and Update timestamps

try

CREATE TABLE [dbo].[Names]
(
    [Name] [nvarchar](64) NOT NULL,
    [CreateTS] [smalldatetime] NOT NULL CONSTRAINT CreateTS_DF DEFAULT CURRENT_TIMESTAMP,
    [UpdateTS] [smalldatetime] NOT NULL

)

PS I think a smalldatetime is good enough. You may decide differently.

Can you not do this at the "moment of impact" ?

In Sql Server, this is common:

Update dbo.MyTable 
Set 

ColA = @SomeValue , 
UpdateDS = CURRENT_TIMESTAMP
Where...........

Sql Server has a "timestamp" datatype.

But it may not be what you think.

Here is a reference:

http://msdn.microsoft.com/en-us/library/ms182776(v=sql.90).aspx

Here is a little RowVersion (synonym for timestamp) example:

CREATE TABLE [dbo].[Names]
(
    [Name] [nvarchar](64) NOT NULL,
    RowVers rowversion ,
    [CreateTS] [datetime] NOT NULL CONSTRAINT CreateTS_DF DEFAULT CURRENT_TIMESTAMP,
    [UpdateTS] [datetime] NOT NULL

)


INSERT INTO dbo.Names (Name,UpdateTS)
select 'John' , CURRENT_TIMESTAMP
UNION ALL select 'Mary' , CURRENT_TIMESTAMP
UNION ALL select 'Paul' , CURRENT_TIMESTAMP

select *  ,  ConvertedRowVers = CONVERT(bigint,RowVers) from [dbo].[Names]

Update dbo.Names Set Name = Name

select *  ,  ConvertedRowVers = CONVERT(bigint,RowVers) from [dbo].[Names]

Maybe a complete working example:

DROP TABLE [dbo].[Names]
GO


CREATE TABLE [dbo].[Names]
(
    [Name] [nvarchar](64) NOT NULL,
    RowVers rowversion ,
    [CreateTS] [datetime] NOT NULL CONSTRAINT CreateTS_DF DEFAULT CURRENT_TIMESTAMP,
    [UpdateTS] [datetime] NOT NULL

)

GO

CREATE TRIGGER dbo.trgKeepUpdateDateInSync_ByeByeBye ON dbo.Names
AFTER INSERT, UPDATE
AS

BEGIN

Update dbo.Names Set UpdateTS = CURRENT_TIMESTAMP from dbo.Names myAlias , inserted triggerInsertedTable where 
triggerInsertedTable.Name = myAlias.Name

END


GO






INSERT INTO dbo.Names (Name,UpdateTS)
select 'John' , CURRENT_TIMESTAMP
UNION ALL select 'Mary' , CURRENT_TIMESTAMP
UNION ALL select 'Paul' , CURRENT_TIMESTAMP

select *  ,  ConvertedRowVers = CONVERT(bigint,RowVers) from [dbo].[Names]

Update dbo.Names Set Name = Name , UpdateTS = '03/03/2003' /* notice that even though I set it to 2003, the trigger takes over */

select *  ,  ConvertedRowVers = CONVERT(bigint,RowVers) from [dbo].[Names]

Matching on the "Name" value is probably not wise.

Try this more mainstream example with a SurrogateKey

DROP TABLE [dbo].[Names]
GO


CREATE TABLE [dbo].[Names]
(
    SurrogateKey int not null Primary Key Identity (1001,1),
    [Name] [nvarchar](64) NOT NULL,
    RowVers rowversion ,
    [CreateTS] [datetime] NOT NULL CONSTRAINT CreateTS_DF DEFAULT CURRENT_TIMESTAMP,
    [UpdateTS] [datetime] NOT NULL

)

GO

CREATE TRIGGER dbo.trgKeepUpdateDateInSync_ByeByeBye ON dbo.Names
AFTER UPDATE
AS

BEGIN

   UPDATE dbo.Names
    SET UpdateTS = CURRENT_TIMESTAMP
    From  dbo.Names myAlias
    WHERE exists ( select null from inserted triggerInsertedTable where myAlias.SurrogateKey = triggerInsertedTable.SurrogateKey)

END


GO






INSERT INTO dbo.Names (Name,UpdateTS)
select 'John' , CURRENT_TIMESTAMP
UNION ALL select 'Mary' , CURRENT_TIMESTAMP
UNION ALL select 'Paul' , CURRENT_TIMESTAMP

select *  ,  ConvertedRowVers = CONVERT(bigint,RowVers) from [dbo].[Names]

Update dbo.Names Set Name = Name , UpdateTS = '03/03/2003' /* notice that even though I set it to 2003, the trigger takes over */

select *  ,  ConvertedRowVers = CONVERT(bigint,RowVers) from [dbo].[Names]

How do I get the value of a textbox using jQuery?

Per Jquery docs

The .val() method is primarily used to get the values of form elements such as input, select and textarea. When called on an empty collection, it returns undefined.

In order to retrieve the value store in the text box with id txtEmail, you can use

$("#txtEmail").val()

Convert DateTime to long and also the other way around

Since you're using ToFileTime, you'll want to use FromFileTime to go the other way. But note:

Ordinarily, the FromFileTime method restores a DateTime value that was saved by the ToFileTime method. However, the two values may differ under the following conditions:

If the serialization and deserialization of the DateTime value occur in different time zones. For example, if a DateTime value with a time of 12:30 P.M. in the U.S. Eastern Time zone is serialized, and then deserialized in the U.S. Pacific Time zone, the original value of 12:30 P.M. is adjusted to 9:30 A.M. to reflect the difference between the two time zones.

If the DateTime value that is serialized represents an invalid time in the local time zone. In this case, the ToFileTime method adjusts the restored DateTime value so that it represents a valid time in the local time zone.

If you don't care which long representation of a DateTime is stored, you can use Ticks as others have suggested (Ticks is probably preferable, depending on your requirements, since the value returned by ToFileTime seems to be in the context of the Windows filesystem API).

What are libtool's .la file for?

It is a textual file that includes a description of the library.

It allows libtool to create platform-independent names.

For example, libfoo goes to:

Under Linux:

/lib/libfoo.so       # Symlink to shared object
/lib/libfoo.so.1     # Symlink to shared object
/lib/libfoo.so.1.0.1 # Shared object
/lib/libfoo.a        # Static library
/lib/libfoo.la       # 'libtool' library

Under Cygwin:

/lib/libfoo.dll.a    # Import library
/lib/libfoo.a        # Static library
/lib/libfoo.la       # libtool library
/bin/cygfoo_1.dll    # DLL

Under Windows MinGW:

/lib/libfoo.dll.a    # Import library
/lib/libfoo.a        # Static library
/lib/libfoo.la       # 'libtool' library
/bin/foo_1.dll       # DLL

So libfoo.la is the only file that is preserved between platforms by libtool allowing to understand what happens with:

Library dependencies
Actual file names
Library version and revision

Without depending on a specific platform implementation of libraries.

How to Convert JSON object to Custom C# object?

Since we all love one liners code

Newtonsoft is faster than java script serializer. ... this one depends on the Newtonsoft NuGet package, which is popular and better than the default serializer.

if we have class then use below.

Mycustomclassname oMycustomclassname = Newtonsoft.Json.JsonConvert.DeserializeObject<Mycustomclassname>(jsonString);

no class then use dynamic

var oMycustomclassname = Newtonsoft.Json.JsonConvert.DeserializeObject<dynamic>(jsonString);

Setting DIV width and height in JavaScript

The onclick attribute of a button takes a string of JavaScript, not an href like you provided. Just remove the "javascript:" part.

What is the difference between new/delete and malloc/free?

In C++ new/delete call the Constructor/Destructor accordingly.

malloc/free simply allocate memory from the heap. new/delete allocate memory as well.

How to trigger ngClick programmatically

Using plain old JavaScript worked for me:
document.querySelector('#elementName').click();

Fixed positioned div within a relative parent div

A simple thing you can do is position your fixed DIV relative to the rest of your page with % values.

Check out this jsfiddle here where the fixed DIV is a sidebar.

div#wrapper {
    margin: auto;
    width: 80%;
}

div#main {
    width: 60%;
}

div#sidebar {
    position: fixed;
    width: 30%;
    left: 60%;
}

And a brief picture below describing the layout above:

How to add a RequiredFieldValidator to DropDownList control?

InitialValue="0" : initial validation will fire when 0th index item is selected in ddl.

<asp:RequiredFieldValidator InitialValue="0" Display="Dynamic" CssClass="error" runat="server" ID="your_id" ValidationGroup="validationgroup" ControlToValidate="your_dropdownlist_id" />

How do I use a C# Class Library in a project?

There are necessary steps that are missing in the above answers to work for all levels of devs:

compile your class library project
the dll file will be available in the bin folder
in another project, right click ProjectName and select "Add" => "Existing Item"
Browser to the bin folder of the class library project and select the dll file (3 & 4 steps are important if you plan to ship your app to other machines)
as others mentioned, add reference to the dll file you "just" added to your project
as @Adam mentioned, just call the library name from anywhere in your program, you do not need a using statement

"Warning: iPhone apps should include an armv6 architecture" even with build config set

I had to be sure to change these settings in both the Target and Project settings on xCode 4.3.2 after doing that and setting it to build for both armv6 and armv7 everywhere I was able to submit my app.

For safe measure I also exited xCode between making the changes and doing a clean, build, archive cycle.

Get SELECT's value and text in jQuery

<select id="ddlViewBy">
    <option value="value">text</option>
</select>

JQuery

var txt = $("#ddlViewBy option:selected").text();
var val = $("#ddlViewBy option:selected").val();

JS Fiddle DEMO

How to print a dictionary line by line in Python?

You have a nested structure, so you need to format the nested dictionary too:

for key, car in cars.items():
    print(key)
    for attribute, value in car.items():
        print('{} : {}'.format(attribute, value))

This prints:

A
color : 2
speed : 70
B
color : 3
speed : 60

Multiple try codes in one block

You can use fuckit module.
Wrap your code in a function with @fuckit decorator:

@fuckit
def func():
    code a
    code b #if b fails, it should ignore, and go to c.
    code c #if c fails, go to d
    code d

How to change icon on Google map marker

var marker = new google.maps.Marker({
                position: new google.maps.LatLng(23.016427,72.571156),
                map: map,
                icon: 'images/map_marker_icon.png',
                title: 'Hi..!'
            });

apply local path on icon only

Sorting a tab delimited file

You need to put an actual tab character after the -t\ and to do that in a shell you hit ctrl-v and then the tab character. Most shells I've used support this mode of literal tab entry.

Beware, though, because copying and pasting from another place generally does not preserve tabs.

