We need to cover at least these aspects to provide a comprehensive answer/comparison (in no particular order of importance): Speed, Memory usage, Syntax and Features.

My intent is to cover each one of these as clearly as possible from data.table perspective.

Note: unless explicitly mentioned otherwise, by referring to dplyr, we refer to dplyr's data.frame interface whose internals are in C++ using Rcpp.

The data.table syntax is consistent in its form - DT[i, j, by]. To keep i, j and by together is by design. By keeping related operations together, it allows to easily optimise operations for speed and more importantly memory usage, and also provide some powerful features, all while maintaining the consistency in syntax.

1. Speed

Quite a few benchmarks (though mostly on grouping operations) have been added to the question already showing data.table gets faster than dplyr as the number of groups and/or rows to group by increase, including benchmarks by Matt on grouping from 10 million to 2 billion rows (100GB in RAM) on 100 - 10 million groups and varying grouping columns, which also compares pandas. See also updated benchmarks, which include Spark and pydatatable as well.

On benchmarks, it would be great to cover these remaining aspects as well:

• Grouping operations involving a subset of rows - i.e., DT[x > val, sum(y), by = z] type operations.

• Benchmark other operations such as update and joins.

• Also benchmark memory footprint for each operation in addition to runtime.

2. Memory usage

1. Operations involving filter() or slice() in dplyr can be memory inefficient (on both data.frames and data.tables). See this post.

   Note that Hadley's comment talks about speed (that dplyr is plentiful fast for him), whereas the major concern here is memory.

2. data.table interface at the moment allows one to modify/update columns by reference (note that we don't need to re-assign the result back to a variable).

   # sub-assign by reference, updates 'y' in-place
   DT[x >= 1L, y := NA]
   

   But dplyr will never update by reference. The dplyr equivalent would be (note that the result needs to be re-assigned):

   # copies the entire 'y' column
   ans <- DF %>% mutate(y = replace(y, which(x >= 1L), NA))
   

   A concern for this is referential transparency. Updating a data.table object by reference, especially within a function may not be always desirable. But this is an incredibly useful feature: see this and this posts for interesting cases. And we want to keep it.

   Therefore we are working towards exporting shallow() function in data.table that will provide the user with both possibilities. For example, if it is desirable to not modify the input data.table within a function, one can then do:

   foo <- function(DT) {
       DT = shallow(DT)          ## shallow copy DT
       DT[, newcol := 1L]        ## does not affect the original DT 
       DT[x > 2L, newcol := 2L]  ## no need to copy (internally), as this column exists only in shallow copied DT
       DT[x > 2L, x := 3L]       ## have to copy (like base R / dplyr does always); otherwise original DT will 
                                 ## also get modified.
   }
   

   By not using shallow(), the old functionality is retained:

   bar <- function(DT) {
       DT[, newcol := 1L]        ## old behaviour, original DT gets updated by reference
       DT[x > 2L, x := 3L]       ## old behaviour, update column x in original DT.
   }
   

   By creating a shallow copy using shallow(), we understand that you don't want to modify the original object. We take care of everything internally to ensure that while also ensuring to copy columns you modify only when it is absolutely necessary. When implemented, this should settle the referential transparency issue altogether while providing the user with both possibilties.

   Also, once shallow() is exported dplyr's data.table interface should avoid almost all copies. So those who prefer dplyr's syntax can use it with data.tables.

   But it will still lack many features that data.table provides, including (sub)-assignment by reference.

3. Aggregate while joining:

   Suppose you have two data.tables as follows:

   DT1 = data.table(x=c(1,1,1,1,2,2,2,2), y=c("a", "a", "b", "b"), z=1:8, key=c("x", "y"))
   #    x y z
   # 1: 1 a 1
   # 2: 1 a 2
   # 3: 1 b 3
   # 4: 1 b 4
   # 5: 2 a 5
   # 6: 2 a 6
   # 7: 2 b 7
   # 8: 2 b 8
   DT2 = data.table(x=1:2, y=c("a", "b"), mul=4:3, key=c("x", "y"))
   #    x y mul
   # 1: 1 a   4
   # 2: 2 b   3
   

   And you would like to get sum(z) * mul for each row in DT2 while joining by columns x,y. We can either:

   • 1) aggregate DT1 to get sum(z), 2) perform a join and 3) multiply (or)

     # data.table way
     DT1[, .(z = sum(z)), keyby = .(x,y)][DT2][, z := z*mul][]
     
     # dplyr equivalent
     DF1 %>% group_by(x, y) %>% summarise(z = sum(z)) %>% 
         right_join(DF2) %>% mutate(z = z * mul)
     

   • 2) do it all in one go (using by = .EACHI feature):

     DT1[DT2, list(z=sum(z) * mul), by = .EACHI]
     

   What is the advantage?

   • We don't have to allocate memory for the intermediate result.

   • We don't have to group/hash twice (one for aggregation and other for joining).

   • And more importantly, the operation what we wanted to perform is clear by looking at j in (2).

   Check this post for a detailed explanation of by = .EACHI. No intermediate results are materialised, and the join+aggregate is performed all in one go.

   Have a look at this, this and this posts for real usage scenarios.

   In dplyr you would have to join and aggregate or aggregate first and then join, neither of which are as efficient, in terms of memory (which in turn translates to speed).

4. Update and joins:

   Consider the data.table code shown below:

   DT1[DT2, col := i.mul]
   

   adds/updates DT1's column col with mul from DT2 on those rows where DT2's key column matches DT1. I don't think there is an exact equivalent of this operation in dplyr, i.e., without avoiding a *_join operation, which would have to copy the entire DT1 just to add a new column to it, which is unnecessary.

   Check this post for a real usage scenario.

To summarise, it is important to realise that every bit of optimisation matters. As Grace Hopper would say, Mind your nanoseconds!

3. Syntax

Let's now look at syntax. Hadley commented here:

Data tables are extremely fast but I think their concision makes it harder to learn and code that uses it is harder to read after you have written it ...

I find this remark pointless because it is very subjective. What we can perhaps try is to contrast consistency in syntax. We will compare data.table and dplyr syntax side-by-side.

We will work with the dummy data shown below:

DT = data.table(x=1:10, y=11:20, z=rep(1:2, each=5))
DF = as.data.frame(DT)

1. Basic aggregation/update operations.

   # case (a)
   DT[, sum(y), by = z]                       ## data.table syntax
   DF %>% group_by(z) %>% summarise(sum(y)) ## dplyr syntax
   DT[, y := cumsum(y), by = z]
   ans <- DF %>% group_by(z) %>% mutate(y = cumsum(y))
   
   # case (b)
   DT[x > 2, sum(y), by = z]
   DF %>% filter(x>2) %>% group_by(z) %>% summarise(sum(y))
   DT[x > 2, y := cumsum(y), by = z]
   ans <- DF %>% group_by(z) %>% mutate(y = replace(y, which(x > 2), cumsum(y)))
   
   # case (c)
   DT[, if(any(x > 5L)) y[1L]-y[2L] else y[2L], by = z]
   DF %>% group_by(z) %>% summarise(if (any(x > 5L)) y[1L] - y[2L] else y[2L])
   DT[, if(any(x > 5L)) y[1L] - y[2L], by = z]
   DF %>% group_by(z) %>% filter(any(x > 5L)) %>% summarise(y[1L] - y[2L])
   

   • data.table syntax is compact and dplyr's quite verbose. Things are more or less equivalent in case (a).

   • In case (b), we had to use filter() in dplyr while summarising. But while updating, we had to move the logic inside mutate(). In data.table however, we express both operations with the same logic - operate on rows where x > 2, but in first case, get sum(y), whereas in the second case update those rows for y with its cumulative sum.

     This is what we mean when we say the DT[i, j, by] form is consistent.

   • Similarly in case (c), when we have if-else condition, we are able to express the logic "as-is" in both data.table and dplyr. However, if we would like to return just those rows where the if condition satisfies and skip otherwise, we cannot use summarise() directly (AFAICT). We have to filter() first and then summarise because summarise() always expects a single value.

     While it returns the same result, using filter() here makes the actual operation less obvious.

     It might very well be possible to use filter() in the first case as well (does not seem obvious to me), but my point is that we should not have to.

2. Aggregation / update on multiple columns

   # case (a)
   DT[, lapply(.SD, sum), by = z]                     ## data.table syntax
   DF %>% group_by(z) %>% summarise_each(funs(sum)) ## dplyr syntax
   DT[, (cols) := lapply(.SD, sum), by = z]
   ans <- DF %>% group_by(z) %>% mutate_each(funs(sum))
   
   # case (b)
   DT[, c(lapply(.SD, sum), lapply(.SD, mean)), by = z]
   DF %>% group_by(z) %>% summarise_each(funs(sum, mean))
   
   # case (c)
   DT[, c(.N, lapply(.SD, sum)), by = z]     
   DF %>% group_by(z) %>% summarise_each(funs(n(), mean))
   

   • In case (a), the codes are more or less equivalent. data.table uses familiar base function lapply(), whereas dplyr introduces *_each() along with a bunch of functions to funs().

   • data.table's := requires column names to be provided, whereas dplyr generates it automatically.

   • In case (b), dplyr's syntax is relatively straightforward. Improving aggregations/updates on multiple functions is on data.table's list.

   • In case (c) though, dplyr would return n() as many times as many columns, instead of just once. In data.table, all we need to do is to return a list in j. Each element of the list will become a column in the result. So, we can use, once again, the familiar base function c() to concatenate .N to a list which returns a list.

   Note: Once again, in data.table, all we need to do is return a list in j. Each element of the list will become a column in result. You can use c(), as.list(), lapply(), list() etc... base functions to accomplish this, without having to learn any new functions.

   You will need to learn just the special variables - .N and .SD at least. The equivalent in dplyr are n() and .

3. Joins

   dplyr provides separate functions for each type of join where as data.table allows joins using the same syntax DT[i, j, by] (and with reason). It also provides an equivalent merge.data.table() function as an alternative.

   setkey(DT1, x, y)
   
   # 1. normal join
   DT1[DT2]            ## data.table syntax
   left_join(DT2, DT1) ## dplyr syntax
   
   # 2. select columns while join    
   DT1[DT2, .(z, i.mul)]
   left_join(select(DT2, x, y, mul), select(DT1, x, y, z))
   
   # 3. aggregate while join
   DT1[DT2, .(sum(z) * i.mul), by = .EACHI]
   DF1 %>% group_by(x, y) %>% summarise(z = sum(z)) %>% 
       inner_join(DF2) %>% mutate(z = z*mul) %>% select(-mul)
   
   # 4. update while join
   DT1[DT2, z := cumsum(z) * i.mul, by = .EACHI]
   ??
   
   # 5. rolling join
   DT1[DT2, roll = -Inf]
   ??
   
   # 6. other arguments to control output
   DT1[DT2, mult = "first"]
   ??
   

   • Some might find a separate function for each joins much nicer (left, right, inner, anti, semi etc), whereas as others might like data.table's DT[i, j, by], or merge() which is similar to base R.

   • However dplyr joins do just that. Nothing more. Nothing less.

   • data.tables can select columns while joining (2), and in dplyr you will need to select() first on both data.frames before to join as shown above. Otherwise you would materialiase the join with unnecessary columns only to remove them later and that is inefficient.

   • data.tables can aggregate while joining (3) and also update while joining (4), using by = .EACHI feature. Why materialse the entire join result to add/update just a few columns?

   • data.table is capable of rolling joins (5) - roll forward, LOCF, roll backward, NOCB, nearest.

   • data.table also has mult = argument which selects first, last or all matches (6).

   • data.table has allow.cartesian = TRUE argument to protect from accidental invalid joins.

Once again, the syntax is consistent with DT[i, j, by] with additional arguments allowing for controlling the output further.

4. do()...

   dplyr's summarise is specially designed for functions that return a single value. If your function returns multiple/unequal values, you will have to resort to do(). You have to know beforehand about all your functions return value.

   DT[, list(x[1], y[1]), by = z]                 ## data.table syntax
   DF %>% group_by(z) %>% summarise(x[1], y[1]) ## dplyr syntax
   DT[, list(x[1:2], y[1]), by = z]
   DF %>% group_by(z) %>% do(data.frame(.$x[1:2], .$y[1]))
   
   DT[, quantile(x, 0.25), by = z]
   DF %>% group_by(z) %>% summarise(quantile(x, 0.25))
   DT[, quantile(x, c(0.25, 0.75)), by = z]
   DF %>% group_by(z) %>% do(data.frame(quantile(.$x, c(0.25, 0.75))))
   
   DT[, as.list(summary(x)), by = z]
   DF %>% group_by(z) %>% do(data.frame(as.list(summary(.$x))))
   

   • .SD's equivalent is .