How to create a css rule for all elements except one class?

The negation pseudo-class seems to be what you are looking for.

table:not(.dojoxGrid) {color:red;}

It's not supported by = IE8 though.

AWS S3: how do I see how much disk space is using

The AWS console wont show you this but you can use Bucket Explorer or Cloudberry Explorer to get the total size of a bucket. Both have free versions available.

Note: these products still have to get the size of each individual object, so it could take a long time for buckets with lots of objects.

How to prevent gcc optimizing some statements in C?

Instead of using the new pragmas, you can also use __attribute__((optimize("O0"))) for your needs. This has the advantage of just applying to a single function and not all functions defined in the same file.

Usage example:

void __attribute__((optimize("O0"))) foo(unsigned char data) {
    // unmodifiable compiler code
}

How do I get the unix timestamp in C as an int?

Is just casting the value returned by time()

#include <stdio.h>
#include <time.h>

int main(void) {
    printf("Timestamp: %d\n",(int)time(NULL));
    return 0;
}

what you want?

$ gcc -Wall -Wextra -pedantic -std=c99 tstamp.c && ./a.out
Timestamp: 1343846167

To get microseconds since the epoch, from C11 on, the portable way is to use

int timespec_get(struct timespec *ts, int base)

Unfortunately, C11 is not yet available everywhere, so as of now, the closest to portable is using one of the POSIX functions clock_gettime or gettimeofday (marked obsolete in POSIX.1-2008, which recommends clock_gettime).

The code for both functions is nearly identical:

#include <stdio.h>
#include <time.h>
#include <stdint.h>
#include <inttypes.h>

int main(void) {

    struct timespec tms;

    /* The C11 way */
    /* if (! timespec_get(&tms, TIME_UTC)) { */

    /* POSIX.1-2008 way */
    if (clock_gettime(CLOCK_REALTIME,&tms)) {
        return -1;
    }
    /* seconds, multiplied with 1 million */
    int64_t micros = tms.tv_sec * 1000000;
    /* Add full microseconds */
    micros += tms.tv_nsec/1000;
    /* round up if necessary */
    if (tms.tv_nsec % 1000 >= 500) {
        ++micros;
    }
    printf("Microseconds: %"PRId64"\n",micros);
    return 0;
}

How to convert current date into string in java?

// GET DATE & TIME IN ANY FORMAT
import java.util.Calendar;
import java.text.SimpleDateFormat;
public static final String DATE_FORMAT_NOW = "yyyy-MM-dd HH:mm:ss";

public static String now() {
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT_NOW);
return sdf.format(cal.getTime());
}

Taken from here

How to resolve "Server Error in '/' Application" error?

I also got this error when I moved an entity framework edmx file into a "Models" sub-folder. This automatically changed the metadata in my connection string setting in my app.config.

So before the connection string changed... it looked something like this:

<connectionStrings>
    <add name="MyDbEntities" connectionString="metadata=res://*/MyDb.csdl|res://*/MyDb.ssdl|res://*/MyDb.msl; ...
</connectionStrings>

And after... it added the "Models" subfolder name (btw... it also added "Models" to the namespace for the EF classes generated) and the connection string now looks something like this:

<connectionStrings>
    <add name="MyDbEntities" connectionString="metadata=res://*/Models.MyDb.csdl|res://*/Models.MyDb.ssdl|res://*/Models.MyDb.msl; ...
</connectionStrings>

I have a website project that references this Entity Framework DB project. But its web.config did not have the updates to the connection string... and that's when I started getting the compilation error being discussed here.

To fix this error, I updated the connection string in the web.config in the website project to match the app.config in my EntityFramework project.

How to install Java SDK on CentOS?

@Sventeck, perfecto.

redhat docs are always a great source - good tutorial that explains how to install JDK via yum and then setting the path can be found here (have fun!) - Install OpenJDK and set $JAVA_HOME path

OpenJDK 6:

yum install java-1.6.0-openjdk-devel

OpenJDK 7:

yum install java-1.7.0-openjdk-devel

To list all available java openjdk-devel packages try:

yum list "java-*-openjdk-devel"

How to pass List from Controller to View in MVC 3

You can use the dynamic object ViewBag to pass data from Controllers to Views.

Add the following to your controller:

ViewBag.MyList = myList;

Then you can acces it from your view:

@ViewBag.MyList

// e.g.
@foreach (var item in ViewBag.MyList) { ... }

Parsing JSON with Unix tools

Update (2020)

My biggest issue with external tools (e.g. Python) was that you have to deal with package managers and dependencies to install them.

However, now that we have jq as a standalone, static tool that's easy to install cross-platform via Github Releases and Webi (webinstall.dev/jq), I'd recommend that:

Mac, Linux:

curl -sS https://webinstall.dev/jq | bash

Windows 10:

curl.exe -A MS https://webinstall.dev/jq | powershell

Original (2011)

TickTick is a JSON parser written in bash (<250 lines of code)

Here's the author's snippit from his article, Imagine a world where Bash supports JSON:

#!/bin/bash
. ticktick.sh

``  
  people = { 
    "Writers": [
      "Rod Serling",
      "Charles Beaumont",
      "Richard Matheson"
    ],  
    "Cast": {
      "Rod Serling": { "Episodes": 156 },
      "Martin Landau": { "Episodes": 2 },
      "William Shatner": { "Episodes": 2 } 
    }   
  }   
``  

function printDirectors() {
  echo "  The ``people.Directors.length()`` Directors are:"

  for director in ``people.Directors.items()``; do
    printf "    - %s\n" ${!director}
  done
}   

`` people.Directors = [ "John Brahm", "Douglas Heyes" ] ``
printDirectors

newDirector="Lamont Johnson"
`` people.Directors.push($newDirector) ``
printDirectors

echo "Shifted: "``people.Directors.shift()``
printDirectors

echo "Popped: "``people.Directors.pop()``
printDirectors

How to programmatically modify WCF app.config endpoint address setting?

see if you are placing the client section in the correct web.config file. SharePoint has around 6 to 7 config files. http://msdn.microsoft.com/en-us/library/office/ms460914(v=office.14).aspx (http://msdn.microsoft.com/en-us/library/office/ms460914%28v=office.14%29.aspx)

Post this you can simply try

ServiceClient client = new ServiceClient("ServiceSOAP");

List comprehension vs map

Image Source: Experfy

You can see for yourself which is better between - List Comprehension and the Map Function

(List Comprehension takes lesser time to process 1 million records when compared to a map function)

Hope it helps! Good Luck :)

JavaScript hard refresh of current page

Try to use:

location.reload(true);

When this method receives a true value as argument, it will cause the page to always be reloaded from the server. If it is false or not specified, the browser may reload the page from its cache.

More info:

The location object

How do I import the javax.servlet API in my Eclipse project?

Many of us develop in Eclipse via a Maven project. If so, you can include Tomcat dependencies in Maven via the tomcat-servlet-api and tomcat-jsp-api jars. One exists for each version of Tomcat. Usually adding these with scope provided to your POM is sufficient. This will keep your build more portable.

If you upgrade Tomcat in the future, you simply update the version of these jars as well.

Using BufferedReader.readLine() in a while loop properly

Thank you to SLaks and jpm for their help. It was a pretty simple error that I simply did not see.

As SLaks pointed out, br.readLine() was being called twice each loop which made the program only get half of the values. Here is the fixed code:

try{
        InputStream fis=new FileInputStream(targetsFile);
        BufferedReader br=new BufferedReader(new InputStreamReader(fis));
        String words[]=new String[5];
        String line=null;
        while((line=br.readLine())!=null){
            words=line.split(" ");
            int targetX=Integer.parseInt(words[0]);
            int targetY=Integer.parseInt(words[1]);
            int targetW=Integer.parseInt(words[2]);
            int targetH=Integer.parseInt(words[3]);
            int targetHits=Integer.parseInt(words[4]);
            Target a=new Target(targetX, targetY, targetW, targetH, targetHits);
            targets.add(a);
        }
        br.close();
    }
    catch(Exception e){
        System.err.println("Error: Target File Cannot Be Read");
    }

Thanks again! You guys are great!

java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet

i found that in the deployment assembly, there was the entry:

[persisted container] org.maven.ide.eclipse.maven2_classpath_container

i removed it, and added the maven dependencies entry, and it works fine now.

Counting the number of elements in array

Best practice of getting length is use length filter returns the number of items of a sequence or mapping, or the length of a string. For example: {{ notcount | length }}

But you can calculate count of elements in for loop. For example:

{% set count = 0 %}
{% for nc in notcount %}
    {% set count = count + 1 %}
{% endfor %}

{{ count }}

This solution helps if you want to calculate count of elements by condition, for example you have a property name inside object and you want to calculate count of objects with not empty names:

{% set countNotEmpty = 0 %}
{% for nc in notcount if nc.name %}
    {% set countNotEmpty = countNotEmpty + 1 %}
{% endfor %}

{{ countNotEmpty }}

Useful links:

How to implement a custom AlertDialog View

Custom AlertDialog

This full example includes passing data back to the Activity.

Create a custom layout

A layout with an EditText is used for this simple example, but you can replace it with anything you like.

custom_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:paddingLeft="20dp"
              android:paddingRight="20dp"
              android:layout_width="match_parent"
              android:layout_height="match_parent">

    <EditText
        android:id="@+id/editText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</LinearLayout>

Use the dialog in code

The key parts are

using setView to assign the custom layout to the AlertDialog.Builder
sending any data back to the activity when a dialog button is clicked.

This is the full code from the example project shown in the image above:

MainActivity.java

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void showAlertDialogButtonClicked(View view) {

        // create an alert builder
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Name");

        // set the custom layout
        final View customLayout = getLayoutInflater().inflate(R.layout.custom_layout, null);
        builder.setView(customLayout);

        // add a button
        builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                // send data from the AlertDialog to the Activity
                EditText editText = customLayout.findViewById(R.id.editText);
                sendDialogDataToActivity(editText.getText().toString());
            }
        });

        // create and show the alert dialog
        AlertDialog dialog = builder.create();
        dialog.show();
    }

    // do something with the data coming from the AlertDialog
    private void sendDialogDataToActivity(String data) {
        Toast.makeText(this, data, Toast.LENGTH_SHORT).show();
    }
}

Notes

If you find yourself using this in multiple places, then consider making a DialogFragment subclass as is described in the documentation.

(mysqldump.exe full path) -u (user name) -p (password) (database name) > (export database file full path)

Example

c:>d:\wamp\bin\mysql\mysql5.6.12\bin\mysqldump.exe -u root -p mydbname > d:\mydb.sql

where d:\wamp\bin\mysql\mysql5.6.12\bin\mysqldump.exe will be your actual mysqldump.exe path, mydbname is the name of database which you want to export and d:\mydb.sql is the path where you want to store the exported database.

How to test if a string contains one of the substrings in a list, in pandas?

One option is just to use the regex | character to try to match each of the substrings in the words in your Series s (still using str.contains).

You can construct the regex by joining the words in searchfor with |:

>>> searchfor = ['og', 'at']
>>> s[s.str.contains('|'.join(searchfor))]
0    cat
1    hat
2    dog
3    fog
dtype: object

As @AndyHayden noted in the comments below, take care if your substrings have special characters such as $ and ^ which you want to match literally. These characters have specific meanings in the context of regular expressions and will affect the matching.

You can make your list of substrings safer by escaping non-alphanumeric characters with re.escape:

>>> import re
>>> matches = ['$money', 'x^y']
>>> safe_matches = [re.escape(m) for m in matches]
>>> safe_matches
['\\$money', 'x\\^y']

The strings with in this new list will match each character literally when used with str.contains.

Does document.body.innerHTML = "" clear the web page?

document.body.innerHTML = ''; does clear the body, yeah. But it clears the innerHTML as it is at the moment the code is ran. As you run the code before the images and the script are actually in the body, it tries to clear the body, but there's nothing to clear.

If you want to clear the body, you have to run the code after the body has been filled with content. You can do this by either placing the <script> block as the last child of body, so everything is loaded before the code is ran, or you have to use some way to listen to the dom:loaded event.

Get HTML code using JavaScript with a URL

Use jQuery:

$.ajax({ url: 'your-url', success: function(data) { alert(data); } });

This data is your HTML.

Without jQuery (just JavaScript):

function makeHttpObject() {
  try {return new XMLHttpRequest();}
  catch (error) {}
  try {return new ActiveXObject("Msxml2.XMLHTTP");}
  catch (error) {}
  try {return new ActiveXObject("Microsoft.XMLHTTP");}
  catch (error) {}

  throw new Error("Could not create HTTP request object.");
}

var request = makeHttpObject();
request.open("GET", "your_url", true);
request.send(null);
request.onreadystatechange = function() {
  if (request.readyState == 4)
    alert(request.responseText);
};

What is the most effective way to get the index of an iterator of an std::vector?

I'd use the - variant for std::vector only - it's pretty clear what is meant, and the simplicity of the operation (which isn't more than a pointer subtraction) is expressed by the syntax (distance, on the other side, sounds like pythagoras on the first reading, doesn't it?). As UncleBen points out, - also acts as a static assertion in case vector is accidentially changed to list.

Also I think it is much more common - have no numbers to prove it, though. Master argument: it - vec.begin() is shorter in source code - less typing work, less space consumed. As it's clear that the right answer to your question boils down to be a matter of taste, this can also be a valid argument.

SQL Error: 0, SQLState: 08S01 Communications link failure

Could be due to the TCP protocol turned off.

How to check/enable: https://dba.stackexchange.com/questions/11377/cannot-connect-to-ms-sql-2008-r2-by-dbvisualizer-native-sspi-library-not-loade/144097#144097

Change DataGrid cell colour based on values

Based on the answer by 'Cassio Borghi'. With this method, there is no need to change the XAML at all.

        DataGridTextColumn colNameStatus2 = new DataGridTextColumn();
        colNameStatus2.Header = "Status";
        colNameStatus2.MinWidth = 100;
        colNameStatus2.Binding = new Binding("Status");
        grdComputer_Servives.Columns.Add(colNameStatus2);

        Style style = new Style(typeof(TextBlock));
        Trigger running = new Trigger() { Property = TextBlock.TextProperty, Value = "Running" };
        Trigger stopped = new Trigger() { Property = TextBlock.TextProperty, Value = "Stopped" };

        stopped.Setters.Add(new Setter() { Property = TextBlock.BackgroundProperty, Value = Brushes.Blue });
        running.Setters.Add(new Setter() { Property = TextBlock.BackgroundProperty, Value = Brushes.Green });

        style.Triggers.Add(running);
        style.Triggers.Add(stopped);

        colNameStatus2.ElementStyle = style;

        foreach (var Service in computerResult)
        {
            var RowName = Service;  
            grdComputer_Servives.Items.Add(RowName);
        }

pg_config executable not found

On MacOS, the simplest solution will be to symlink the correct binary, that is under the Postgres package.

sudo ln -s /Applications/Postgres.app/Contents/Versions/latest/bin/pg_config /usr/local/bin/pg_config

This is fairly harmless, and all the applications will be able to use it system wide, if required.

How in node to split string by newline ('\n')?

a = a.split("\n");

Note that splitting returns the new array, rather than just assigning it to the original string. You need to explicitly store it in a variable.

Continuous CSS rotation animation on hover, animated back to 0deg on hover out

<script>
var deg = 0

function rotate(id)
{
    deg = deg+45;
    var txt = 'rotate('+deg+'deg)';
    $('#'+id).css('-webkit-transform',txt);
}
</script>

What I do is something very easy... declare a global variable at the start... and then increment the variable however much I like, and use .css of jquery to increment.

Enable & Disable a Div and its elements in Javascript

If you want to disable all the div's controls, you can try adding a transparent div on the div to disable, you gonna make it unclickable, also use fadeTo to create a disable appearance.

try this.

$('#DisableDiv').fadeTo('slow',.6);
$('#DisableDiv').append('<div style="position: absolute;top:0;left:0;width: 100%;height:100%;z-index:2;opacity:0.4;filter: alpha(opacity = 50)"></div>');

How do I disable a href link in JavaScript?

Try this when you dont want user to redirect on click

<a href="javascript: void(0)">I am a useless link</a>

How to use Git and Dropbox together?

Now in 2014, I have been using Git and Dropbox for about one year and a half without problem. Some points though:

All my machines using Dropbox are on Windows, different versions (7 to 8) + 1 mac.
I do not share the repository with someone else, so I am the only one to modify it.
git push pushes to a remote repository, so that if it ever gets corrupted, I can easily recover it.
I had to create aliases in C:\Users with mklink /D link target because some libraries were pointed to absolute locations.

Remove a prefix from a string

What about this (a bit late):

def remove_prefix(s, prefix):
    return s[len(prefix):] if s.startswith(prefix) else s

How to inject Javascript in WebBrowser control?

this is a solution using mshtml

IHTMLDocument2 doc = new HTMLDocumentClass();
doc.write(new object[] { File.ReadAllText(filePath) });
doc.close();

IHTMLElement head = (IHTMLElement)((IHTMLElementCollection)doc.all.tags("head")).item(null, 0);
IHTMLScriptElement scriptObject = (IHTMLScriptElement)doc.createElement("script");
scriptObject.type = @"text/javascript";
scriptObject.text = @"function btn1_OnClick(str){
    alert('you clicked' + str);
}";
((HTMLHeadElementClass)head).appendChild((IHTMLDOMNode)scriptObject);

Why ModelState.IsValid always return false in mvc

"ModelState.IsValid" tells you that the model is consumed by the view (i.e. PaymentAdviceEntity) is satisfy all types of validation or not specified in the model properties by DataAnotation.

In this code the view does not bind any model properties. So if you put any DataAnotations or validation in model (i.e. PaymentAdviceEntity). then the validations are not satisfy. say if any properties in model is Name which makes required in model.Then the value of the property remains blank after post.So the model is not valid (i.e. ModelState.IsValid returns false). You need to remove the model level validations.

Replace text in HTML page with jQuery

Like others mentioned in this thread, replacing the entire body HTML is a bad idea because it reinserts the entire DOM and can potentially break any other javascript that was acting on those elements.

Instead, replace just the text on your page and not the DOM elements themselves using jQuery filter:

  $('body :not(script)').contents().filter(function() {
    return this.nodeType === 3;
  }).replaceWith(function() {
      return this.nodeValue.replace('-9o0-9909','The new string');
  });

this.nodeType is the type of node we are looking to replace the contents of. nodeType 3 is text. See the full list here.

How to download a file from server using SSH?

How to get an ASP.NET MVC Ajax response to redirect to new page instead of inserting view into UpdateTargetId?

You can use JavascriptResult to achieve this.

To redirect:

return JavaScript("window.location = 'http://www.google.co.uk'");

To reload the current page:

return JavaScript("location.reload(true)");

Seems the simplest option.

"The page has expired due to inactivity" - Laravel 5.5

I change permission to storage and error was gone. It seemed lack of permission was the issue.

sudo chmod -R 775 storage/

form action with javascript

A form action set to a JavaScript function is not widely supported, I'm surprised it works in FireFox.

The best is to just set form action to your PHP script; if you need to do anything before submission you can just add to onsubmit

Edit turned out you didn't need any extra function, just a small change here:

function validateFormOnSubmit(theForm) {
    var reason = "";
    reason += validateName(theForm.name);
    reason += validatePhone(theForm.phone);
    reason += validateEmail(theForm.emaile);

    if (reason != "") {
        alert("Some fields need correction:\n" + reason);
    } else {
        simpleCart.checkout();
    }
    return false;
}

Then in your form:

<form action="#" onsubmit="return validateFormOnSubmit(this);">

Wait until boolean value changes it state

You need a mechanism which avoids busy-waiting. The old wait/notify mechanism is fraught with pitfalls so prefer something from the java.util.concurrent library, for example the CountDownLatch:

public final CountDownLatch latch = new CountDownLatch(1);

public void run () {
  latch.await();
  ...
}

And at the other side call

yourRunnableObj.latch.countDown();

However, starting a thread to do nothing but wait until it is needed is still not the best way to go. You could also employ an ExecutorService to which you submit as a task the work which must be done when the condition is met.

Replace string in text file using PHP

Does this work:

$msgid = $_GET['msgid'];

$oldMessage = '';

$deletedFormat = '';

//read the entire string
$str=file_get_contents('msghistory.txt');

//replace something in the file string - this is a VERY simple example
$str=str_replace($oldMessage, $deletedFormat,$str);

//write the entire string
file_put_contents('msghistory.txt', $str);

Comparing two hashmaps for equal values and same key sets?

Simply use :

mapA.equals(mapB);

Compares the specified object with this map for equality. Returns true if the given object is also a map and the two maps represent the same mappings

get UTC timestamp in python with datetime

Also note the calendar.timegm() function as described by this blog entry:

import calendar
calendar.timegm(utc_timetuple)

The output should agree with the solution of vaab.

How to turn off INFO logging in Spark?