   • In data.table, you can throw pretty much anything in j - the only thing to remember is for it to return a list so that each element of the list gets converted to a column.

   • In dplyr, cannot do that. Have to resort to do() depending on how sure you are as to whether your function would always return a single value. And it is quite slow.

Once again, data.table's syntax is consistent with DT[i, j, by]. We can just keep throwing expressions in j without having to worry about these things.

Have a look at this SO question and this one. I wonder if it would be possible to express the answer as straightforward using dplyr's syntax...

To summarise, I have particularly highlighted several instances where dplyr's syntax is either inefficient, limited or fails to make operations straightforward. This is particularly because data.table gets quite a bit of backlash about "harder to read/learn" syntax (like the one pasted/linked above). Most posts that cover dplyr talk about most straightforward operations. And that is great. But it is important to realise its syntax and feature limitations as well, and I am yet to see a post on it.

data.table has its quirks as well (some of which I have pointed out that we are attempting to fix). We are also attempting to improve data.table's joins as I have highlighted here.

But one should also consider the number of features that dplyr lacks in comparison to data.table.

4. Features

I have pointed out most of the features here and also in this post. In addition:

• fread - fast file reader has been available for a long time now.

• fwrite - a parallelised fast file writer is now available. See this post for a detailed explanation on the implementation and #1664 for keeping track of further developments.

• Automatic indexing - another handy feature to optimise base R syntax as is, internally.

• Ad-hoc grouping: dplyr automatically sorts the results by grouping variables during summarise(), which may not be always desirable.

• Numerous advantages in data.table joins (for speed / memory efficiency and syntax) mentioned above.

• Non-equi joins: Allows joins using other operators <=, <, >, >= along with all other advantages of data.table joins.

• Overlapping range joins was implemented in data.table recently. Check this post for an overview with benchmarks.

• setorder() function in data.table that allows really fast reordering of data.tables by reference.

• dplyr provides interface to databases using the same syntax, which data.table does not at the moment.

• data.table provides faster equivalents of set operations (written by Jan Gorecki) - fsetdiff, fintersect, funion and fsetequal with additional all argument (as in SQL).

• data.table loads cleanly with no masking warnings and has a mechanism described here for [.data.frame compatibility when passed to any R package. dplyr changes base functions filter, lag and [ which can cause problems; e.g. here and here.

Finally:

• On databases - there is no reason why data.table cannot provide similar interface, but this is not a priority now. It might get bumped up if users would very much like that feature.. not sure.

• On parallelism - Everything is difficult, until someone goes ahead and does it. Of course it will take effort (being thread safe).

  • Progress is being made currently (in v1.9.7 devel) towards parallelising known time consuming parts for incremental performance gains using OpenMP.

If you want to paste some clipboard content at the end of the file type:

:$ put +

$ ............ last line
put .......... paste 
+ ............ clipboard

regarding the recommended answer's code,

For my bot the recommended answer did not work. This is because I'm using Chrome which is requiring me to use KEYEVENTF_SCANCODE in my dwFlags.

To get his code to work I had to modify these code blocks:

class KEYBDINPUT(ctypes.Structure):
    _fields_ = (("wVk",         wintypes.WORD),
                ("wScan",       wintypes.WORD),
                ("dwFlags",     wintypes.DWORD),
                ("time",        wintypes.DWORD),
                ("dwExtraInfo", wintypes.ULONG_PTR))

    def __init__(self, *args, **kwds):
        super(KEYBDINPUT, self).__init__(*args, **kwds)
        # some programs use the scan code even if KEYEVENTF_SCANCODE
        # isn't set in dwFflags, so attempt to map the correct code.
        #if not self.dwFlags & KEYEVENTF_UNICODE:l
            #self.wScan = user32.MapVirtualKeyExW(self.wVk,
                                                 #MAPVK_VK_TO_VSC, 0)
            # ^MAKE SURE YOU COMMENT/REMOVE THIS CODE^

def PressKey(keyCode):
    input = INPUT(type=INPUT_KEYBOARD,
              ki=KEYBDINPUT(wScan=keyCode,
                            dwFlags=KEYEVENTF_SCANCODE))
    user32.SendInput(1, ctypes.byref(input), ctypes.sizeof(input))

def ReleaseKey(keyCode):
    input = INPUT(type=INPUT_KEYBOARD,
              ki=KEYBDINPUT(wScan=keyCode,
                            dwFlags=KEYEVENTF_SCANCODE | KEYEVENTF_KEYUP))
    user32.SendInput(1, ctypes.byref(input), ctypes.sizeof(input))

time.sleep(5) # sleep to open browser tab
PressKey(0x26) # press right arrow key
time.sleep(2) # hold for 2 seconds
ReleaseKey(0x26) # release right arrow key

I hope this helps someone's headache!

Ctrl+C sends a SIGINT signal.

kill -INT <pid> sends a SIGINT signal too:

# Terminates the program (like Ctrl+C)
kill -INT 888
# Force kill
kill -9 888

Assuming 888 is your process ID.

Note that kill 888 sends a SIGTERM signal, which is slightly different, but will also ask for the program to stop. So if you know what you are doing (no handler bound to SIGINT in the program), a simple kill is enough.

To get the PID of the last command launched in your script, use $! :

# Launch script in background
./my_script.sh &
# Get its PID
PID=$!
# Wait for 2 seconds
sleep 2
# Kill it
kill $PID

You can write your own touch.

//touch.cpp
#include <fstream>
#include <iostream>

int main(int argc, char ** argv;)
{
  if(argc !=2)
  {
    std::cerr << "Must supply a filename as argument" << endl;
    return 1;
  }
  std::ofstream foo(argv[1]);
  foo.close();
  return 0;
}

I would recommend taking a look at jQuery UI autocomplete widget. They handled most of the cases there since their code base is more mature than most ones out there.

Below is a link to a demo page so you can verify it works. http://jqueryui.com/demos/autocomplete/#default

You will get the most benefit from reading the source and seeing how they solved it. You can find it here: https://github.com/jquery/jquery-ui/blob/master/ui/jquery.ui.autocomplete.js.

Basically they do it all, they bind to input, keydown, keyup, keypress, focus and blur. Then they have special handling for all sorts of keys like page up, page down, up arrow key and down arrow key. A timer is used before getting the contents of the textbox. When a user types a key that does not correspond to a command (up key, down key and so on) there is a timer that explorers the content after about 300 milliseconds. It looks like this in the code:

// switch statement in the 
switch( event.keyCode ) {
            //...
            case keyCode.ENTER:
            case keyCode.NUMPAD_ENTER:
                // when menu is open and has focus
                if ( this.menu.active ) {
                    // #6055 - Opera still allows the keypress to occur
                    // which causes forms to submit
                    suppressKeyPress = true;
                    event.preventDefault();
                    this.menu.select( event );
                }
                break;
            default:
                suppressKeyPressRepeat = true;
                // search timeout should be triggered before the input value is changed
                this._searchTimeout( event );
                break;
            }
// ...
// ...
_searchTimeout: function( event ) {
    clearTimeout( this.searching );
    this.searching = this._delay(function() { // * essentially a warpper for a setTimeout call *
        // only search if the value has changed
        if ( this.term !== this._value() ) { // * _value is a wrapper to get the value *
            this.selectedItem = null;
            this.search( null, event );
        }
    }, this.options.delay );
},

The reason to use a timer is so that the UI gets a chance to be updated. When Javascript is running the UI cannot be updated, therefore the call to the delay function. This works well for other situations such as keeping focus on the textbox (used by that code).

So you can either use the widget or copy the code into your own widget if you are not using jQuery UI (or in my case developing a custom widget).

Please find below mentioned solution. In this user can be able to enter only numeric value, Also user can not be able to copy, paste, drag and drop in input.

Allowed Characters

0,1,2,3,4,5,6,7,8,9

Not allowed Characters and Characters through events

• Alphabetic value
• Special characters
• Copy
• Paste
• Drag
• Drop

$(document).ready(function() {_x000D_
  $('#number').bind("cut copy paste drag drop", function(e) {_x000D_
      e.preventDefault();_x000D_
  });     _x000D_
});_x000D_
function isNumberKey(evt) {_x000D_
    var charCode = (evt.which) ? evt.which : evt.keyCode;_x000D_
    if (charCode > 31 && (charCode < 48 || charCode > 57))_x000D_
        return false;_x000D_
    return true;_x000D_
}

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
_x000D_
<input type="text" class="form-control" name="number" id="number" onkeypress="return isNumberKey(event)" placeholder="Enter Numeric value only">

Let me know if it not works.

If you are on windows, you can use PeekConsoleInput to detect if there's any input,

HANDLE handle = GetStdHandle(STD_INPUT_HANDLE);
DWORD events;
INPUT_RECORD buffer;
PeekConsoleInput( handle, &buffer, 1, &events );

then use ReadConsoleInput to "consume" the input character ..

PeekConsoleInput(handle, &buffer, 1, &events);
if(events > 0)
{
    ReadConsoleInput(handle, &buffer, 1, &events);  
    return buffer.Event.KeyEvent.wVirtualKeyCode;
}
else return 0

to be honest this is from some old code I have, so you have to fiddle a bit with it.

The cool thing though is that it reads input without prompting for anything, so the characters are not displayed at all.

The idle shortcut is an "Advertised Shortcut" which breaks certain features like the "find target" button. Google for more info.

You can view the link with a hex editor or download LNK Parser to see where it points to.

In my case it runs:
..\..\..\..\..\Python27\pythonw.exe "C:\Python27\Lib\idlelib\idle.pyw"

it could be that you just said main{....I use int main{ when I start my main.

The easiest way to use it is as following:

currentISODate = new Date().parse("yyyy-MM-dd'T'HH:mm:ss", "2013-04-14T16:11:48.000");

where "yyyy-MM-dd'T'HH:mm:ss" is the format of the reading date

output: Sun Apr 14 16:11:48 EEST 2013

Notes: HH vs hh - HH refers to 24h time format - hh refers to 12h time format

You still have access to StreamWriter:

using (System.IO.StreamWriter file = new System.IO.StreamWriter(@"\hereIam.txt"))
{
    file.WriteLine(sb.ToString()); // "sb" is the StringBuilder
}

From the MSDN documentation: Writing to a Text File (Visual C#).

For newer versions of the .NET Framework (Version 2.0. onwards), this can be achieved with one line using the File.WriteAllText method.

System.IO.File.WriteAllText(@"C:\TextFile.txt", stringBuilder.ToString());

1. Copy and paste the form.
2. Rename the pasted form .cs to match the new form class name. This should auto rename other related files.
3. Open up .cs file. Change the class name and the name of the constructor(s) and destructor.
4. Open up .Designer.cs file and change the class name.

Extra Credit:

5. Consider abstracting common functionality from the form into common form or controls.

Try to use it via [ngClass] property:

<div class="button" [ngClass]="{active: isOn, disabled: isDisabled}"
         (click)="toggle(!isOn)">
         Click me!
     </div>`,

Using the package unglue we can do :

# install.packages("unglue")
library(unglue)

years<-c("20 years old", "1 years old")
unglue_vec(years, "{x} years old", convert = TRUE)
#> [1] 20  1

^{Created on 2019-11-06 by the reprex package (v0.3.0)}

More info: https://github.com/moodymudskipper/unglue/blob/master/README.md

This can not be done easily. There's no way to make an NVARCHAR parameter take "more than one value". What I've done before is - as you do already - make the parameter value like a list with comma-separated values. Then, split this string up into its parts in the stored procedure.

Splitting up can be done using string functions. Add every part to a temporary table. Pseudo-code for this could be:

CREATE TABLE #TempTable (ID INT)
WHILE LEN(@PortfolioID) > 0
BEGIN
    IF NOT <@PortfolioID contains Comma>
    BEGIN
        INSERT INTO #TempTable VALUES CAST(@PortfolioID as INT)
        SET @PortfolioID = ''
    END ELSE
    BEGIN
         INSERT INTO #Temptable VALUES CAST(<Part until next comma> AS INT)
         SET @PortfolioID = <Everything after the next comma>
    END
END

Then, change your condition to

WHERE PortfolioId IN (SELECT ID FROM #TempTable)

EDIT
You may be interested in the documentation for multi value parameters in SSRS, which states:

You can define a multivalue parameter for any report parameter that you create. However, if you want to pass multiple parameter values back to a data source by using the query, the following requirements must be satisfied:

The data source must be SQL Server, Oracle, Analysis Services, SAP BI NetWeaver, or Hyperion Essbase.

The data source cannot be a stored procedure. Reporting Services does not support passing a multivalue parameter array to a stored procedure.

The query must use an IN clause to specify the parameter.

This I found here.

Usually this happens if something is wrong with the byte array.