Edit your conf/log4j.properties file and Change the following line:

   log4j.rootCategory=INFO, console

    log4j.rootCategory=ERROR, console

Another approach would be to :

Fireup spark-shell and type in the following:

import org.apache.log4j.Logger
import org.apache.log4j.Level

Logger.getLogger("org").setLevel(Level.OFF)
Logger.getLogger("akka").setLevel(Level.OFF)

You won't see any logs after that.

How exactly does the android:onClick XML attribute differ from setOnClickListener?

Check if you forgot to put the method public!

Can I safely delete contents of Xcode Derived data folder?

The content of 'Derived Data' is generated during Build-time. You can delete it safely. Follow below steps for deleting 'Derived Data' :

Select Xcode -> Preferences..

Step 1

This will open pop-up window. Select 'Locations' tab. In Locations sub-tab you can see 'Derived Data' Click on arrow icon next to path.

Step 2

This will open-up folder containing 'Derived Data' Right click and Delete folder.

Step 3

How to Calculate Jump Target Address and Branch Target Address?

Usually you don't have to worry about calculating them as your assembler (or linker) will take of getting the calculations right. Let's say you have a small function:


func:
  slti $t0, $a0, 2
  beq $t0, $zero, cont
  ori $v0, $zero, 1
  jr $ra
cont:
  ...
  jal func
  ...

When translating the above code into a binary stream of instructions the assembler (or linker if you first assembled into an object file) it will be determined where in memory the function will reside (let's ignore position independent code for now). Where in memory it will reside is usually specified in the ABI or given to you if you're using a simulator (like SPIM which loads the code at 0x400000 - note the link also contains a good explanation of the process).

Assuming we're talking about the SPIM case and our function is first in memory, the slti instruction will reside at 0x400000, the beq at 0x400004 and so on. Now we're almost there! For the beq instruction the branch target address is that of cont (0x400010) looking at a MIPS instruction reference we see that it is encoded as a 16-bit signed immediate relative to the next instruction (divided by 4 as all instructions must reside on a 4-byte aligned address anyway).

That is:

Current address of instruction + 4 = 0x400004 + 4 = 0x400008
Branch target = 0x400010
Difference = 0x400010 - 0x400008 = 0x8
To encode = Difference / 4 = 0x8 / 4 = 0x2 = 0b10

Encoding of beq $t0, $zero, cont

0001 00ss ssst tttt iiii iiii iiii iiii
---------------------------------------
0001 0001 0000 0000 0000 0000 0000 0010

As you can see you can branch to within -0x1fffc .. 0x20000 bytes. If for some reason, you need to jump further you can use a trampoline (an unconditional jump to the real target placed placed within the given limit).

Jump target addresses are, unlike branch target addresses, encoded using the absolute address (again divided by 4). Since the instruction encoding uses 6 bits for the opcode, this only leaves 26 bits for the address (effectively 28 given that the 2 last bits will be 0) therefore the 4 bits most significant bits of the PC register are used when forming the address (won't matter unless you intend to jump across 256 MB boundaries).

Returning to the above example the encoding for jal func is:

Destination address = absolute address of func = 0x400000
Divided by 4 = 0x400000 / 4 = 0x100000
Lower 26 bits = 0x100000 & 0x03ffffff = 0x100000 = 0b100000000000000000000

0000 11ii iiii iiii iiii iiii iiii iiii
---------------------------------------
0000 1100 0001 0000 0000 0000 0000 0000

You can quickly verify this, and play around with different instructions, using this online MIPS assembler i ran across (note it doesn't support all opcodes, for example slti, so I just changed that to slt here):

00400000: <func>    ; <input:0> func:
00400000: 0000002a  ; <input:1> slt $t0, $a0, 2
00400004: 11000002  ; <input:2> beq $t0, $zero, cont
00400008: 34020001  ; <input:3> ori $v0, $zero, 1
0040000c: 03e00008  ; <input:4> jr $ra
00400010: <cont>    ; <input:5> cont:
00400010: 0c100000  ; <input:7> jal func

How to concatenate strings in a Windows batch file?

Based on Rubens' solution, you need to enable Delayed Expansion of env variables (type "help setlocal" or "help cmd") so that the var is correctly evaluated in the loop:

@echo off
setlocal enabledelayedexpansion
set myvar=the list: 
for /r %%i In (*.sql) DO set myvar=!myvar! %%i,
echo %myvar%

Also consider the following restriction (MSDN):

The maximum individual environment variable size is 8192bytes.

Letter Count on a string

A simple way is as follows:

def count_letters(word, char):
    return word.count(char)

Or, there's another way count each element directly:

from collections import Counter
Counter('banana')

Of course, you can specify one element, e.g.

Counter('banana')['a']

How to return a file using Web API?

Better to return HttpResponseMessage with StreamContent inside of it.

Here is example:

public HttpResponseMessage GetFile(string id)
{
    if (String.IsNullOrEmpty(id))
        return Request.CreateResponse(HttpStatusCode.BadRequest);

    string fileName;
    string localFilePath;
    int fileSize;

    localFilePath = getFileFromID(id, out fileName, out fileSize);

    HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
    response.Content = new StreamContent(new FileStream(localFilePath, FileMode.Open, FileAccess.Read));
    response.Content.Headers.ContentDisposition = new System.Net.Http.Headers.ContentDispositionHeaderValue("attachment");
    response.Content.Headers.ContentDisposition.FileName = fileName;
    response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/pdf");

    return response;
}

UPD from comment by patridge: Should anyone else get here looking to send out a response from a byte array instead of an actual file, you're going to want to use new ByteArrayContent(someData) instead of StreamContent (see here).

How to select date from datetime column?

Here are all formats

Say this is the column that contains the datetime value, table data.

+--------------------+
| date_created       |
+--------------------+
| 2018-06-02 15:50:30|
+--------------------+

mysql> select DATE(date_created) from data;
+--------------------+
| DATE(date_created) |
+--------------------+
| 2018-06-02         |
+--------------------+

mysql> select YEAR(date_created) from data;
+--------------------+
| YEAR(date_created) |
+--------------------+
|               2018 |
+--------------------+

mysql> select MONTH(date_created) from data;
+---------------------+
| MONTH(date_created) |
+---------------------+
|                   6 |
+---------------------+

mysql> select DAY(date_created) from data;
+-------------------+
| DAY(date_created) |
+-------------------+
|                 2 |
+-------------------+

mysql> select HOUR(date_created) from data;
+--------------------+
| HOUR(date_created) |
+--------------------+
|                 15 |
+--------------------+

mysql> select MINUTE(date_created) from data;
+----------------------+
| MINUTE(date_created) |
+----------------------+
|                   50 |
+----------------------+

mysql> select SECOND(date_created) from data;
+----------------------+
| SECOND(date_created) |
+----------------------+
|                   31 |
+----------------------+

IE9 jQuery AJAX with CORS returns "Access is denied"

I was testing a CORS web service on my dev machine and was getting the "Access is denied" error message in only IE. Firefox and Chrome worked fine. It turns out this was caused by my use of localhost in the ajax call! So my browser URL was something like:

http://my_computer.my_domain.local/CORS_Service/test.html

and my ajax call inside of test.html was something like:

//fails in IE 
$.ajax({
  url: "http://localhost/CORS_Service/api/Controller",
  ...
});

Everything worked once I changed the ajax call to use my computer IP instead of localhost.

//Works in IE
$.ajax({
  url: "http://192.168.0.1/CORS_Service/api/Controller",
  ...
});

The IE dev tools window "Network" tab also shows CORS Preflight OPTIONS request followed by the XMLHttpRequest GET, which is exactly what I expected to see.

How to resize Image in Android?

public Bitmap resizeBitmap(String photoPath, int targetW, int targetH) {
    BitmapFactory.Options bmOptions = new BitmapFactory.Options();
    bmOptions.inJustDecodeBounds = true;
    BitmapFactory.decodeFile(photoPath, bmOptions);
    int photoW = bmOptions.outWidth;
    int photoH = bmOptions.outHeight;

    int scaleFactor = 1;
    if ((targetW > 0) || (targetH > 0)) {
            scaleFactor = Math.min(photoW/targetW, photoH/targetH);        
    }

    bmOptions.inJustDecodeBounds = false;
    bmOptions.inSampleSize = scaleFactor;
    bmOptions.inPurgeable = true; //Deprecated API 21

    return BitmapFactory.decodeFile(photoPath, bmOptions);            
}

Possible reasons for timeout when trying to access EC2 instance

I had the same problem and I solved it by adding a rule to the security Groups

Inbound SSH 0.0.0.0/0

Or you can add your IP address only

Write HTML to string

You can use ASP.NET to generate your HTML outside the context of web pages. Here's an article that shows how it can be done.

ssh : Permission denied (publickey,gssapi-with-mic)

As everybody else has already said you need to edit /etc/ssh/sshd_config and change PasswordAuthentication no to PasswordAuthentication yes

I ran into this problem setting up a Vagrant box - so therefore it makes sense to script this and do it automatically in a shell provisioner:

sudo sed -i 's/PasswordAuthentication no/PasswordAuthentication yes/g' /etc/ssh/sshd_config;

sudo systemctl restart sshd;

How to check the version before installing a package using apt-get?

Also, according to the man page:

apt-cache showpkg <package_name>

can also be used to:

...display information about the packages listed on the command line. Remaining arguments are package names. The available versions and reverse dependencies of each package listed are listed, as well as forward dependencies for each version. Forward (normal) dependencies are those packages upon which the package in question depends; reverse dependencies are those packages that depend upon the package in question. Thus, forward dependencies must be satisfied for a package, but reverse dependencies need not be.

Ex:

apt-cache policy conky

conky:
  Installed: (none)
  Candidate: 1.10.3-1
  Version table:
     1.10.3-1 500
        500 http://us.archive.ubuntu.com/ubuntu yakkety/universe amd64 Packages
        500 http://us.archive.ubuntu.com/ubuntu yakkety/universe i386 Packages

Visualizing branch topology in Git

I have 3 aliases (and 4 alias-aliases for quick usage) that I normally throw in my ~/.gitconfig file:

[alias]
    lg = lg1
    lg1 = lg1-specific --all
    lg2 = lg2-specific --all
    lg3 = lg3-specific --all

    lg1-specific = log --graph --abbrev-commit --decorate --format=format:'%C(bold blue)%h%C(reset) - %C(bold green)(%ar)%C(reset) %C(white)%s%C(reset) %C(dim white)- %an%C(reset)%C(auto)%d%C(reset)'
    lg2-specific = log --graph --abbrev-commit --decorate --format=format:'%C(bold blue)%h%C(reset) - %C(bold cyan)%aD%C(reset) %C(bold green)(%ar)%C(reset)%C(auto)%d%C(reset)%n''          %C(white)%s%C(reset) %C(dim white)- %an%C(reset)'
    lg3-specific = log --graph --abbrev-commit --decorate --format=format:'%C(bold blue)%h%C(reset) - %C(bold cyan)%aD%C(reset) %C(bold green)(%ar)%C(reset) %C(bold cyan)(committed: %cD)%C(reset) %C(auto)%d%C(reset)%n''          %C(white)%s%C(reset)%n''          %C(dim white)- %an <%ae> %C(reset) %C(dim white)(committer: %cn <%ce>)%C(reset)'

git lg/git lg1 looks like this:

git lg1

git lg2 looks like this:

git lg2

and git lg3 looks like this:

git lg3

It should be noted that this isn't meant as a end-all-be-all solution— it's a template for you to change, add to and fix up to your liking. If you want to use these, my recommendation is to:

Add them to your .gitconfig,
Customize to your liking (different color choices, different line arrangements for the 2- and 3-line versions, etc.),
And then save a copy to a Gist or other code snippet tool so you can copy & paste it into .gitconfigs in the future (or alternatively version control your dotfiles, of course).

_{Note: Answer copied from and improved upon the answer at stackoverflow.com/questions/1057564/pretty-git-branch-graphs since it's far more appropriate here than it was there. Left the copy on the other question for historical reasons— it's closed now, and the answer's referenced by a bunch of other answers.}

RSA: Get exponent and modulus given a public key

It depends on the tools you can use. I doubt there is a JavaScript too that could do it directly within the browser. It also depends if it's a one-off (always the same key) or whether you need to script it.

Command-line / OpenSSL

If you want to use something like OpenSSL on a unix command line, you can do something as follows. I'm assuming you public.key file contains something like this:

Then, the commands would be:

PUBKEY=`grep -v -- ----- public.key | tr -d '\n'`

Then, you can look into the ASN.1 structure:

echo $PUBKEY | base64 -d | openssl asn1parse -inform DER -i

This should give you something like this:

    0:d=0  hl=4 l= 290 cons: SEQUENCE          
    4:d=1  hl=2 l=  13 cons:  SEQUENCE          
    6:d=2  hl=2 l=   9 prim:   OBJECT            :rsaEncryption
   17:d=2  hl=2 l=   0 prim:   NULL              
   19:d=1  hl=4 l= 271 prim:  BIT STRING

The modulus and public exponent are in the last BIT STRING, offset 19, so use -strparse:

 echo $PUBKEY | base64 -d | openssl asn1parse -inform DER -i -strparse 19

This will give you the modulus and the public exponent, in hexadecimal (the two INTEGERs):

    0:d=0  hl=4 l= 266 cons: SEQUENCE          
    4:d=1  hl=4 l= 257 prim:  INTEGER           :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
  265:d=1  hl=2 l=   3 prim:  INTEGER           :010001

That's probably fine if it's always the same key, but this is probably not very convenient to put in a script.

Alternatively (and this might be easier to put into a script),

openssl rsa -pubin -inform PEM -text -noout < public.key

will return this:

Modulus (2048 bit):
    00:98:10:23:16:ff:b6:f4:26:a2:42:a6:19:23:0e:
    0f:27:4a:b9:43:3d:a0:4b:b9:1b:1a:57:92:dd:a8:
    bc:5d:b8:6e:e6:7f:0f:2e:89:a5:77:16:d1:cf:44:
    69:74:2b:b1:a9:dd:72:bd:a8:9c:aa:90:ca:7b:f4:
    d3:d3:db:11:98:bd:61:f1:2c:77:41:ad:c4:42:6a:
    88:d1:37:04:12:a9:36:ec:09:34:0d:31:71:b9:5a:
    ea:ed:ce:61:1c:1e:5f:6c:9e:28:ee:21:2a:e4:c6:
    1f:75:29:78:a5:96:b1:53:17:4d:bf:88:d1:12:5c:
    a6:75:aa:7c:fe:23:a8:dd:25:35:46:c6:8a:eb:2e:
    e4:a3:1d:7f:b6:6d:9c:7d:66:59:84:c9:51:15:82:
    67:a6:85:e9:c8:d6:2b:a7:e6:28:08:d2:b1:99:92:
    67:32:c4:ba:f7:c9:1a:16:30:e5:cb:39:cb:96:28:
    70:32:ba:18:d2:64:2f:74:3e:dd:09:e0:68:56:57:
    cf:50:63:c0:95:a9:b0:5b:2a:ad:21:4f:bd:e7:15:
    64:4a:9d:e4:c5:c3:5c:35:bf:e6:78:f4:8a:40:83:
    da:7d:0d:6c:02:60:4a:3f:0c:9c:03:fd:48:e6:72:
    f3:0d:5b:90:6b:de:59:58:c9:f4:26:4a:61:b4:52:
    21:1d
Exponent: 65537 (0x10001)

Java

It depends on the input format. If it's an X.509 certificate in a keystore, use (RSAPublicKey)cert.getPublicKey(): this object has two getters for the modulus and the exponent.

If it's in the format as above, you might want to use BouncyCastle and its PEMReader to read it. I haven't tried the following code, but this would look more or less like this:

PEMReader pemReader = new PEMReader(new FileReader("file.pem"));
Object obj = pemReader.readObject();
pemReader.close();
if (obj instanceof X509Certificate) {
   // Just in case your file contains in fact an X.509 certificate,
   // useless otherwise.
   obj = ((X509Certificate)obj).getPublicKey();
}
if (obj instanceof RSAPublicKey) {
   // ... use the getters to get the BigIntegers.
}

(You can use BouncyCastle similarly in C# too.)

How to remove an element from the flow?

None?

I mean, other than removing it from the layout entirely with display: none, I'm pretty sure that's it.

Are you facing a particular situation in which position: absolute is not a viable solution?

Android Studio - Gradle sync project failed

Using an outdated gradle version may also result to fail in synchronization. Download latest version from https://gradle.org/releases/ and download the "complete" latest version. Now replace it with the outdated version which is located C:\Program Files\Android\Android Studio\gradle. Go to settings(ctrl+alt+s) ,go to gradle and add the the new gradle directory in "use local gradle distribution" "Gradle home:C:\Program Files\Android\Android Studio\gradle\gradle4.4.1 ."

It Worked for me. Hope u understand.

Face recognition Library

pam-face-authentication a PAM Module for Face Authentication: but it would require some work to get what you want. A quick test showed, that the recognition rate are not as good as those of VeriLook from NeuroTechnology.

Malic is another open source face recognition software, which uses Gabor Wavelet descriptors. But the last update to the source is 3 years old.

From the website: "Malic is an opensource face recognition software which uses gabor wavelet. It is realtime face recognition system that based on Malib and CSU Face Identification Evaluation System (csuFaceIdEval).Uses Malib library for realtime image processing and some of csuFaceIdEval for face recognition."

Further this could be of interest:

gaborboosting: A scientific program applied on Face Recognition with Gabor Wavelet and AdaBoost Algorithm

Feature Extraction Library - FELib refers to "Face Annotation by Transductive Kernel Fisher Discriminant,"

Appending to 2D lists in Python

You haven't created three different empty lists. You've created one empty list, and then created a new list with three references to that same empty list. To fix the problem use this code instead:

listy = [[] for i in range(3)]

Running your example code now gives the result you probably expected:

>>> listy = [[] for i in range(3)]
>>> listy[1] = [1,2]
>>> listy
[[], [1, 2], []]
>>> listy[1].append(3)
>>> listy
[[], [1, 2, 3], []]
>>> listy[2].append(1)
>>> listy
[[], [1, 2, 3], [1]]

Checking images for similarity with OpenCV

A little bit off topic but useful is the pythonic numpy approach. Its robust and fast but just does compare pixels and not the objects or data the picture contains (and it requires images of same size and shape):

A very simple and fast approach to do this without openCV and any library for computer vision is to norm the picture arrays by

import numpy as np
picture1 = np.random.rand(100,100)
picture2 = np.random.rand(100,100)
picture1_norm = picture1/np.sqrt(np.sum(picture1**2))
picture2_norm = picture2/np.sqrt(np.sum(picture2**2))

After defining both normed pictures (or matrices) you can just sum over the multiplication of the pictures you like to compare:

1) If you compare similar pictures the sum will return 1:

In[1]: np.sum(picture1_norm**2)
Out[1]: 1.0

2) If they aren't similar, you'll get a value between 0 and 1 (a percentage if you multiply by 100):

In[2]: np.sum(picture2_norm*picture1_norm)
Out[2]: 0.75389941124629822

Please notice that if you have colored pictures you have to do this in all 3 dimensions or just compare a greyscaled version. I often have to compare huge amounts of pictures with arbitrary content and that's a really fast way to do so.

Laravel Soft Delete posts

Here is the details from laravel.com

http://laravel.com/docs/eloquent#soft-deleting

When soft deleting a model, it is not actually removed from your database. Instead, a deleted_at timestamp is set on the record. To enable soft deletes for a model, specify the softDelete property on the model:

class User extends Eloquent {

    protected $softDelete = true;

}

To add a deleted_at column to your table, you may use the softDeletes method from a migration:

$table->softDeletes();

Now, when you call the delete method on the model, the deleted_at column will be set to the current timestamp. When querying a model that uses soft deletes, the "deleted" models will not be included in query results.

React proptype array with shape

If I am to define the same proptypes for a particular shape multiple times, I like abstract it out to a proptypes file so that if the shape of the object changes, I only have to change the code in one place. It helps dry up the codebase a bit.

Example:

// Inside my proptypes.js file
import PT from 'prop-types';

export const product = {
  id: PT.number.isRequired,
  title: PT.string.isRequired,
  sku: PT.string.isRequired,
  description: PT.string.isRequired,
};


// Inside my component file
import PT from 'prop-types';
import { product } from './proptypes;


List.propTypes = {
  productList: PT.arrayOf(product)
}

How to use Collections.sort() in Java?

Create a comparator which accepts the compare mode in its constructor and pass different modes for different scenarios based on your requirement

public class RecipeComparator implements Comparator<Recipe> {

public static final int COMPARE_BY_ID = 0;
public static final int COMPARE_BY_NAME = 1;

private int compare_mode = COMPARE_BY_NAME;

public RecipeComparator() {
}

public RecipeComparator(int compare_mode) {
    this.compare_mode = compare_mode;
}

@Override
public int compare(Recipe o1, Recipe o2) {
    switch (compare_mode) {
    case COMPARE_BY_ID:
        return o1.getId().compareTo(o2.getId());
    default:
        return o1.getInputRecipeName().compareTo(o2.getInputRecipeName());
    }
}

}

Actually for numbers you need to handle them separately check below

public static void main(String[] args) {
    String string1 = "1";
    String string2 = "2";
    String string11 = "11";

    System.out.println(string1.compareTo(string2)); 
    System.out.println(string2.compareTo(string11));// expected -1 returns 1
   // to compare numbers you actually need to do something like this

    int number2 = Integer.valueOf(string1);
    int number11 = Integer.valueOf(string11);

    int compareTo = number2 > number11 ? 1 : (number2 < number11 ? -1 : 0) ;
    System.out.println(compareTo);// prints -1
}

What XML parser should I use in C++?