File.WriteAllBytes("filename.PDF", Byte[]);

This creates a new file, writes the specified byte array to the file, and then closes the file. If the target file already exists, it is overwritten.

Asynchronous implementation of this is also available.

public static System.Threading.Tasks.Task WriteAllBytesAsync 
(string path, byte[] bytes, System.Threading.CancellationToken cancellationToken = null);

To fix this, i put this class on the webpage

<style>                        
    td.vcenter {
        vertical-align: middle !important;
        text-align: center !important;
    }
</style>

and this in my TemplateField

<asp:TemplateField ItemStyle-CssClass="vcenter">

as the CSS class points directly to the td (tabledata) element and has the !important statment at the end each setting. It will over rule bootsraps CSS class settings.

Hope it helps

If you want to also allow alphanumeric characters which don't belong to the ascii characters set, like for instance german umlaut's, you can consider using the following solution:

 String value = "your value";

 // this could be placed as a static final constant, so the compiling is only done once
 Pattern pattern = Pattern.compile("[^\\w]", Pattern.UNICODE_CHARACTER_CLASS);

 value = pattern.matcher(value).replaceAll("");

Please note that the usage of the UNICODE_CHARACTER_CLASS flag could have an impose on performance penalty (see javadoc of this flag)

One approach is to combine the search strings into a regex pattern as in this answer.

Sohnee solutions is cleaner, but you can also try

window["bootbox"]

I think you are converting the data a bit more than you need to. Once you create the buffer with the proper encoding, you just need to write the buffer to the file.

var base64Data = req.rawBody.replace(/^data:image\/png;base64,/, "");

require("fs").writeFile("out.png", base64Data, 'base64', function(err) {
  console.log(err);
});

new Buffer(..., 'base64') will convert the input string to a Buffer, which is just an array of bytes, by interpreting the input as a base64 encoded string. Then you can just write that byte array to the file.

Update

As mentioned in the comments, req.rawBody is no longer a thing. If you are using express/connect then you should use the bodyParser() middleware and use req.body, and if you are doing this using standard Node then you need to aggregate the incoming data event Buffer objects and do this image data parsing in the end callback.

The most simple way:

>>> import re
>>> string = 'This is a string, with words!'
>>> re.findall(r'\w+', string)
['This', 'is', 'a', 'string', 'with', 'words']

The following example uses the GroupBy method to return objects that are grouped by PersonID.

var results = persons.GroupBy(x => x.PersonID)
              .Select(x => (PersonID: x.Key, Cars: x.Select(p => p.car).ToList())
              ).ToList();

Or

 var results = persons.GroupBy(
               person => person.PersonID,
               (key, groupPerson) => (PersonID: key, Cars: groupPerson.Select(x => x.car).ToList()));

Or

 var results = from person in persons
               group person by person.PersonID into groupPerson
               select (PersonID: groupPerson.Key, Cars: groupPerson.Select(x => x.car).ToList());

Or you can use ToLookup, Basically ToLookup uses EqualityComparer<TKey>.Default to compare keys and do what you should do manually when using group by and to dictionary. i think it's excuted inmemory

 ILookup<int, string> results = persons.ToLookup(
            person => person.PersonID,
            person => person.car);

I don't have enough reputation to comment, but if you like working with QT, they have their own version.

    #include <QtCore/qmath.h>
    qPow(x, y); // returns x raised to the y power.

Or if you aren't using QT, cmath has basically the same thing.

    #include <cmath>
    double x = 5, y = 7; //As an example, 5 ^ 7 = 78125
    pow(x, y); //Should return this: 78125

This can be achieved purely with JavaScript.

I see the answer I wanted to write has been answered by lynx in comments to the question.

But I'm going to write answer anyway because just like me, people sometimes forget to read the comments.

So, if you just want to get an element's distance (in Pixels) from the top of your screen window, here is what you need to do:

// Fetch the element
var el = document.getElementById("someElement");  

use getBoundingClientRect()

// Use the 'top' property of 'getBoundingClientRect()' to get the distance from top
var distanceFromTop = el.getBoundingClientRect().top; 

Thats it!

Hope this helps someone :)

Use sessions

On your search.jsp

Put your scard in sessions using session.setAttribute("scard","scard")

//the 1st variable is the string name that you will retrieve in ur next page,and the 2nd variable is the its value,i.e the scard value.

And in your next page you retrieve it using session.getAttribute("scard")

UPDATE

<input type="text" value="<%=session.getAttribute("scard")%>"/>

You can only return one value, but it can be an object that has multiple fields - ie a "value object". Eg

public class MyResult {
    int returnCode;
    String errorMessage;
    // etc
}

public MyResult someMethod() {
    // impl here
}

This worked for me

<LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:gravity="center"
        android:orientation="horizontal" >

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:contentDescription="@string/Logo"
            android:gravity="center"
            android:scaleType="centerInside"
            android:src="@drawable/logo" />

    </LinearLayout>

If you are working with ASP.NET MVC, you can solve the problem by adding the MaxJsonLength to your result:

var jsonResult = Json(new
{
    draw = param.Draw,
    recordsTotal = count,
    recordsFiltered = count,
    data = result
}, JsonRequestBehavior.AllowGet);
jsonResult.MaxJsonLength = int.MaxValue;

margin: 50%; 

You can adjust the percentage as needed. It seems to work for me in responsive emails.

You can apply the onload handler property when the page loads in js or jquery like this:-

$(document).ready(function(){
   var width = img.clientWidth;
   var height = img.clientHeight;

 });

What do you mean by impacts? Content will flow around a float. That's how they work.

If you want it to appear above your design, try setting:

z-index: 10;  
position: absolute;  
right: 0;  
top: 0;

Check file /etc/ssh/sshd_config for Port number. Make sure it is 22.

The essentials of your question are as follows.

Since you have Map and User models and you have defined ManyToManyField in Map model, if you want to get access to members of the Map then you have the option of map_instance.members.all() since you have defined members field. However, say you want to access all maps a user is a part of then what option do you have.

By default, Django provided you with user_instance.modelname_set.all() and this will translate to the user.map_set.all() in this case.

maps is much better than map_set.

related_name provides you an ability to let Django know how you are going to access Map from User model or in general how you can access reverse models which is the whole point in creating ManyToMany fields and using ORM in that sense.

I got it

Cells(1, 1).Value = StartDate
Cells(1, 1).NumberFormat = "dd/mm/yyyy"

Basically, I need to set the cell format, instead of setting the date.

this.$http.get('https://pokeapi.co/api/v2/pokemon')
.then(response => {
   if(response.status === 200)
   {
      this.usuarios = response.data.results.map(usuario => {
      return { name: usuario.name, url: usuario.url, captched: false } })
          }
    })
.catch( error => { console.log("Error al Cargar los Datos: " + error ) } )

This example might help someone:

Note "origin" is my alias for remote "What is on Github"
Note "mybranch" is my alias for my branch "what is local" that I'm syncing with github
--your branch name is 'master' if you didn't create one. However, I'm using the different name mybranch to show where the branch name parameter is used.

What exactly are my remote repos on github?

$ git remote -v
origin  https://github.com/flipmcf/Playground.git (fetch)
origin  https://github.com/flipmcf/Playground.git (push)

Add the "other github repository of the same code" - we call this a fork:

$ git remote add someOtherRepo https://github.com/otherUser/Playground.git

$git remote -v
origin  https://github.com/flipmcf/Playground.git (fetch)
origin  https://github.com/flipmcf/Playground.git (push)
someOtherRepo https://github.com/otherUser/Playground.git (push)
someOtherRepo https://github.com/otherUser/Playground.git (fetch)

make sure our local repo is up to date:

$ git fetch

Change some stuff locally. let's say file ./foo/bar.py

$ git status
# On branch mybranch
# Changes to be committed:
#   (use "git reset HEAD <file>..." to unstage)
#
#   modified:   foo/bar.py

Review my uncommitted changes

$ git diff mybranch
diff --git a/playground/foo/bar.py b/playground/foo/bar.py
index b4fb1be..516323b 100655
--- a/playground/foo/bar.py
+++ b/playground/foo/bar.py
@@ -1,27 +1,29 @@
- This line is wrong
+ This line is fixed now - yea!
+ And I added this line too.

Commit locally.

$ git commit foo/bar.py -m"I changed stuff"
[myfork 9f31ff7] I changed stuff
1 files changed, 2 insertions(+), 1 deletions(-)

Now, I'm different than my remote (on github)

$ git status
# On branch mybranch
# Your branch is ahead of 'origin/mybranch' by 1 commit.
#
nothing to commit (working directory clean)

Diff this with remote - your fork: (this is frequently done with git diff master origin)

$ git diff mybranch origin
diff --git a/playground/foo/bar.py b/playground/foo/bar.py
index 516323b..b4fb1be 100655
--- a/playground/foo/bar.py
+++ b/playground/foo/bar.py
@@ -1,27 +1,29 @@
- This line is wrong
+ This line is fixed now - yea!
+ And I added this line too.

(git push to apply these to remote)

How does my remote branch differ from the remote master branch?

$ git diff origin/mybranch origin/master

How does my local stuff differ from the remote master branch?

$ git diff origin/master

How does my stuff differ from someone else's fork, master branch of the same repo?

$git diff mybranch someOtherRepo/master

Matthew Johnson's one-liner solution to get the one-liner date and time is eloquent and useful.

It does however need a simple modification to work from within a batch file:

for /f "tokens=2,3,4,5,6 usebackq delims=:/ " %%a in ('%date% %time%') do echo %%c-%%a-%%b %%d%%e

Try this (Do copy and paste):

Test.html:-

<html>
 <link rel="stylesheet" type="text/css" href="style.css">
 <a class="fruit" href="#">Home</a></span>
 <a class="fruit"  href="#">About</a></span>
 <a class="fruit"  href="#">Contact</a></span>
</html>

style.css:-

a:link{
 color:blue;
}

a:visited{
 color:purple;
}

a:hover{
 color:orange;
}
a:focus{
color:green;
}

a:active{
 color:red;
}

a:active{
 color:yellow;
}

Performing a lock: Quite cheap (still more expensive than a null test).

Performing a lock when another thread has it: You get the cost of whatever they've still to do while locking, added to your own time.

Performing a lock when another thread has it, and dozens of other threads are also waiting on it: Crippling.

For performance reasons, you always want to have locks that another thread wants, for the shortest period of time at all possible.

Of course it's easier to reason about "broad" locks than narrow, so it's worth starting with them broad and optimising as needed, but there are some cases that we learn from experience and familiarity where a narrower fits the pattern.

(Incidentally, if you can possibly just use private static volatile Singleton instance = new Singleton() or if you can possibly just not use singletons but use a static class instead, both are better in regards to these concerns).

Use LEFT JOIN

SELECT  a.*
FROM    table1 a
            LEFT JOIN table2 b
                on a.ID = b.ID
WHERE   b.id IS NULL

In my project I have Gradle task for integration test in sub-module:

task intTest(type: Test) {
...
system.properties System.properties 
...

this is the main point to inject all your system params into test environment. So, now you can run gradle like this to pass param with ABC value and use its value by ${param} in your code

gradle :some-service:intTest -Dparam=ABC

You will need to read the bytes from that File into a byte[] and put that object into your JSONObject.

You should also have a look at the following posts :

• ByteArray in JSON
• Binary Data in JSON String. Something better than Base64
• BSON library for java

Hope this helps.

Simply use

SELECT @@VERSION

Sample output

Microsoft SQL Server 2012 - 11.0.2100.60 (X64) 
Feb 10 2012 19:39:15 
Copyright (c) Microsoft Corporation
Express Edition (64-bit) on Windows NT 6.2 <X64> (Build 9200: )

Source: How to check sql server version? (Various ways explained)

if you're under apache, just add an .htaccess file to your directory with this content:

Header set Access-Control-Allow-Origin: *

Header set Access-Control-Allow-Headers: content-type

Header set Access-Control-Allow-Methods: *

You can use sp_help in SQL Server 2008.

sp_help <table_name>;

Keyboard shortcut for the above command: select table name (i.e highlight it) and press ALT+F1.

Just remove the .val(). Like:

if ( $('html').attr('lang') == 'fr-FR' ) {
    // do this
} else {
    // do that
}

Try this solution if works.

window.onkeypress = function(e) {
    if ((e.which || e.keyCode) == 116) {
        alert("fresh");
    }
}

Look for this on your Manifest.xml android:icon="@drawable/ic_launcher" then change the ic_launcher to the name of your icon which is on your @drawable folder.

Here is an example of creating a data migration script using a cursor to iterate the source table.