The OutputPath property is not set for this project

The error shown in visual studio for the project (Let's say A) does not have issues. When I looked at the output window for the build line by line for each project, I saw that it was complaining about another project (B) that had been referred as assembly in project A. Project B added into the solution. But it had not been referred in the project A as project reference instead as assembly reference from different location. That location contains the assembly which compiled for Platform AnyCpu. Then I removed the assembly reference from the project A and added project B as a reference. It started compiling. Not sure though how this fix worked.

Can I limit the length of an array in JavaScript?

You need to actually use the shortened array after you remove items from it. You are ignoring the shortened array.

You convert the cookie into an array. You reduce the length of the array and then you never use that shortened array. Instead, you just use the old cookie (the unshortened one).

You should convert the shortened array back to a string with .join(",") and then use it for the new cookie instead of using old_cookie which is not shortened.

You may also not be using .splice() correctly, but I don't know exactly what your objective is for shortening the array. You can read about the exact function of .splice() here.

What is the syntax meaning of RAISERROR()

according to MSDN

RAISERROR ( { msg_id | msg_str | @local_variable }
    { ,severity ,state }
    [ ,argument [ ,...n ] ] )
    [ WITH option [ ,...n ] ]

16 would be the severity.
1 would be the state.

The error you get is because you have not properly supplied the required parameters for the RAISEERROR function.

Jquery UI datepicker. Disable array of Dates

IE 8 doesn't have indexOf function, so I used jQuery inArray instead.

$('input').datepicker({
    beforeShowDay: function(date){
        var string = jQuery.datepicker.formatDate('yy-mm-dd', date);
        return [$.inArray(string, array) == -1];
    }
});

CSS3 transitions inside jQuery .css()

Your code can get messy fast when dealing with CSS3 transitions. I would recommend using a plugin such as jQuery Transit that handles the complexity of CSS3 animations/transitions.

Moreover, the plugin uses webkit-transform rather than webkit-transition, which allows for mobile devices to use hardware acceleration in order to give your web apps that native look and feel when the animations occur.

JS Fiddle Live Demo

Javascript:

$("#startTransition").on("click", function()
{

    if( $(".boxOne").is(":visible")) 
    {
        $(".boxOne").transition({ x: '-100%', opacity: 0.1 }, function () { $(".boxOne").hide(); });
        $(".boxTwo").css({ x: '100%' });
        $(".boxTwo").show().transition({ x: '0%', opacity: 1.0 });
        return;        
    }

    $(".boxTwo").transition({ x: '-100%', opacity: 0.1 }, function () { $(".boxTwo").hide(); });
    $(".boxOne").css({ x: '100%' });
    $(".boxOne").show().transition({ x: '0%', opacity: 1.0 });

});

Most of the hard work of getting cross-browser compatibility is done for you as well and it works like a charm on mobile devices.

Setting focus on an HTML input box on page load

This line:

<input type="password" name="PasswordInput"/>

should have an id attribute, like so:

<input type="password" name="PasswordInput" id="PasswordInput"/>

How to center images on a web page for all screen sizes

text-align:center

Applying the text-align:center style to an element containing elements will center those elements.

<div id="method-one" style="text-align:center">
  CSS `text-align:center`
</div>

Thomas Shields mentions this method

margin:0 auto

Applying the margin:0 auto style to a block element will center it within the element it is in.

<div id="method-two" style="background-color:green">
  <div style="margin:0 auto;width:50%;background-color:lightblue">
    CSS `margin:0 auto` to have left and right margin set to center a block element within another element.
  </div>
</div>

user1468562 mentions this method

Center tag

My original answer was that you can use the <center></center> tag. To do this, just place the content you want centered between the tags. As of HTML4, this tag has been deprecated, though. <center> is still technically supported today (9 years later at the time of updating this), but I'd recommend the CSS alternatives I've included above.

<h3>Method 3</h1>
<div id="method-three">
  <center>Center tag (not recommended and deprecated in HTML4)</center>
</div>

You can see these three code samples in action in this jsfiddle.

I decided I should revise this answer as the previous one I gave was outdated. It was already deprecated when I suggested it as a solution and that's all the more reason to avoid it now 9 years later.

JQuery html() vs. innerHTML

Here is some code to get you started. You can modify the behavior of .innerHTML -- you could even create your own complete .innerHTML shim. (P.S.: redefining .innerHTML will also work in Firefox, but not Chrome -- they're working on it.)

if (/(msie|trident)/i.test(navigator.userAgent)) {
 var innerhtml_get = Object.getOwnPropertyDescriptor(HTMLElement.prototype, "innerHTML").get
 var innerhtml_set = Object.getOwnPropertyDescriptor(HTMLElement.prototype, "innerHTML").set
 Object.defineProperty(HTMLElement.prototype, "innerHTML", {
  get: function () {return innerhtml_get.call (this)},
  set: function(new_html) {
   var childNodes = this.childNodes
   for (var curlen = childNodes.length, i = curlen; i > 0; i--) {
    this.removeChild (childNodes[0])
   }
   innerhtml_set.call (this, new_html)
  }
 })
}

var mydiv = document.createElement ('div')
mydiv.innerHTML = "test"
document.body.appendChild (mydiv)

document.body.innerHTML = ""
console.log (mydiv.innerHTML)

http://jsfiddle.net/DLLbc/9/

System.BadImageFormatException An attempt was made to load a program with an incorrect format

It's possibly a 32 - 64 bits mismatch.

If you're running on a 64-bit OS, the Assembly RevitAPI may be compiled as 32-bit and your process as 64-bit or "Any CPU".

Or, the RevitAPI is compiled as 64-bit and your process is compiled as 32-bit or "Any CPU" and running on a 32-bit OS.

Android: View.setID(int id) programmatically - how to avoid ID conflicts?

public String TAG() {
    return this.getClass().getSimpleName();
}

private AtomicInteger lastFldId = null;

public int generateViewId(){

    if(lastFldId == null) {
        int maxFld = 0;
        String fldName = "";
        Field[] flds = R.id.class.getDeclaredFields();
        R.id inst = new R.id();

        for (int i = 0; i < flds.length; i++) {
            Field fld = flds[i];

            try {
                int value = fld.getInt(inst);

                if (value > maxFld) {
                    maxFld = value;
                    fldName = fld.getName();
                }
            } catch (IllegalAccessException e) {
                Log.e(TAG(), "error getting value for \'"+ fld.getName() + "\' " + e.toString());
            }
        }
        Log.d(TAG(), "maxId="+maxFld +"  name="+fldName);
        lastFldId = new AtomicInteger(maxFld);
    }

    return lastFldId.addAndGet(1);
}

Removing single-quote from a string in php

$replace_str = array('"', "'", ",");
$FileName = str_replace($replace_str, "", $UserInput);

Use ASP.NET MVC validation with jquery ajax?

Here's a rather simple solution:

In the controller we return our errors like this:

if (!ModelState.IsValid)
        {
            return Json(new { success = false, errors = ModelState.Values.SelectMany(x => x.Errors).Select(x => x.ErrorMessage).ToList() }, JsonRequestBehavior.AllowGet);
        }

Here's some of the client script:

function displayValidationErrors(errors)
{
    var $ul = $('div.validation-summary-valid.text-danger > ul');

    $ul.empty();
    $.each(errors, function (idx, errorMessage) {
        $ul.append('<li>' + errorMessage + '</li>');
    });
}

That's how we handle it via ajax:

$.ajax({
    cache: false,
    async: true,
    type: "POST",
    url: form.attr('action'),
    data: form.serialize(),
    success: function (data) {
        var isSuccessful = (data['success']);

        if (isSuccessful) {
            $('#partial-container-steps').html(data['view']);
            initializePage();
        }
        else {
            var errors = data['errors'];

            displayValidationErrors(errors);
        }
    }
});

Also, I render partial views via ajax in the following way:

var view = this.RenderRazorViewToString(partialUrl, viewModel);
        return Json(new { success = true, view }, JsonRequestBehavior.AllowGet);

RenderRazorViewToString method:

public string RenderRazorViewToString(string viewName, object model)
    {
        ViewData.Model = model;
        using (var sw = new StringWriter())
        {
            var viewResult = ViewEngines.Engines.FindPartialView(ControllerContext,
                                                                     viewName);
            var viewContext = new ViewContext(ControllerContext, viewResult.View,
                                         ViewData, TempData, sw);
            viewResult.View.Render(viewContext, sw);
            viewResult.ViewEngine.ReleaseView(ControllerContext, viewResult.View);
            return sw.GetStringBuilder().ToString();
        }
    }

How to pass data to all views in Laravel 5?

I think that the best way is with View Composers. If someone came here and want to find how can do it with View Composers way, read my answer => How to share a variable across all views?

How to remove stop words using nltk or python

you can use this function, you should notice that you need to lower all the words

from nltk.corpus import stopwords

def remove_stopwords(word_list):
        processed_word_list = []
        for word in word_list:
            word = word.lower() # in case they arenet all lower cased
            if word not in stopwords.words("english"):
                processed_word_list.append(word)
        return processed_word_list

In React Native, how do I put a view on top of another view, with part of it lying outside the bounds of the view behind?

add the following to the "floating" view

position: 'absolute'

you may also need to add a top and left value for positioning

see this example: https://rnplay.org/apps/OjzcxQ/edit

The maximum message size quota for incoming messages (65536) has been exceeded

You also need to increase maxBufferSize. Also note that you might need to increase the readerQuotas.

How do I include a path to libraries in g++

In your MakeFile or CMakeLists.txt you can set CMAKE_CXX_FLAGS as below:

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -I/path/to/your/folder")

m2e error in MavenArchiver.getManifest()

I also faced the similar issues, changing the version from 2.0.0.RELEASE to 1.5.10.RELEASE worked for me, please try it before downgrading the maven version

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.10.RELEASE</version>
</parent>
<dependencies>
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-web</artifactId>
 </dependency>  
</dependencies>

How the single threaded non blocking IO model works in Node.js

Well, to give some perspective, let me compare node.js with apache.