SET NOCOUNT ON;  
DECLARE @out nvarchar(max) = ''
DECLARE @row nvarchar(1024)
DECLARE @first int = 1

DECLARE cur CURSOR FOR 
    SELECT '(' + CONVERT(CHAR(1),[Stage]) + ',''' + [Label] + ''')'
    FROM CV_ORDER_STATUS
    ORDER BY [Stage]

PRINT 'SET IDENTITY_INSERT dbo.CV_ORDER_STATUS ON'
PRINT 'GO'

PRINT 'INSERT INTO dbo.CV_ORDER_STATUS ([Stage],[Label]) VALUES';

OPEN cur
FETCH NEXT FROM cur
    INTO @row

WHILE @@FETCH_STATUS = 0
BEGIN
    IF @first = 1
        SET @first = 0
    ELSE
        SET @out = @out + ',' + CHAR(13);

    SET @out = @out + @row

    FETCH NEXT FROM cur into @row
END

CLOSE cur
DEALLOCATE cur

PRINT @out

PRINT 'SET IDENTITY_INSERT dbo.CV_ORDER_STATUS OFF'
PRINT 'GO'

int opcion = JOptionPane.showConfirmDialog(null, "Realmente deseas salir?", "Aviso", JOptionPane.YES_NO_OPTION);

if (opcion == 0) { //The ISSUE is here
   System.out.print("si");
} else {
   System.out.print("no");
}

• I happen to like leading underscores for (private) instance variables, it seems easier to read and distinguish.Of course this thing can get you into trouble with edge cases (e.g. public instance variables (not common, I know) - either way you name them you're arguably breaking your naming convention:
• private int _my_int; public int myInt;? _my_int? )

-as much as I like the _style of this and think it's readable I find it's arguably more trouble than it's worth, as it's uncommon and it's likely not to match anything else in the codebase you're using.

-automated code generation (e.g. eclipse's generate getters, setters) aren't likely to understand this so you'll have to fix it by hand or muck with eclipse enough to get it to recognize.

Ultimately, you're going against the rest of the (java) world's prefs and are likely to have some annoyances from that. And as previous posters have mentioned, consistency in the codebase trumps all of the above issues.

You can use np.logaddexp (which implements the idea in @gg349's answer):

In [33]: d = np.array([[1089, 1093]])

In [34]: e = np.array([[1000, 4443]])

In [35]: log_res = np.logaddexp(-3*d[0,0], -3*d[0,1]) - np.logaddexp(-3*e[0,0], -3*e[0,1])

In [36]: log_res
Out[36]: -266.99999385580668

In [37]: res = exp(log_res)

In [38]: res
Out[38]: 1.1050349147204485e-116

Or you can use scipy.special.logsumexp:

In [52]: from scipy.special import logsumexp

In [53]: res = np.exp(logsumexp(-3*d) - logsumexp(-3*e))

In [54]: res
Out[54]: 1.1050349147204485e-116

This is perfect answer of your problem

  <LinearLayout 
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content"
        android:orientation="horizontal"  >   
     <Button 
        android:text="Register" android:id="@+id/register"
        android:layout_width="wrap_content" android:layout_height="wrap_content"
        android:padding="10dip" weight="1" />
     <Button 
        android:text="Not this time" android:id="@+id/cancel"
        android:layout_width="wrap_content" android:layout_height="wrap_content"
        android:padding="10dip" weight="1" />
  </LinearLayout>

By default a span is an inline element... so that's not the default behavior.

You can make the span behave that way by adding display: block; to your CSS.

span {
    display: block;
    width: 100px;
}

You can use str.isalpha().

For example:

s = 'a123b'

for char in s:
    print(char, char.isalpha())

Output:

a True
1 False
2 False
3 False
b True

inelegant (but effective) way: use percentages

#horizontal-style {
    width: 100%;
}

li {
    width: 20%;
}

This only works with the 5 <li> example. For more or less, modify your percentage accordingly. If you have other <li>s on your page, you can always assign these particular ones a class of "menu-li" so that only they are affected.

My ES6 variant produces a string like this 2020-04-05_16:39:45.85725. Feel free to modify the return statement to get the format that you need:

const getDateStringServ = timestamp => {

  const plus0 = num => `0${num.toString()}`.slice(-2)

  const d = new Date(timestamp)

  const year = d.getFullYear()
  const monthTmp = d.getMonth() + 1
  const month = plus0(monthTmp)
  const date = plus0(d.getDate())
  const hour = plus0(d.getHours())
  const minute = plus0(d.getMinutes())
  const second = plus0(d.getSeconds())
  const rest = timestamp.toString().slice(-5)

  return `${year}-${month}-${date}_${hour}:${minute}:${second}.${rest}`
}

I found in my specific case that I just needed to trim the content. Maybe not the answer asked in the question. But I thought I should add this answer anyway.

$(myContent).text().trim()

I have a Samsung Galaxy Tab 2 7.0 with Android 4.1.1. Apparently it does NOT sync to ntp. I loaded an app that says my tablet is 20 seconds off of ntp, but it can't set it unless I root the device.

Since you should focus on usability and generalities in CSS, rather than use an id to point to a specific layout element (which results in huge or multiple css files) you should probably instead use a true class in your linked .css file:

.hidden {
visibility: hidden;
display: none;
}

or for the minimalist:

.hidden {
display: none;
}

Now you can simply apply it via:

<div class="hidden"> content </div>

Solution can be done be this way:

1. Just assign the value to Integer
2. Make variable to final

Example:

public static final int cameraRequestCode = 999;

Hope this will help you.

My recommendation? Don't use jQuery at all. I had the same problem as you. I found that $('#my_input').val() always return some weird result.

Try to use document.getElementById('my_input').valueAsNumber instead of $("#my_input").val(); and then, use Number(your_value_retrieved) to try to create a Number. If the value is NaN, you know certainly that that's not a number.

One thing to add is when you write a number on the input, the input will actually accept almost any character (I can write the euro sign, a dollar, and all of other special characters), so it is best to retrieve the value using .valueAsNumber instead of using jQuery.

Oh, and BTW, that allows your users to add internationalization (i.e.: support commas instead of dots to create decimal numbers). Just let the Number() object to create something for you and it will be decimal-safe, so to speak.

An easy way to do this:

d = {2:3, 1:89, 4:5, 3:0}

s = {k : d[k] for k in sorted(d)}

s

Out[1]: {1: 89, 2: 3, 3: 0, 4: 5} 

From Django docs :

To handle both of these situations, Django has a consistent way of processing filter() calls. Everything inside a single filter() call is applied simultaneously to filter out items matching all those requirements. Successive filter() calls further restrict the set of objects, but for multi-valued relations, they apply to any object linked to the primary model, not necessarily those objects that were selected by an earlier filter() call.

• It is clearly said that multiple conditions in a single filter() are applied simultaneously. That means that doing :

objs = Mymodel.objects.filter(a=True, b=False)

will return a queryset with raws from model Mymodel where a=True AND b=False.

• Successive filter(), in some case, will provide the same result. Doing :

objs = Mymodel.objects.filter(a=True).filter(b=False)

will return a queryset with raws from model Mymodel where a=True AND b=False too. Since you obtain "first" a queryset with records which have a=True and then it's restricted to those who have b=False at the same time.

• The difference in chaining filter() comes when there are multi-valued relations, which means you are going through other models (such as the example given in the docs, between Blog and Entry models). It is said that in that case (...) they apply to any object linked to the primary model, not necessarily those objects that were selected by an earlier filter() call.

Which means that it applies the successives filter() on the target model directly, not on previous filter()

If I take the example from the docs :

Blog.objects.filter(entry__headline__contains='Lennon').filter(entry__pub_date__year=2008)

remember that it's the model Blog that is filtered, not the Entry. So it will treat the 2 filter() independently.

It will, for instance, return a queryset with Blogs, that have entries that contain 'Lennon' (even if they are not from 2008) and entries that are from 2008 (even if their headline does not contain 'Lennon')

THIS ANSWER goes even further in the explanation. And the original question is similar.

You can cast null to any reference type without getting any exception.

The println method does not throw null pointer because it first checks whether the object is null or not. If null then it simply prints the string "null". Otherwise it will call the toString method of that object.

Adding more details: Internally print methods call String.valueOf(object) method on the input object. And in valueOf method, this check helps to avoid null pointer exception:

return (obj == null) ? "null" : obj.toString();

For rest of your confusion, calling any method on a null object should throw a null pointer exception, if not a special case.

2019 answer:

Using CSS grid:

.parent {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: 1fr;
}

brew rmtree doesn't work at all. From the links on that issue I found rmrec which actually does work. God knows why brew doesn't have this as a native command.

brew tap ggpeti/rmrec
brew rmrec pkgname

When is del useful in python?

You can use it to remove a single element of an array instead of the slice syntax x[i:i+1]=[]. This may be useful if for example you are in os.walk and wish to delete an element in the directory. I would not consider a keyword useful for this though, since one could just make a [].remove(index) method (the .remove method is actually search-and-remove-first-instance-of-value).

I hope following program will solve your problem

String dateStr = "Mon Jun 18 00:00:00 IST 2012";
DateFormat formatter = new SimpleDateFormat("E MMM dd HH:mm:ss Z yyyy");
Date date = (Date)formatter.parse(dateStr);
System.out.println(date);        

Calendar cal = Calendar.getInstance();
cal.setTime(date);
String formatedDate = cal.get(Calendar.DATE) + "/" + (cal.get(Calendar.MONTH) + 1) + "/" +         cal.get(Calendar.YEAR);
System.out.println("formatedDate : " + formatedDate);    

This is a textbook case for a constructor function:

var myArray = [];

function myElement(id, value){
    this.id = id
    this.value = value
}

myArray[0] = new myElement(0,1)
myArray[1] = new myElement(2,3)
// or myArray.push(new myElement(1, 1))

Just in case you guys need it, Here a couple of links that can help you:

1. download csv file from web api in angular js
2. Export javascript data to CSV file without server interaction

Cheers

Underscore has a _without() method perfect for removing an item from an array, especially if you have the object to remove.

Returns a copy of the array with all instances of the values removed.

_.without(["bob", "sam", "fred"], "sam");

=> ["bob", "fred"]

Works with more complex objects too.

var bob = { Name: "Bob", Age: 35 };
var sam = { Name: "Sam", Age: 19 };
var fred = { Name: "Fred", Age: 50 };

var people = [bob, sam, fred]

_.without(people, sam);

=> [{ Name: "Bob", Age: 35 }, { Name: "Fred", Age: 50 }];

If you don't have the item to remove, just a property of it, you can use _.findWhere and then _.without.

The following method works in IE11+, Firefox 25+ and Chrome 30+:

<a id="export" class="myButton" download="" href="#">export</a>
<script>
    function createDownloadLink(anchorSelector, str, fileName){
        if(window.navigator.msSaveOrOpenBlob) {
            var fileData = [str];
            blobObject = new Blob(fileData);
            $(anchorSelector).click(function(){
                window.navigator.msSaveOrOpenBlob(blobObject, fileName);
            });
        } else {
            var url = "data:text/plain;charset=utf-8," + encodeURIComponent(str);
            $(anchorSelector).attr("download", fileName);               
            $(anchorSelector).attr("href", url);
        }
    }

    $(function () {
        var str = "hi,file";
        createDownloadLink("#export",str,"file.txt");
    });

</script>

See this in Action: http://jsfiddle.net/Kg7eA/

Firefox and Chrome support data URI for navigation, which allows us to create files by navigating to a data URI, while IE doesn't support it for security purposes.

On the other hand, IE has API for saving a blob, which can be used to create and download files.

If you want to notify the user/take action whenever a network/connection change occur.
Use NLM API:

• https://msdn.microsoft.com/en-us/library/ee264321.aspx

• http://www.codeproject.com/Articles/34650/How-to-use-the-Windows-NLM-API-to-get-notified-of

I try lots of ways and finally try this:

def db_persist(func):
    def persist(*args, **kwargs):
        func(*args, **kwargs)
        try:
            session.commit()
            logger.info("success calling db func: " + func.__name__)
            return True
        except SQLAlchemyError as e:
            logger.error(e.args)
            session.rollback()
            return False

    return persist

and :

@db_persist
def insert_or_update(table_object):
    return session.merge(table_object)

For updating a record:

 UPDATE Employees SET [Photo] = (SELECT
 MyImage.* from Openrowset(Bulk
 'C:\photo.bmp', Single_Blob) MyImage)
 where Id = 10

Notes:

• Make sure to add the 'BULKADMIN' Role Permissions for the login you are using.
• Paths are not pointing to your computer when using SQL Server Management Studio. If you start SSMS on your local machine and connect to a SQL Server instance on server X, the file C:\photo.bmp will point to hard drive C: on server X, not your machine!

I wanted to just be able to break out of a block - sort of like a forward goto, not really related to a loop. In fact, I want to break of of a block that is in a loop without terminating the loop. To do that, I made the block a one-iteration loop:

for b in 1..2 do
    puts b
    begin
        puts 'want this to run'
        break
        puts 'but not this'
    end while false
    puts 'also want this to run'
end

Hope this helps the next googler that lands here based on the subject line.