Apache is a multi-threaded HTTP server, for each and every request that the server receives, it creates a separate thread which handles that request.

Node.js on the other hand is event driven, handling all requests asynchronously from single thread.

When A and B are received on apache, two threads are created which handle requests. Each handling the query separately, each waiting for the query results before serving the page. The page is only served until the query is finished. The query fetch is blocking because the server cannot execute the rest of thread until it receives the result.

In node, c.query is handled asynchronously, which means while c.query fetches the results for A, it jumps to handle c.query for B, and when the results arrive for A arrive it sends back the results to callback which sends the response. Node.js knows to execute callback when fetch finishes.

In my opinion, because it's a single thread model, there is no way to switch from one request to another.

Actually the node server does exactly that for you all the time. To make switches, (the asynchronous behavior) most functions that you would use will have callbacks.

Edit

The SQL query is taken from mysql library. It implements callback style as well as event emitter to queue SQL requests. It does not execute them asynchronously, that is done by the internal libuv threads that provide the abstraction of non-blocking I/O. The following steps happen for making a query :

Open a connection to db, connection itself can be made asynchronously.
Once db is connected, query is passed on to the server. Queries can be queued.
The main event loop gets notified of the completion with callback or event.
Main loop executes your callback/eventhandler.

The incoming requests to http server are handled in the similar fashion. The internal thread architecture is something like this:

node.js event loop

The C++ threads are the libuv ones which do the asynchronous I/O (disk or network). The main event loop continues to execute after the dispatching the request to thread pool. It can accept more requests as it does not wait or sleep. SQL queries/HTTP requests/file system reads all happen this way.

Finding a substring within a list in Python

Use a simple for loop:

seq = ['abc123', 'def456', 'ghi789']
sub = 'abc'

for text in seq:
    if sub in text:
        print(text)

yields

abc123

How to programmatically tell if a Bluetooth device is connected?

Big thanks to Skylarsutton for his answer. I'm posting this as a response to his, but because I'm posting code I can't reply as a comment. I already upvoted his answer so am not looking for any points. Just paying it forward.

For some reason BluetoothAdapter.ACTION_ACL_CONNECTED could not be resolved by Android Studio. Perhaps it was deprecated in Android 4.2.2? Here is a modification of his code. The registration code is the same; the receiver code differs slightly. I use this in a service which updates a Bluetooth-connected flag that other parts of the app reference.

    public void onCreate() {
        //...
        IntentFilter filter = new IntentFilter();
        filter.addAction(BluetoothDevice.ACTION_ACL_CONNECTED);
        filter.addAction(BluetoothDevice.ACTION_ACL_DISCONNECT_REQUESTED);
        filter.addAction(BluetoothDevice.ACTION_ACL_DISCONNECTED);
        this.registerReceiver(BTReceiver, filter);
    }

    //The BroadcastReceiver that listens for bluetooth broadcasts
    private final BroadcastReceiver BTReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();

        if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(action)) {
            //Do something if connected
            Toast.makeText(getApplicationContext(), "BT Connected", Toast.LENGTH_SHORT).show();
        }
        else if (BluetoothDevice.ACTION_ACL_DISCONNECTED.equals(action)) {
            //Do something if disconnected
            Toast.makeText(getApplicationContext(), "BT Disconnected", Toast.LENGTH_SHORT).show();
        }
        //else if...
    }
};

Putting HTML inside Html.ActionLink(), plus No Link Text?

Just use Url.Action instead of Html.ActionLink:

<li id="home_nav"><a href="<%= Url.Action("ActionName") %>"><span>Span text</span></a></li>

How to kill a process running on particular port in Linux?

First you need to do is run (replace with your port number):

fuser -k 3000/tcp

This will release the port. After you run the above command run:

service docker restart

And your problem is resolved.

Disable Pinch Zoom on Mobile Web

This is all I needed:

<meta name="viewport" content="user-scalable=no"/>

Increase bootstrap dropdown menu width

Usually we have the need to control the width of the dropdown menu; specially that's essential when the dropdown menu holds a form, e.g. login form --- then the dropdown menu and its items should be wide enough for ease of inputing username/email and password.

Besides, when the screen is smaller than 768px or when the window (containing the dropdown menu) is zoomed down to smaller than 768px, Bootstrap 3 responsively scales the dropdown menu to the whole width of the screen/window. We need to keep this reponsive action.

Hence, the following css class could do that:

@media (min-width: 768px) {
    .dropdown-menu {
        width: 300px !important;  /* change the number to whatever that you need */
    }
}

(I had used it in my web app.)

What is the purpose of Node.js module.exports and how do you use it?

A module encapsulates related code into a single unit of code. When creating a module, this can be interpreted as moving all related functions into a file.

Suppose there is a file Hello.js which include two functions

sayHelloInEnglish = function() {
  return "Hello";
};
sayHelloInSpanish = function() {
  return "Hola";
};

We write a function only when utility of the code is more than one call.

Suppose we want to increase utility of the function to a different file say World.js,in this case exporting a file comes into picture which can be obtained by module.exports.

You can just export both the function by the code given below

var anyVariable={
 sayHelloInEnglish = function() {
      return "Hello";
    };
  sayHelloInSpanish = function() {
      return "Hola";
    }; 
}
module.export=anyVariable;

Now you just need to require the file name into World.js inorder to use those functions

var world= require("./hello.js");

Why is "throws Exception" necessary when calling a function?

In Java, as you may know, exceptions can be categorized into two: One that needs the throws clause or must be handled if you don't specify one and another one that doesn't. Now, see the following figure:

enter image description here

In Java, you can throw anything that extends the Throwable class. However, you don't need to specify a throws clause for all classes. Specifically, classes that are either an Error or RuntimeException or any of the subclasses of these two. In your case Exception is not a subclass of an Error or RuntimeException. So, it is a checked exception and must be specified in the throws clause, if you don't handle that particular exception. That is why you needed the throws clause.

From Java Tutorial:

An exception is an event, which occurs during the execution of a program, that disrupts the normal flow of the program's instructions.

Now, as you know exceptions are classified into two: checked and unchecked. Why these classification?

Checked Exception: They are used to represent problems that can be recovered during the execution of the program. They usually are not the programmer's fault. For example, a file specified by user is not readable, or no network connection available, etc., In all these cases, our program doesn't need to exit, instead it can take actions like alerting the user, or go into a fallback mechanism(like offline working when network not available), etc.

Unchecked Exceptions: They again can be divided into two: Errors and RuntimeExceptions. One reason for them to be unchecked is that they are numerous in number, and required to handle all of them will clutter our program and reduce its clarity. The other reason is:

Runtime Exceptions: They usually happen due to a fault by the programmer. For example, if an ArithmeticException of division by zero occurs or an ArrayIndexOutOfBoundsException occurs, it is because we are not careful enough in our coding. They happen usually because some errors in our program logic. So, they must be cleared before our program enters into production mode. They are unchecked in the sense that, our program must fail when it occurs, so that we programmers can resolve it at the time of development and testing itself.
Errors: Errors are situations from which usually the program cannot recover. For example, if a StackOverflowError occurs, our program cannot do much, such as increase the size of program's function calling stack. Or if an OutOfMemoryError occurs, we cannot do much to increase the amount of RAM available to our program. In such cases, it is better to exit the program. That is why they are made unchecked.

For detailed information see:

Bulk create model objects in django

as of the django development, there exists bulk_create as an object manager method which takes as input an array of objects created using the class constructor. check out django docs

What exactly does the Access-Control-Allow-Credentials header do?

By default, CORS does not include cookies on cross-origin requests. This is different from other cross-origin techniques such as JSON-P. JSON-P always includes cookies with the request, and this behavior can lead to a class of vulnerabilities called cross-site request forgery, or CSRF.

In order to reduce the chance of CSRF vulnerabilities in CORS, CORS requires both the server and the client to acknowledge that it is ok to include cookies on requests. Doing this makes cookies an active decision, rather than something that happens passively without any control.

The client code must set the withCredentials property on the XMLHttpRequest to true in order to give permission.

However, this header alone is not enough. The server must respond with the Access-Control-Allow-Credentials header. Responding with this header to true means that the server allows cookies (or other user credentials) to be included on cross-origin requests.

You also need to make sure your browser isn't blocking third-party cookies if you want cross-origin credentialed requests to work.

Note that regardless of whether you are making same-origin or cross-origin requests, you need to protect your site from CSRF (especially if your request includes cookies).

How to find top three highest salary in emp table in oracle?

SELECT * FROM Employees
WHERE rownum <= 3
ORDER BY Salary ;

CSS how to make scrollable list

Another solution would be as below where the list is placed under a drop-down button.

  <button class="btn dropdown-toggle btn-primary btn-sm" data-toggle="dropdown"
    >Markets<span class="caret"></span></button>

    <ul class="dropdown-menu", style="height:40%; overflow:hidden; overflow-y:scroll;">
      {{ form.markets }}
    </ul>

AngularJS - Does $destroy remove event listeners?

Event listeners

First off it's important to understand that there are two kinds of "event listeners":

Scope event listeners registered via $on:

$scope.$on('anEvent', function (event, data) {
  ...
});

Event handlers attached to elements via for example on or bind:
```
element.on('click', function (event) {
  ...
});
```

$scope.$destroy()

When $scope.$destroy() is executed it will remove all listeners registered via $on on that $scope.

It will not remove DOM elements or any attached event handlers of the second kind.

This means that calling $scope.$destroy() manually from example within a directive's link function will not remove a handler attached via for example element.on, nor the DOM element itself.

element.remove()

Note that remove is a jqLite method (or a jQuery method if jQuery is loaded before AngularjS) and is not available on a standard DOM Element Object.

When element.remove() is executed that element and all of its children will be removed from the DOM together will all event handlers attached via for example element.on.

It will not destroy the $scope associated with the element.

To make it more confusing there is also a jQuery event called $destroy. Sometimes when working with third-party jQuery libraries that remove elements, or if you remove them manually, you might need to perform clean up when that happens:

element.on('$destroy', function () {
  scope.$destroy();
});

What to do when a directive is "destroyed"

This depends on how the directive is "destroyed".

A normal case is that a directive is destroyed because ng-view changes the current view. When this happens the ng-view directive will destroy the associated $scope, sever all the references to its parent scope and call remove() on the element.

This means that if that view contains a directive with this in its link function when it's destroyed by ng-view:

scope.$on('anEvent', function () {
 ...
});

element.on('click', function () {
 ...
});

Both event listeners will be removed automatically.

However, it's important to note that the code inside these listeners can still cause memory leaks, for example if you have achieved the common JS memory leak pattern circular references.

Even in this normal case of a directive getting destroyed due to a view changing there are things you might need to manually clean up.

For example if you have registered a listener on $rootScope:

var unregisterFn = $rootScope.$on('anEvent', function () {});

scope.$on('$destroy', unregisterFn);

This is needed since $rootScope is never destroyed during the lifetime of the application.

The same goes if you are using another pub/sub implementation that doesn't automatically perform the necessary cleanup when the $scope is destroyed, or if your directive passes callbacks to services.

Another situation would be to cancel $interval/$timeout:

var promise = $interval(function () {}, 1000);

scope.$on('$destroy', function () {
  $interval.cancel(promise);
});

If your directive attaches event handlers to elements for example outside the current view, you need to manually clean those up as well:

var windowClick = function () {
   ...
};

angular.element(window).on('click', windowClick);

scope.$on('$destroy', function () {
  angular.element(window).off('click', windowClick);
});

These were some examples of what to do when directives are "destroyed" by Angular, for example by ng-view or ng-if.

If you have custom directives that manage the lifecycle of DOM elements etc. it will of course get more complex.

Is it possible to have a multi-line comments in R?

CTRL+SHIFT+C in Eclipse + StatET and Rstudio.

error: This is probably not a problem with npm. There is likely additional logging output above

Check if port you want to run your app is free. For me, it was the problem.

How can I right-align text in a DataGridView column?

you can edit all the columns at once by using this simple code via Foreach loop

        foreach (DataGridViewColumn item in datagridview1.Columns)
        {
            item.DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleRight;
        }

Android - set TextView TextStyle programmatically?

Let's say you have a style called RedHUGEText on your values/styles.xml:

<style name="RedHUGEText" parent="@android:style/Widget.TextView">
    <item name="android:textSize">@dimen/text_size_huge</item>
    <item name="android:textColor">@color/red</item>
    <item name="android:textStyle">bold</item>
</style>

Just create your TextView as usual in the XML layout/your_layout.xml file, let's say:

<TextView android:id="@+id/text_view_title" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content 
    android:text="FOO" />

And in the java code of your Activity you do this:

TextView textViewTitle = (TextView) findViewById(R.id.text_view_title);
textViewTitle.setTextAppearance(this, R.style.RedHUGEText);

It worked for me! And it applied color, size, gravity, etc. I've used it on handsets and tablets with Android API Levels from 8 to 17 with no problems. Note that as of Android 23, that method has been deprecated. The context argument has been dropped, so the last line would need to be:

textViewTitle.setTextAppearance(R.style.RedHUGEText);

Remember... this is useful only if the style of the text really depends on a condition on your Java logic or you are building the UI "on the fly" with code... if it doesn't, it is better to just do:

<TextView android:id="@+id/text_view_title" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content 
    android:text="FOO" 
    style="@style/RedHUGEText" />

You can always have it your way!

How to get exact browser name and version?

this JavaScript give you the browser name and the version,

var browser = '';
var browserVersion = 0;

if (/Opera[\/\s](\d+\.\d+)/.test(navigator.userAgent)) {
    browser = 'Opera';
} else if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)) {
    browser = 'MSIE';
} else if (/Navigator[\/\s](\d+\.\d+)/.test(navigator.userAgent)) {
    browser = 'Netscape';
} else if (/Chrome[\/\s](\d+\.\d+)/.test(navigator.userAgent)) {
    browser = 'Chrome';
} else if (/Safari[\/\s](\d+\.\d+)/.test(navigator.userAgent)) {
    browser = 'Safari';
    /Version[\/\s](\d+\.\d+)/.test(navigator.userAgent);
    browserVersion = new Number(RegExp.$1);
} else if (/Firefox[\/\s](\d+\.\d+)/.test(navigator.userAgent)) {
    browser = 'Firefox';
}
if(browserVersion === 0){
    browserVersion = parseFloat(new Number(RegExp.$1));
}
alert(browser + "*" + browserVersion);

PDF to byte array and vice versa

The problem is that you are calling toString() on the InputStream object itself. This will return a String representation of the InputStream object not the actual PDF document.

You want to read the PDF only as bytes as PDF is a binary format. You will then be able to write out that same byte array and it will be a valid PDF as it has not been modified.

e.g. to read a file as bytes

File file = new File(sourcePath);
InputStream inputStream = new FileInputStream(file); 
byte[] bytes = new byte[file.length()];
inputStream.read(bytes);

.htaccess - how to force "www." in a generic way?

I would use this rule:

RewriteEngine On
RewriteCond %{HTTP_HOST} !=""
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteCond %{HTTPS}s ^on(s)|
RewriteRule ^ http%1://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

The first condition checks whether the Host value is not empty (in case of HTTP/1.0); the second checks whether the the Host value does not begin with www.; the third checks for HTTPS (%{HTTPS} is either on or off, so %{HTTPS}s is either ons or offs and in case of ons the s is matched). The substitution part of RewriteRule then just merges the information parts to a full URL.

in iPhone App How to detect the screen resolution of the device

For iOS 8 we can just use this [UIScreen mainScreen].nativeBounds , like that:

- (NSInteger)resolutionX
{
    return CGRectGetWidth([UIScreen mainScreen].nativeBounds);
}

- (NSInteger)resolutionY
{
    return CGRectGetHeight([UIScreen mainScreen].nativeBounds);
}

Does Java have a complete enum for HTTP response codes?

If you are using Netty, you can use:

io.netty.handler.codec.http.HttpResponseStatus

How to remove decimal part from a number in C#

Use Math.Round

int d = (int) Math.Round(a, 0);

java.lang.IllegalStateException: Error processing condition on org.springframework.boot.autoconfigure.jdbc.JndiDataSourceAutoConfiguration

I had the same its because of version incompatibility check for version or remove version if using spring boot

Getting Checkbox Value in ASP.NET MVC 4

public ActionResult Index(string username, string password, string rememberMe)
{
   if (!string.IsNullOrEmpty(username))
   {
      bool remember = bool.Parse(rememberMe);
      //...
   }
   return View();
}

How to uninstall an older PHP version from centOS7

Subscribing to the IUS Community Project Repository

cd ~
curl 'https://setup.ius.io/' -o setup-ius.sh

Run the script:

sudo bash setup-ius.sh

Upgrading mod_php with Apache

This section describes the upgrade process for a system using Apache as the web server and mod_php to execute PHP code. If, instead, you are running Nginx and PHP-FPM, skip ahead to the next section.

Begin by removing existing PHP packages. Press y and hit Enter to continue when prompted.

sudo yum remove php-cli mod_php php-common

Install the new PHP 7 packages from IUS. Again, press y and Enter when prompted.

sudo yum install mod_php70u php70u-cli php70u-mysqlnd

Finally, restart Apache to load the new version of mod_php:

sudo apachectl restart

You can check on the status of Apache, which is managed by the httpd systemd unit, using systemctl:

systemctl status httpd

IntelliJ inspection gives "Cannot resolve symbol" but still compiles code

I'm jealous of all of you who resolved through File / Invalidate caches. I just spent hours trying everything on this question and a few others from around the web.

The magic menu item didn't do it for me so I invalidated the caches myself by nuking %USERPROFILE%\AppData\Local\JetBrains\IntelliJIdea2020.3\caches

Once I did this and restarted IntelliJ (2020.3), the indexes were rebuilt and my errors went away.

How to check if a string starts with "_" in PHP?

$variable[0] != "_"

How does it work?

In PHP you can get particular character of a string with array index notation. $variable[0] is the first character of a string (if $variable is a string).

Programs & Examples On #Resolveclienturl

Cannot use a leading ../ to exit above the top directory

WP -- Get posts by category?

PhoneGap Eclipse Issue - eglCodecCommon glUtilsParamSize: unknow param errors

How can I count the numbers of rows that a MySQL query returned?

Creating a border like this using :before And :after Pseudo-Elements In CSS?

setting textColor in TextView in layout/main.xml main layout file not referencing colors.xml file. (It wants a #RRGGBB instead of @color/text_color)

XSLT counting elements with a given value

Inner text shadow with CSS

Creating a LinkedList class from scratch

Composer Warning: openssl extension is missing. How to enable in WAMP

What is the difference between "mvn deploy" to a local repo and "mvn install"?

Sum function in VBA

Target a css class inside another css class

CSS

HTML

What primitive data type is time_t?

Unix's 'ls' sort by name

Java String to Date object of the format "yyyy-mm-dd HH:mm:ss"

How to deserialize a list using GSON or another JSON library in Java?

What is a good naming convention for vars, methods, etc in C++?

How do I rename a repository on GitHub?

matplotlib colorbar in each subplot

Get integer value from string in swift

I am getting "java.lang.ClassNotFoundException: com.google.gson.Gson" error even though it is defined in my classpath

How to get current time in python and break up into year, month, day, hour, minute?

How to delete a stash created with git stash create?

What is the iOS 5.0 user agent string?

Read JSON data in a shell script

Reset textbox value in javascript

Graphical DIFF programs for linux

Remove duplicate elements from array in Ruby

Set value of hidden input with jquery

If isset $_POST

Ruby capitalize every word first letter

How to merge lists into a list of tuples?

bodyParser is deprecated express 4

What are the differences between git branch, fork, fetch, merge, rebase and clone?

Git

Local repositories

Branches

Tracking branches

Fetching new branches.

Merging

Interactive rebasing and squashing / reordering / removing commits

Forks

GitHub

Clones

Visualization

GUI Learning Tool

Finally, 7 key lifesavers!

How to check if mysql database exists

Sorting HashMap by values

How can I store the result of a system command in a Perl variable?

Convert String to int array in java

Flask Error: "Method Not Allowed The method is not allowed for the requested URL"

.htaccess, order allow, deny, deny from all: confused?

How to print Unicode character in Python?

SQL Server 2008 Row Insert and Update timestamps

How do I get the value of a textbox using jQuery?

Convert DateTime to long and also the other way around

What are libtool's .la file for?

How to Convert JSON object to Custom C# object?

Setting DIV width and height in JavaScript

What is the difference between new/delete and malloc/free?

How to trigger ngClick programmatically

Fixed positioned div within a relative parent div

How to add a RequiredFieldValidator to DropDownList control?

How do I use a C# Class Library in a project?

"Warning: iPhone apps should include an armv6 architecture" even with build config set

Get SELECT's value and text in jQuery

How to print a dictionary line by line in Python?

Multiple try codes in one block

How to change icon on Google map marker

Sorting a tab delimited file

How to create a css rule for all elements except one class?

AWS S3: how do I see how much disk space is using

How to prevent gcc optimizing some statements in C?

How do I get the unix timestamp in C as an int?

How to convert current date into string in java?