Table Positioning

Available Parameters

A table can easily be placed with the following parameters:

• h Place the float here, i.e., approximately at the same point it occurs in the source text (however, not exactly at the spot)
• t Position at the top of the page.
• b Position at the bottom of the page.
• p Put on a special page for floats only.
• ! Override internal parameters LaTeX uses for determining "good" float positions.
• H Places the float at precisely the location in the LATEX code. Requires the float package. This is somewhat equivalent to h!.

If you want to make use of H (or h!) for an exact positioning, make sure you got the float package correctly set up in the preamble:

\usepackage{float}
\restylefloat{table}

Example

If you want to place the table at the same page, either at the exact place or at least at the top of the page (what fits best for the latex engine), use the parameters h and t like this:

\begin{table}[ht]
    table content ...
\end{table}

Sources: Overleaf.com

The response headers in case of cors remain hidden. You need to add in response headers to direct the Angular to expose headers to javascript.

// From server response headers :
header("Access-Control-Allow-Methods: GET, POST, OPTIONS");
header("Access-Control-Allow-Headers: Origin, X-Requested-With, 
Content-Type, Accept, Authorization, X-Custom-header");
header("Access-Control-Expose-Headers: X-Custom-header");
header("X-Custom-header: $some data");

var data = res.headers.get('X-Custom-header');

Source : https://github.com/angular/angular/issues/5237

For those people using Python, you might consider Selenium Wire, a library for inspecting requests made by the browser during a test.

You get access to requests via the driver.requests attribute:

from seleniumwire import webdriver  # Import from seleniumwire

# Create a new instance of the Firefox driver
driver = webdriver.Firefox()

# Go to the Google home page
driver.get('https://www.google.com')

# Access requests via the `requests` attribute
for request in driver.requests:
    if request.response:
        print(
            request.url,
            request.response.status_code,
            request.response.headers['Content-Type']
        )

Prints:

https://www.google.com/ 200 text/html; charset=UTF-8
https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_120x44dp.png 200 image/png
https://consent.google.com/status?continue=https://www.google.com&pc=s&timestamp=1531511954&gl=GB 204 text/html; charset=utf-8
https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_272x92dp.png 200 image/png
https://ssl.gstatic.com/gb/images/i2_2ec824b0.png 200 image/png
https://www.google.com/gen_204?s=webaft&t=aft&atyp=csi&ei=kgRJW7DBONKTlwTK77wQ&rt=wsrt.366,aft.58,prt.58 204 text/html; charset=UTF-8
...

The library gives you the ability to access headers, status code, body content, as well as the ability to modify headers and rewrite URLs.

Not necessarily true. It will be encrypted on the wire however it still lands in the logs plain text

In layman terms:- JDK = JRE + Development/debugging tools, where JDK is our complete package to work with Java, from creating compiling till running it.On the other hand JRE is just of running of code(Byte Code).

Note:- Whether we are installing JDK or JRE, JVM would come bundled with both the packages and JVM is the part where JIT compiler converts the byte code into the machine specific code.

Just read the article on JDK,JRE ,JVM and JIT

If you are migrating to 1.0.0 you need to change the following properties.

In the Project's build.gradle file you need to replace minifyEnabled.

Hence your new build type should be

buildTypes {
    release {
        minifyEnabled true
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'        
    }
}

Also make sure that gradle version is 1.0.0 like

classpath 'com.android.tools.build:gradle:1.0.0'

in the build.gradle file.

This should solve the problem.

Source: http://tools.android.com/tech-docs/new-build-system/migrating-to-1-0-0

In JavaScript, most functions are both callable and instantiable: they have both a [[Call]] and [[Construct]] internal methods.

As callable objects, you can use parentheses to call them, optionally passing some arguments. As a result of the call, the function can return a value.

var player = makeGamePlayer("John Smith", 15, 3);

The code above calls function makeGamePlayer and stores the returned value in the variable player. In this case, you may want to define the function like this:

function makeGamePlayer(name, totalScore, gamesPlayed) {
  // Define desired object
  var obj = {
    name:  name,
    totalScore: totalScore,
    gamesPlayed: gamesPlayed
  };
  // Return it
  return obj;
}

Additionally, when you call a function you are also passing an additional argument under the hood, which determines the value of this inside the function. In the case above, since makeGamePlayer is not called as a method, the this value will be the global object in sloppy mode, or undefined in strict mode.

As constructors, you can use the new operator to instantiate them. This operator uses the [[Construct]] internal method (only available in constructors), which does something like this:

1. Creates a new object which inherits from the .prototype of the constructor
2. Calls the constructor passing this object as the this value
3. It returns the value returned by the constructor if it's an object, or the object created at step 1 otherwise.

var player = new GamePlayer("John Smith", 15, 3);

The code above creates an instance of GamePlayer and stores the returned value in the variable player. In this case, you may want to define the function like this:

function GamePlayer(name,totalScore,gamesPlayed) {
  // `this` is the instance which is currently being created
  this.name =  name;
  this.totalScore = totalScore;
  this.gamesPlayed = gamesPlayed;
  // No need to return, but you can use `return this;` if you want
}

By convention, constructor names begin with an uppercase letter.

The advantage of using constructors is that the instances inherit from GamePlayer.prototype. Then, you can define properties there and make them available in all instances

Just set the empty values to the input fields when modal is hiding.

$('#Modal_Id').on('hidden', function () {
   $('#Form_Id').find('input[type="text"]').val('');
});

as others said Calendar.MONTH returns int and is zero indexed.

to get the current month as a String use SimpleDateFormat.format() method

Calendar cal = Calendar.getInstance();
System.out.println(new SimpleDateFormat("MMM").format(cal.getTime()));

returns NOV

import time
time.sleep(5)   # Delays for 5 seconds. You can also use a float value.

Here is another example where something is run approximately once a minute:

import time
while True:
    print("This prints once a minute.")
    time.sleep(60) # Delay for 1 minute (60 seconds).

If you have this error in console ([$injector:nomod], MINERR_ASSET:22), make sure you are not including your application code before loading AngularJS

I was doing that and once I fixed the order, the error went away.

web.py is probably the simplest web framework out there. "Bare" CGI is simpler, but you're completely on your own when it comes to making a service that actually does something.

"Hello, World!" according to web.py isn't much longer than an bare CGI version, but it adds URL mapping, HTTP command distinction, and query parameter parsing for free:

import web

urls = (
    '/(.*)', 'hello'
)
app = web.application(urls, globals())

class hello:        
    def GET(self, name):
        if not name: 
            name = 'world'
        return 'Hello, ' + name + '!'

if __name__ == "__main__":
    app.run()

ERROR :

ORA-00604: error occurred at recursive SQL level 1 ORA-01882: timezone region not found

Solution: CIM setup in Centos.

/opt/oracle/product/ATG/ATG11.2/home/bin/dynamoEnv.sh

Add this java arguments:

JAVA_ARGS="${JAVA_ARGS} -Duser.timezone=EDT"

if (($value >= 1 && $value <= 10) || ($value >= 20 && $value <= 40)) {
   // A value between 1 to 10, or 20 to 40.
}

You must use some of the C # conversion systems:

string to boolean: True to true

string str = "True";
bool mybool = System.Convert.ToBoolean(str);

boolean to string: true to True

bool mybool = true;
string str = System.Convert.ToString(mybool);

//or

string str = mybool.ToString();

bool.Parse expects one parameter which in this case is str, even .

Convert.ToBoolean expects one parameter.

bool.TryParse expects two parameters, one entry (str) and one out (result).

If TryParse is true, then the conversion was correct, otherwise an error occurred

string str = "True";
bool MyBool = bool.Parse(str);

//Or

string str = "True";
if(bool.TryParse(str, out bool result))
{
   //Correct conversion
}
else
{
     //Incorrect, an error has occurred
}

My requirement was to view the content of a file (like a property file) inside the jar, without actually extracting the jar. If anyone reached this thread just like me, try this command -

unzip -p myjar.jar myfile.txt

This worked well for me!

  File "C:\pythonwork\readthefile080410.py", line 120, in medications_minimum3
    counter[row[11]]+=1
TypeError: unhashable type: 'list'

row[11] is unhashable. It's a list. That is precisely (and only) what the error message means. You might not like it, but that is the error message.

Do this

counter[tuple(row[11])]+=1

Also, simplify.

d= [ row for row in c if counter[tuple(row[11])]>=sample_cutoff ]

Simple and powerful way(dynamic validation)

place formats in array like "image/*"

var upload=document.getElementById("upload");
var array=["video/mp4","image/png"];
upload.accept=array;
upload.addEventListener("change",()=>{

console.log(upload.value)
})

<input type="file" id="upload" >

use a "not exists" left join:

SELECT p.*
FROM primary_table p LEFT JOIN second s ON p.ID = s.ID
WHERE s.ID IS NULL

You cannot pass custom parameters in addTarget:.One alternative is set the tag property of button and do work based on the tag.

button.tag = 5
button.addTarget(self, action: "buttonClicked:", 
    forControlEvents: UIControlEvents.TouchUpInside)

Or for Swift 2.2 and greater:

button.tag = 5
button.addTarget(self,action:#selector(buttonClicked),
    forControlEvents:.TouchUpInside)

Now do logic based on tag property

@objc func buttonClicked(sender:UIButton)
{
    if(sender.tag == 5){

        var abc = "argOne" //Do something for tag 5
    }
    print("hello")
}

I don't know of any out-of-the-box way to achieve this. As you say, this is not how SharePoint lists are intended used. It might work to create a custom site column displaying the path to the document, as this might be used in a filter. Have never tried it, though.

Here's a simple, pure-Python implementation. It should be used when performance is not critical (included for future Googlers).

import string
allowed = set(string.ascii_lowercase + string.digits + '.')

def check(test_str):
    set(test_str) <= allowed

Regarding performance, iteration will probably be the fastest method. Regexes have to iterate through a state machine, and the set equality solution has to build a temporary set. However, the difference is unlikely to matter much. If performance of this function is very important, write it as a C extension module with a switch statement (which will be compiled to a jump table).

Here's a C implementation, which uses if statements due to space constraints. If you absolutely need the tiny bit of extra speed, write out the switch-case. In my tests, it performs very well (2 seconds vs 9 seconds in benchmarks against the regex).

#define PY_SSIZE_T_CLEAN
#include <Python.h>

static PyObject *check(PyObject *self, PyObject *args)
{
        const char *s;
        Py_ssize_t count, ii;
        char c;
        if (0 == PyArg_ParseTuple (args, "s#", &s, &count)) {
                return NULL;
        }
        for (ii = 0; ii < count; ii++) {
                c = s[ii];
                if ((c < '0' && c != '.') || c > 'z') {
                        Py_RETURN_FALSE;
                }
                if (c > '9' && c < 'a') {
                        Py_RETURN_FALSE;
                }
        }

        Py_RETURN_TRUE;
}

PyDoc_STRVAR (DOC, "Fast stringcheck");
static PyMethodDef PROCEDURES[] = {
        {"check", (PyCFunction) (check), METH_VARARGS, NULL},
        {NULL, NULL}
};
PyMODINIT_FUNC
initstringcheck (void) {
        Py_InitModule3 ("stringcheck", PROCEDURES, DOC);
}

Include it in your setup.py:

from distutils.core import setup, Extension
ext_modules = [
    Extension ('stringcheck', ['stringcheck.c']),
],

Use as:

>>> from stringcheck import check
>>> check("abc")
True
>>> check("ABC")
False

It depends what kind of UUID you want.

• The standard Java UUID class generates Version 4 (random) UUIDs. (UPDATE - Version 3 (name) UUIDs can also be generated.) It can also handle other variants, though it cannot generate them. (In this case, "handle" means construct UUID instances from long, byte[] or String representations, and provide some appropriate accessors.)

• The Java UUID Generator (JUG) implementation purports to support "all 3 'official' types of UUID as defined by RFC-4122" ... though the RFC actually defines 4 types and mentions a 5th type.

For more information on UUID types and variants, there is a good summary in Wikipedia, and the gory details are in RFC 4122 and the other specifications.

var str   = 'asd-0.testing';
var regex = /(asd-)\d(\.\w+)/;
str = str.replace(regex, "$11$2");
console.log(str);

Or if you're sure there won't be any other digits in the string:

var str   = 'asd-0.testing';
var regex = /\d/;
str = str.replace(regex, "1");
console.log(str);

Using this approach with Response.js is better. Response.resize triggers on every window resize where crossover will only be triggered if breakpoint is changed

Response.create({
    prop : "width",
    breakpoints : [1200, 992, 768, 480, 320, 0]
});

Response.crossover('width', function() {
    if (Response.band(1200)) {
        // 1200+

    } else if (Response.band(992)) {
        // 992+

    } else if (Response.band(768)) {
        // 768+

    } else if (Response.band(480)) {
        //480+

    } else {
        // 0->320

    }
});

Response.ready(function() {
    $(window).trigger('resize');
});

From http://bugs.jqueryui.com/ticket/9019

Putting HTML within the title attribute is not valid HTML and we are now escaping it to prevent XSS vulnerabilities (see #8861).

If you need HTML in your tooltips use the content option - http://api.jqueryui.com/tooltip/#option-content.

Try to use javascript to set html tooltips, see below

$( ".selector" ).tooltip({
   content: "Here is your HTML"
});

If you want to run a script to a database:

mysql -u user -p data_base_name_here < db.sql

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).

Use the StringUtils class, it also includes null check

StringUtils.leftPad(String str, int size)
StringUtils.rightPad(String str, int size)

>>> s = 'sdsd'
>>> s.upper()
'SDSD'

See String Methods.

Here is a simple mathed to pass values from a route provider

//Route Provider
$routeProvider.when("/page/:val1/:val2/:val3",{controller:pageCTRL, templateUrl: 'pages.html'});


//Controller
$http.get( 'page.php?val1='+$routeParams.val1 +'&val2='+$routeParams.val2 +'&val3='+$routeParams.val3 , { cache: true})
        .then(function(res){
            //....
        })

In Python 3.8+ you can use .read() in a while loop:

with open("somefile.txt") as f:
    while chunk := f.read(8192):
        do_something(chunk)

Of course, you can use any chunk size you want, you don't have to use 8192 (2**13) bytes. Unless your file's size happens to be a multiple of your chunk size, the last chunk will be smaller than your chunk size.

I also had this issue while developping on HTML5 in local. I had issues with images and getImageData function. Finally, I discovered one can launch chrome with the --allow-file-access-from-file command switch, that get rid of this protection security. The only thing is that it makes your browser less safe, and you can't have one chrome instance with the flag on and another without the flag.

(left, upper, right, lower) means two points,

1. (left, upper)
2. (right, lower)

with an 800x600 pixel image, the image's left upper point is (0, 0), the right lower point is (800, 600).

So, for cutting the image half:

from PIL import Image
img = Image.open("ImageName.jpg")

img_left_area = (0, 0, 400, 600)
img_right_area = (400, 0, 800, 600)

img_left = img.crop(img_left_area)
img_right = img.crop(img_right_area)

img_left.show()
img_right.show()

Coordinate System

The Python Imaging Library uses a Cartesian pixel coordinate system, with (0,0) in the upper left corner. Note that the coordinates refer to the implied pixel corners; the centre of a pixel addressed as (0, 0) actually lies at (0.5, 0.5).

Coordinates are usually passed to the library as 2-tuples (x, y). Rectangles are represented as 4-tuples, with the upper left corner given first. For example, a rectangle covering all of an 800x600 pixel image is written as (0, 0, 800, 600).

keyPressed - when the key goes down
keyReleased - when the key comes up
keyTyped - when the unicode character represented by this key is sent by the keyboard to system input.

I personally would use keyReleased for this. It will fire only when they lift their finger up.

Note that keyTyped will only work for something that can be printed (I don't know if F5 can or not) and I believe will fire over and over again if the key is held down. This would be useful for something like... moving a character across the screen or something.

Using Scanner in some cases is a very convenient way of extracting numbers from a string. And it is almost as powerful as NumberFormatter when it comes to decoding and dealing with different number formats and locales. It can extract numbers and currencies with different decimal and group separators.

import Foundation
// The code below includes manual fix for whitespaces (for French case)
let strings = ["en_US": "My salary is $9,999.99",
               "fr_FR": "Mon salaire est 9 999,99€",
               "de_DE": "Mein Gehalt ist 9999,99€",
               "en_GB": "My salary is £9,999.99" ]
// Just for referce
let allPossibleDecimalSeparators = Set(Locale.availableIdentifiers.compactMap({ Locale(identifier: $0).decimalSeparator}))
print(allPossibleDecimalSeparators)
for str in strings {
    let locale = Locale(identifier: str.key)
    let valStr = str.value.filter{!($0.isWhitespace || $0 == Character(locale.groupingSeparator ?? ""))}
    print("Value String", valStr)

    let sc = Scanner(string: valStr)
    // we could do this more reliably with `filter` as well
    sc.charactersToBeSkipped = CharacterSet.decimalDigits.inverted
    sc.locale = locale

    print("Locale \(locale.identifier) grouping separator: |\(locale.groupingSeparator ?? "")| . Decimal separator: \(locale.decimalSeparator ?? "")")
    while !(sc.isAtEnd) {
        if let val = sc.scanDouble() {
            print(val)
        }

    }
}

However, there are issues with separators that could be conceived as word delimiters.

// This doesn't work. `Scanner` just ignores grouping separators because scanner tends to seek for multiple values
// It just refuses to ignore spaces or commas for example.
let strings = ["en_US": "$9,999.99", "fr_FR": "9999,99€", "de_DE": "9999,99€", "en_GB": "£9,999.99" ]
for str in strings {
    let locale = Locale(identifier: str.key)
    let sc = Scanner(string: str.value)
    sc.charactersToBeSkipped = CharacterSet.decimalDigits.inverted.union(CharacterSet(charactersIn: locale.groupingSeparator ?? ""))
    sc.locale = locale
    print("Locale \(locale.identifier) grouping separator: \(locale.groupingSeparator ?? "") . Decimal separator: \(locale.decimalSeparator ?? "")")
    while !(sc.isAtEnd) {
        if let val = sc.scanDouble() {
            print(val)
        }

    }
}
//     sc.scanDouble(representation: Scanner.NumberRepresentation) could help if there were .currency case

There is no problem to auto detect locale. Note that groupingSeparator in French locale in string "Mon salaire est 9 999,99€" is not a space, though it may render exactly as space (here it doesn't). Thats why the code below works fine without !$0.isWhitespace characters being filtered out.

let stringsArr = ["My salary is $9,999.99",
                  "Mon salaire est 9 999,99€",
                  "Mein Gehalt ist 9.999,99€",
                  "My salary is £9,999.99" ]

let tagger = NSLinguisticTagger(tagSchemes: [.language], options: Int(NSLinguisticTagger.Options.init().rawValue))
for str in stringsArr {
    tagger.string = str
    let locale = Locale(identifier: tagger.dominantLanguage ?? "en")
    let valStr = str.filter{!($0 == Character(locale.groupingSeparator ?? ""))}
    print("Value String", valStr)

    let sc = Scanner(string: valStr)
    // we could do this more reliably with `filter` as well
    sc.charactersToBeSkipped = CharacterSet.decimalDigits.inverted
    sc.locale = locale

    print("Locale \(locale.identifier) grouping separator: |\(locale.groupingSeparator ?? "")| . Decimal separator: \(locale.decimalSeparator ?? "")")
    while !(sc.isAtEnd) {
        if let val = sc.scanDouble() {
            print(val)
        }

    }
}
// Also will fail if groupingSeparator == decimalSeparator (but don't think it's possible)

Just use this:

List<SomeBean> newList = new ArrayList<SomeBean>(otherList);

Note: still not thread safe, if you modify otherList from another thread, then you may want to make that otherList (and even newList) a CopyOnWriteArrayList, for instance -- or use a lock primitive, such as ReentrantReadWriteLock to serialize read/write access to whatever lists are concurrently accessed.

line.strip() == ''

Or, if you don't want to "eat up" lines consisting of spaces:

line in ('\n', '\r\n')

You cannot use WHILE like that; see: mysql DECLARE WHILE outside stored procedure how?

You have to put your code in a stored procedure. Example:

CREATE PROCEDURE myproc()
BEGIN
    DECLARE i int DEFAULT 237692001;
    WHILE i <= 237692004 DO
        INSERT INTO mytable (code, active, total) VALUES (i, 1, 1);
        SET i = i + 1;
    END WHILE;
END

Fiddle: http://sqlfiddle.com/#!2/a4f92/1

Alternatively, generate a list of INSERT statements using any programming language you like; for a one-time creation, it should be fine. As an example, here's a Bash one-liner:

for i in {2376921001..2376921099}; do echo "INSERT INTO mytable (code, active, total) VALUES ($i, 1, 1);"; done

By the way, you made a typo in your numbers; 2376921001 has 10 digits, 237692200 only 9.

static_cast vs dynamic_cast vs reinterpret_cast internals view on a downcast/upcast

In this answer, I want to compare these three mechanisms on a concrete upcast/downcast example and analyze what happens to the underlying pointers/memory/assembly to give a concrete understanding of how they compare.

I believe that this will give a good intuition on how those casts are different:

• static_cast: does one address offset at runtime (low runtime impact) and no safety checks that a downcast is correct.

• dyanamic_cast: does the same address offset at runtime like static_cast, but also and an expensive safety check that a downcast is correct using RTTI.

  This safety check allows you to query if a base class pointer is of a given type at runtime by checking a return of nullptr which indicates an invalid downcast.

  Therefore, if your code is not able to check for that nullptr and take a valid non-abort action, you should just use static_cast instead of dynamic cast.

  If an abort is the only action your code can take, maybe you only want to enable the dynamic_cast in debug builds (-NDEBUG), and use static_cast otherwise, e.g. as done here, to not slow down your fast runs.

• reinterpret_cast: does nothing at runtime, not even the address offset. The pointer must point exactly to the correct type, not even a base class works. You generally don't want this unless raw byte streams are involved.

Consider the following code example:

main.cpp

#include <iostream>

struct B1 {
    B1(int int_in_b1) : int_in_b1(int_in_b1) {}
    virtual ~B1() {}
    void f0() {}
    virtual int f1() { return 1; }
    int int_in_b1;
};

struct B2 {
    B2(int int_in_b2) : int_in_b2(int_in_b2) {}
    virtual ~B2() {}
    virtual int f2() { return 2; }
    int int_in_b2;
};

struct D : public B1, public B2 {
    D(int int_in_b1, int int_in_b2, int int_in_d)
        : B1(int_in_b1), B2(int_in_b2), int_in_d(int_in_d) {}
    void d() {}
    int f2() { return 3; }
    int int_in_d;
};

int main() {
    B2 *b2s[2];
    B2 b2{11};
    D *dp;
    D d{1, 2, 3};

    // The memory layout must support the virtual method call use case.
    b2s[0] = &b2;
    // An upcast is an implicit static_cast<>().
    b2s[1] = &d;
    std::cout << "&d           " << &d           << std::endl;
    std::cout << "b2s[0]       " << b2s[0]       << std::endl;
    std::cout << "b2s[1]       " << b2s[1]       << std::endl;
    std::cout << "b2s[0]->f2() " << b2s[0]->f2() << std::endl;
    std::cout << "b2s[1]->f2() " << b2s[1]->f2() << std::endl;

    // Now for some downcasts.

    // Cannot be done implicitly
    // error: invalid conversion from ‘B2*’ to ‘D*’ [-fpermissive]
    // dp = (b2s[0]);

    // Undefined behaviour to an unrelated memory address because this is a B2, not D.
    dp = static_cast<D*>(b2s[0]);
    std::cout << "static_cast<D*>(b2s[0])            " << dp           << std::endl;
    std::cout << "static_cast<D*>(b2s[0])->int_in_d  " << dp->int_in_d << std::endl;

    // OK
    dp = static_cast<D*>(b2s[1]);
    std::cout << "static_cast<D*>(b2s[1])            " << dp           << std::endl;
    std::cout << "static_cast<D*>(b2s[1])->int_in_d  " << dp->int_in_d << std::endl;

    // Segfault because dp is nullptr.
    dp = dynamic_cast<D*>(b2s[0]);
    std::cout << "dynamic_cast<D*>(b2s[0])           " << dp           << std::endl;
    //std::cout << "dynamic_cast<D*>(b2s[0])->int_in_d " << dp->int_in_d << std::endl;

    // OK
    dp = dynamic_cast<D*>(b2s[1]);
    std::cout << "dynamic_cast<D*>(b2s[1])           " << dp           << std::endl;
    std::cout << "dynamic_cast<D*>(b2s[1])->int_in_d " << dp->int_in_d << std::endl;

    // Undefined behaviour to an unrelated memory address because this
    // did not calculate the offset to get from B2* to D*.
    dp = reinterpret_cast<D*>(b2s[1]);
    std::cout << "reinterpret_cast<D*>(b2s[1])           " << dp           << std::endl;
    std::cout << "reinterpret_cast<D*>(b2s[1])->int_in_d " << dp->int_in_d << std::endl;
}

Compile, run and disassemble with:

g++ -ggdb3 -O0 -std=c++11 -Wall -Wextra -pedantic -o main.out main.cpp
setarch `uname -m` -R ./main.out
gdb -batch -ex "disassemble/rs main" main.out

where setarch is used to disable ASLR to make it easier to compare runs.

Possible output:

&d           0x7fffffffc930
b2s[0]       0x7fffffffc920
b2s[1]       0x7fffffffc940
b2s[0]->f2() 2
b2s[1]->f2() 3
static_cast<D*>(b2s[0])            0x7fffffffc910
static_cast<D*>(b2s[0])->int_in_d  1
static_cast<D*>(b2s[1])            0x7fffffffc930
static_cast<D*>(b2s[1])->int_in_d  3
dynamic_cast<D*>(b2s[0])           0
dynamic_cast<D*>(b2s[1])           0x7fffffffc930
dynamic_cast<D*>(b2s[1])->int_in_d 3
reinterpret_cast<D*>(b2s[1])           0x7fffffffc940
reinterpret_cast<D*>(b2s[1])->int_in_d 32767

Now, as mentioned at: https://en.wikipedia.org/wiki/Virtual_method_table in order to support the virtual method calls efficiently, the memory data structure of D has to look something like:

B1:
  +0: pointer to virtual method table of B1
  +4: value of int_in_b1

B2:
  +0: pointer to virtual method table of B2
  +4: value of int_in_b2

D:
  +0: pointer to virtual method table of D (for B1)
  +4: value of int_in_b1
  +8: pointer to virtual method table of D (for B2)
 +12: value of int_in_b2
 +16: value of int_in_d

The key fact is that the memory data structure of D contains inside it memory structure compatible with that of B1 and that of B2 internally.

Therefore we reach the critical conclusion:

an upcast or downcast only needs to shift the pointer value by a value known at compile time

This way, when D gets passed to the base type array, the type cast actually calculates that offset and points something that looks exactly like a valid B2 in memory:

b2s[1] = &d;

except that this one has the vtable for D instead of B2, and therefore all virtual calls work transparently.

Now, we can finally get back to type casting and the analysis of our concrete example.

From the stdout output we see:

&d           0x7fffffffc930
b2s[1]       0x7fffffffc940

Therefore, the implicit static_cast done there did correctly calculate the offset from the full D data structure at 0x7fffffffc930 to the B2 like one which is at 0x7fffffffc940. We also infer that what lies between 0x7fffffffc930 and 0x7fffffffc940 is likely be the B1 data and vtable.

Then, on the downcast sections, it is now easy to understand how the invalid ones fail and why:

• static_cast<D*>(b2s[0]) 0x7fffffffc910: the compiler just went up 0x10 at compile time bytes to try and go from a B2 to the containing D

  But because b2s[0] was not a D, it now points to an undefined memory region.

  The disassembly is:

  49          dp = static_cast<D*>(b2s[0]);
     0x0000000000000fc8 <+414>:   48 8b 45 d0     mov    -0x30(%rbp),%rax
     0x0000000000000fcc <+418>:   48 85 c0        test   %rax,%rax
     0x0000000000000fcf <+421>:   74 0a   je     0xfdb <main()+433>
     0x0000000000000fd1 <+423>:   48 8b 45 d0     mov    -0x30(%rbp),%rax
     0x0000000000000fd5 <+427>:   48 83 e8 10     sub    $0x10,%rax
     0x0000000000000fd9 <+431>:   eb 05   jmp    0xfe0 <main()+438>
     0x0000000000000fdb <+433>:   b8 00 00 00 00  mov    $0x0,%eax
     0x0000000000000fe0 <+438>:   48 89 45 98     mov    %rax,-0x68(%rbp)
  

  so we see that GCC does:

  • check if pointer is NULL, and if yes return NULL
  • otherwise, subtract 0x10 from it to reach the D which does not exist

• dynamic_cast<D*>(b2s[0]) 0: C++ actually found that the cast was invalid and returned nullptr!

  There is no way this can be done at compile time, and we will confirm that from the disassembly:

  59          dp = dynamic_cast<D*>(b2s[0]);
     0x00000000000010ec <+706>:   48 8b 45 d0     mov    -0x30(%rbp),%rax
     0x00000000000010f0 <+710>:   48 85 c0        test   %rax,%rax
     0x00000000000010f3 <+713>:   74 1d   je     0x1112 <main()+744>
     0x00000000000010f5 <+715>:   b9 10 00 00 00  mov    $0x10,%ecx
     0x00000000000010fa <+720>:   48 8d 15 f7 0b 20 00    lea    0x200bf7(%rip),%rdx        # 0x201cf8 <_ZTI1D>
     0x0000000000001101 <+727>:   48 8d 35 28 0c 20 00    lea    0x200c28(%rip),%rsi        # 0x201d30 <_ZTI2B2>
     0x0000000000001108 <+734>:   48 89 c7        mov    %rax,%rdi
     0x000000000000110b <+737>:   e8 c0 fb ff ff  callq  0xcd0 <__dynamic_cast@plt>
     0x0000000000001110 <+742>:   eb 05   jmp    0x1117 <main()+749>
     0x0000000000001112 <+744>:   b8 00 00 00 00  mov    $0x0,%eax
     0x0000000000001117 <+749>:   48 89 45 98     mov    %rax,-0x68(%rbp)
  

  First there is a NULL check, and it returns NULL if th einput is NULL.

  Otherwise, it sets up some arguments in the RDX, RSI and RDI and calls __dynamic_cast.

  I don't have the patience to analyze this further now, but as others said, the only way for this to work is for __dynamic_cast to access some extra RTTI in-memory data structures that represent the class hierarchy.

  It must therefore start from the B2 entry for that table, then walk this class hierarchy until it finds that the vtable for a D typecast from b2s[0].

  This is why reinterpret cast is potentially expensive! Here is an example where a one liner patch converting a dynamic_cast to a static_cast in a complex project reduced runtime by 33%!.

• reinterpret_cast<D*>(b2s[1]) 0x7fffffffc940 this one just believes us blindly: we said there is a D at address b2s[1], and the compiler does no offset calculations.

  But this is wrong, because D is actually at 0x7fffffffc930, what is at 0x7fffffffc940 is the B2-like structure inside D! So trash gets accessed.

  We can confirm this from the horrendous -O0 assembly that just moves the value around:

  70          dp = reinterpret_cast<D*>(b2s[1]);
     0x00000000000011fa <+976>:   48 8b 45 d8     mov    -0x28(%rbp),%rax
     0x00000000000011fe <+980>:   48 89 45 98     mov    %rax,-0x68(%rbp)
  

Related questions:

• When should static_cast, dynamic_cast, const_cast and reinterpret_cast be used?
• How is dynamic_cast implemented
• Downcasting using the 'static_cast' in C++

Tested on Ubuntu 18.04 amd64, GCC 7.4.0.

Quote_Month (Worksheet!$D:$D) contains a formula (=TEXT(Worksheet!$E:$E,"mmm-yy"))to convert a date/time number from another column into a text based month reference.

You can use OR by adding + in Sumproduct. See this

=SUMPRODUCT((Quote_Value)*(Salesman="JBloggs")*(Days_To_Close<=90)*((Quote_Month="Cond1")+(Quote_Month="Cond2")+(Quote_Month="Cond3")))

ScreenShot

On Ubunbtu.

Ben's message is close but it's not the root password that is the problem, the problem I found was I had created a password for the phpmyadmin database when I installed it. This password is not carried into the installation on ubuntu so the variable $dbpass=''; in the database settings file is empty and not the password you set.

1. To check you have the right password at the command line login to mysql using the following command: mysql -u phpmyadmin -p try a blank password I found I got access denied, enter the command again using the password you set during installation. If it logs in you now know what the password is.
2. Edit /etc/phpadmin/config-db.php and change $dbpass=''; to $dbpass='Your Password'; and save the file.
3. Edit /etc/dbconfig-common/phpmyadmin.conf change dbc_dbpass=''; to dbc_dbpass='Your Password'; and save the file. Close your browser and reload you will now find the message has gone way.

<script type="text/javascript">
$(function () {
        $(document) .ajaxStart(function () {
                $("#dropdownID").attr("disabled", "disabled");
            })
            .ajaxStop(function () {
                $("#dropdownID").removeAttr("disabled");

            });

});
</script>

You need a pairwise() (or grouped()) implementation.

For Python 2:

from itertools import izip

def pairwise(iterable):
    "s -> (s0, s1), (s2, s3), (s4, s5), ..."
    a = iter(iterable)
    return izip(a, a)

for x, y in pairwise(l):
   print "%d + %d = %d" % (x, y, x + y)

Or, more generally:

from itertools import izip

def grouped(iterable, n):
    "s -> (s0,s1,s2,...sn-1), (sn,sn+1,sn+2,...s2n-1), (s2n,s2n+1,s2n+2,...s3n-1), ..."
    return izip(*[iter(iterable)]*n)

for x, y in grouped(l, 2):
   print "%d + %d = %d" % (x, y, x + y)

In Python 3, you can replace izip with the built-in zip() function, and drop the import.

All credit to martineau for his answer to my question, I have found this to be very efficient as it only iterates once over the list and does not create any unnecessary lists in the process.

N.B: This should not be confused with the pairwise recipe in Python's own itertools documentation, which yields s -> (s0, s1), (s1, s2), (s2, s3), ..., as pointed out by @lazyr in the comments.

Little addition for those who would like to do type checking with mypy on Python 3:

from typing import Iterable, Tuple, TypeVar

T = TypeVar("T")

def grouped(iterable: Iterable[T], n=2) -> Iterable[Tuple[T, ...]]:
    """s -> (s0,s1,s2,...sn-1), (sn,sn+1,sn+2,...s2n-1), ..."""
    return zip(*[iter(iterable)] * n)

For less use -u to display carriage returns (^M) and backspaces (^H), or -U to show the previous and tabs (^I) for example:

$ awk 'BEGIN{print "foo\bbar\tbaz\r\n"}' | less -U 
foo^Hbar^Ibaz^M

(END)

Without the -U switch the output would be:

fobar   baz

(END)

See man less for more exact description on the features.

It should suffice to say whether bcrypt or SHA-512 (in the context of an appropriate algorithm like PBKDF2) is good enough. And the answer is yes, either algorithm is secure enough that a breach will occur through an implementation flaw, not cryptanalysis.

If you insist on knowing which is "better", SHA-512 has had in-depth reviews by NIST and others. It's good, but flaws have been recognized that, while not exploitable now, have led to the the SHA-3 competition for new hash algorithms. Also, keep in mind that the study of hash algorithms is "newer" than that of ciphers, and cryptographers are still learning about them.

Even though bcrypt as a whole hasn't had as much scrutiny as Blowfish itself, I believe that being based on a cipher with a well-understood structure gives it some inherent security that hash-based authentication lacks. Also, it is easier to use common GPUs as a tool for attacking SHA-2–based hashes; because of its memory requirements, optimizing bcrypt requires more specialized hardware like FPGA with some on-board RAM.

Note: bcrypt is an algorithm that uses Blowfish internally. It is not an encryption algorithm itself. It is used to irreversibly obscure passwords, just as hash functions are used to do a "one-way hash".

Cryptographic hash algorithms are designed to be impossible to reverse. In other words, given only the output of a hash function, it should take "forever" to find a message that will produce the same hash output. In fact, it should be computationally infeasible to find any two messages that produce the same hash value. Unlike a cipher, hash functions aren't parameterized with a key; the same input will always produce the same output.

If someone provides a password that hashes to the value stored in the password table, they are authenticated. In particular, because of the irreversibility of the hash function, it's assumed that the user isn't an attacker that got hold of the hash and reversed it to find a working password.

Now consider bcrypt. It uses Blowfish to encrypt a magic string, using a key "derived" from the password. Later, when a user enters a password, the key is derived again, and if the ciphertext produced by encrypting with that key matches the stored ciphertext, the user is authenticated. The ciphertext is stored in the "password" table, but the derived key is never stored.

In order to break the cryptography here, an attacker would have to recover the key from the ciphertext. This is called a "known-plaintext" attack, since the attack knows the magic string that has been encrypted, but not the key used. Blowfish has been studied extensively, and no attacks are yet known that would allow an attacker to find the key with a single known plaintext.

So, just like irreversible algorithms based cryptographic digests, bcrypt produces an irreversible output, from a password, salt, and cost factor. Its strength lies in Blowfish's resistance to known plaintext attacks, which is analogous to a "first pre-image attack" on a digest algorithm. Since it can be used in place of a hash algorithm to protect passwords, bcrypt is confusingly referred to as a "hash" algorithm itself.

Assuming that rainbow tables have been thwarted by proper use of salt, any truly irreversible function reduces the attacker to trial-and-error. And the rate that the attacker can make trials is determined by the speed of that irreversible "hash" algorithm. If a single iteration of a hash function is used, an attacker can make millions of trials per second using equipment that costs on the order of $1000, testing all passwords up to 8 characters long in a few months.

If however, the digest output is "fed back" thousands of times, it will take hundreds of years to test the same set of passwords on that hardware. Bcrypt achieves the same "key strengthening" effect by iterating inside its key derivation routine, and a proper hash-based method like PBKDF2 does the same thing; in this respect, the two methods are similar.

So, my recommendation of bcrypt stems from the assumptions 1) that a Blowfish has had a similar level of scrutiny as the SHA-2 family of hash functions, and 2) that cryptanalytic methods for ciphers are better developed than those for hash functions.

This works for me - I finally figured a one liner

df <- as.data.frame(lapply(df,function (y) if(class(y)=="factor" ) as.character(y) else y),stringsAsFactors=F)

Add the getter/setter missing inside the bean mentioned in the error message.

While I do love using CHECKSUM, I feel that a better way to go is using NEWID(), just because you don't have to go through a complicated math to generate simple numbers .

ROUND( 1000 *RAND(convert(varbinary, newid())), 0)

You can replace the 1000 with whichever number you want to set as the limit, and you can always use a plus sign to create a range, let's say you want a random number between 100 and 200, you can do something like :

100 + ROUND( 100 *RAND(convert(varbinary, newid())), 0)

Putting it together in your query :

UPDATE CattleProds 
SET SheepTherapy= ROUND( 1000 *RAND(convert(varbinary, newid())), 0)
WHERE SheepTherapy IS NULL

If your are using MySQL Latest version following may help to reach your requirement.

select * from products where attribs_json->"$.feature.value[*]" in (1,3)

Yet another late answer... If you are java minded, here is the bashj (https://sourceforge.net/projects/bashj/) solution:

#!/usr/bin/bashj

#!java

private static String[] cuts;
private static int cnt=0;
public static void split(String words,String regexp) {cuts=words.split(regexp);}
public static String next() {return(cnt<cuts.length ? cuts[cnt++] : "null");}

#!bash

IN="[email protected];[email protected]"

: j.split($IN,";")    # java method call

while true
do
    NAME=j.next()     # java method call
    if [ $NAME != null ] ; then echo $NAME ; else exit ; fi
done

I'm assuming you are having at least OSX 10.7, so go ahead into the applications folder (Click on Finder icon > On the Sidebar, you'll find "Applications", click on it ), delete the "Xcode" icon. That will remove Xcode from your system completely. Restart your mac.

Now go to https://developer.apple.com/download/more/ and download an older version of Xcode, as needed and install. You need an Apple ID to login to that portal.

Sybase :

%              : Matches any string of zero or more characters.
_              : Matches a single character.
[specifier]    : Brackets enclose ranges or sets, such as [a-f] 
                 or [abcdef].Specifier  can take two forms:

                 rangespec1-rangespec2: 
                   rangespec1 indicates the start of a range of characters.
                   - is a special character, indicating a range.
                   rangespec2 indicates the end of a range of characters.

                 set: 
                  can be composed of any discrete set of values, in any 
                  order, such as [a2bR].The range [a-f], and the 
                  sets [abcdef] and [fcbdae] return the same 
                  set of values.

                 Specifiers are case-sensitive.

[^specifier]    : A caret (^) preceding a specifier indicates 
                  non-inclusion. [^a-f] means "not in the range 
                  a-f"; [^a2bR] means "not a, 2, b, or R."

This referes to http://blogs.msdn.com/b/pfxteam/archive/2012/02/12/10266988.aspx , http://winrtstoragehelper.codeplex.com/ , Windows 8 app store and .net 4.5

Here is my angle on this:

The async/await language feature makes many things fairly easy but it also introduces a scenario that was rarely encounter before it was so easy to use async calls: reentrance.

This is especially true for event handlers, because for many events you don't have any clue about whats happening after you return from the event handler. One thing that might actually happen is, that the async method you are awaiting in the first event handler, gets called from another event handler still on the same thread.

Here is a real scenario I came across in a windows 8 App store app: My app has two frames: coming into and leaving from a frame I want to load/safe some data to file/storage. OnNavigatedTo/From events are used for the saving and loading. The saving and loading is done by some async utility function (like http://winrtstoragehelper.codeplex.com/). When navigating from frame 1 to frame 2 or in the other direction, the async load and safe operations are called and awaited. The event handlers become async returning void => they cant be awaited.

However, the first file open operation (lets says: inside a save function) of the utility is async too and so the first await returns control to the framework, which sometime later calls the other utility (load) via the second event handler. The load now tries to open the same file and if the file is open by now for the save operation, fails with an ACCESSDENIED exception.

A minimum solution for me is to secure the file access via a using and an AsyncLock.

private static readonly AsyncLock m_lock = new AsyncLock();
...

using (await m_lock.LockAsync())
{
    file = await folder.GetFileAsync(fileName);
    IRandomAccessStream readStream = await file.OpenAsync(FileAccessMode.Read);
    using (Stream inStream = Task.Run(() => readStream.AsStreamForRead()).Result)
    {
        return (T)serializer.Deserialize(inStream);
    }
}

Please note that his lock basically locks down all file operation for the utility with just one lock, which is unnecessarily strong but works fine for my scenario.

Here is my test project: a windows 8 app store app with some test calls for the original version from http://winrtstoragehelper.codeplex.com/ and my modified version that uses the AsyncLock from Stephen Toub http://blogs.msdn.com/b/pfxteam/archive/2012/02/12/10266988.aspx.

May I also suggest this link: http://www.hanselman.com/blog/ComparingTwoTechniquesInNETAsynchronousCoordinationPrimitives.aspx

this worked for me

$ gcc dbconnect.c -o dbconnect -lmysqlclient
$ ./dbconnect

-lmysqlclient is must.

and i would personally recommend to use following notation instead of using -I compilation flag.

#include <mysql/mysql.h>

The any() function makes for readable code

> w <- c(1,2,3)
> any(w==1)
[1] TRUE

> v <- c('a','b','c')
> any(v=='b')
[1] TRUE

> any(v=='f')
[1] FALSE

Convert your number to a Numeric or Decimal.

Replace your query with the following.

Sql server

Select Convert(Numeric(38, 2), Minutes/60.0) from ....

MySql:

Select Convert(Minutes/60.0, Decimal(65, 2)) from ....

The Cast function is a wrapper for the Convert function. Couple that with SQL being an interpreted language and the result is that even though the two functions produce the same results, there is slightly more going on behind the scenes in the Cast function. Using the Convert function is a small saving, but small savings multiply. The parameters for Numeric and Decimal (38, 2) and (65, 2) represent the maximum precision level and decimal places to use.

Right click on the .svc file in Solution Explorer and click View Markup

 <%@ ServiceHost Language="C#" Debug="true" 
     Service="MyService.**GetHistoryInfo**" 
     CodeBehind="GetHistoryInfo.svc.cs" %>

Update the service reference where you are referring to.

A general/reusable solution

This answer is provided for future reference to all those that bump into this problem. Solution consists of two things:

1. Custom exception ModelStateException that gets thrown when validation fails on the server (model state reports validation errors when we use data annotations and use strong typed controller action parameters)
2. Custom controller action error filter HandleModelStateExceptionAttribute that catches custom exception and returns HTTP error status with model state error in the body

This provides the optimal infrastructure for jQuery Ajax calls to use their full potential with success and error handlers.

Client side code

$.ajax({
    type: "POST",
    url: "some/url",
    success: function(data, status, xhr) {
        // handle success
    },
    error: function(xhr, status, error) {
        // handle error
    }
});

Server side code

[HandleModelStateException]
public ActionResult Create(User user)
{
    if (!this.ModelState.IsValid)
    {
        throw new ModelStateException(this.ModelState);
    }

    // create new user because validation was successful
}

The whole problem is detailed in this blog post where you can find all the code to run this in your application.

A key point that I find missing in the above answers is that urllib returns an object of type <class http.client.HTTPResponse> whereas requests returns <class 'requests.models.Response'>.

Due to this, read() method can be used with urllib but not with requests.

P.S. : requests is already rich with so many methods that it hardly needs one more as read() ;>

You can either cast Height as a decimal:

select cast(@height as decimal(10, 5))/10 as heightdecimal

or you place a decimal point in your value you are dividing by:

declare @height int
set @height = 1023

select @height/10.0 as heightdecimal

see sqlfiddle with an example

SET @pos := 0;
UPDATE TABLE_NAME SET Roll_No = ( SELECT @pos := @pos + 1 ) ORDER BY First_Name ASC;

In the above example query simply update the student Roll_No column depending on the student Frist_Name column. From 1 to No_of_records in the table. I hope it's clear now.

Actually you can pass a parameter ( http://docs.angularjs.org/api/ng.filter:filter ) and don't need a custom function just for this. If you rewrite your HTML as below it'll work:

<div ng:app>
 <div ng-controller="HelloCntl">
 <ul>
    <li ng-repeat="friend in friends | filter:{name:'!Adam'}">
        <span>{{friend.name}}</span>
        <span>{{friend.phone}}</span>
    </li>
 </ul>
 </div>
</div>

http://jsfiddle.net/ZfGx4/59/

Hibernate's PostgreSQL dialect isn't very bright. It doesn't know about your per-SERIAL sequences, and is assuming there's a global database-wide sequence called "hibernate_sequence" that it can use.

(UPDATE: It appears that newer Hibernate versions may use the default per-table sequences when GenerationType.IDENTITY is specified. Test your version and use this instead of the below if it works for you.)

You need to change your mappings to explicitly specify each sequence. It's annoying, repetitive, and pointless.

@Entity
@Table(name = "JUDGEMENTS")
public class Judgement implements Serializable, Cloneable {

    private static final long serialVersionUID = -7049957706738879274L;

    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator="judgements_id_seq")
    @SequenceGenerator(name="judgements_id_seq", sequenceName="judgements_id_seq", allocationSize=1)
    @Column(name = "JUD_ID")
    private Long _judId;
...

The allocationSize=1 is quite important. If you omit it, Hibernate will blindly assume that the sequence is defined with INCREMENT 50 so when it gets a value from a sequence it can use that value and the 49 values below it as unique generated keys. If your database sequences increment by 1 - the default - then this will result in unique violations as Hibernate tries to re-use existing keys.

Note that getting one key at a time will result in an additional round trip per insert. As far as I can tell Hibernate isn't capable of using INSERT ... RETURNING to efficiently return generated keys, nor can it apparently use the JDBC generated keys interface. If you tell it to use a sequence, it'll call nextval to get the value then insert that explicitly, resulting in two round trips. To reduce the cost of that, you can set a greater increment on key sequences with lots of inserts , remembering to set it on the mapping and the underlying database sequence. That'll cause Hibernate to call nextval less frequently and cache blocks of keys to hand out as it goes.

I'm sure you can see from the above that I don't agree with the Hibernate design choices made here, at least from the perspective of using it with PostgreSQL. They should be using getGeneratedKeys or using INSERT ... RETURNING with DEFAULT for the key, letting the database take care of this without Hibernate having to trouble its self over the names of the sequences or explicit access to them.

BTW, if you're using Hibernate with Pg you'll possibly also want an oplock trigger for Pg to allow Hibernate's optimistic locking to interact safely with normal database locking. Without it or something like it your Hibernate updates will tend to clobber changes made via other regular SQL clients. Ask me how I know.

You can generate easily with livegap charts
Select Mulicolors from Bar menu

_{(source: livegap.com)}

** chart library used is chartnew.js modified version of chart.js library
with chartnew.js code will be something like this

var barChartData = {
        labels: ["001", "002", "003", "004", "005", "006", "007"],
        datasets: [
            {
                label: "My First dataset",
                fillColor: ["rgba(0,10,220,0.5)","rgba(220,0,10,0.5)","rgba(220,0,0,0.5)","rgba(120,250,120,0.5)" ],
                strokeColor: "rgba(220,220,220,0.8)", 
                highlightFill: "rgba(220,220,220,0.75)",
                highlightStroke: "rgba(220,220,220,1)",
                data: [20, 59, 80, 81, 56, 55, 40]
            }
        ]
    };

Use scp priv_key.pem source user@host:target if you need to connect using a private key.

or if using pscp then use pscp -i priv_key.ppk source user@host:target

I would create a comparator for the person class that can be parametrized with a certain sorting behaviour. Here I can set the sorting order but it can be modified to allow sorting for other person attributes as well.

public class PersonComparator implements Comparator<Person> {

  public enum SortOrder {ASCENDING, DESCENDING}

  private SortOrder sortOrder;

  public PersonComparator(SortOrder sortOrder) {
    this.sortOrder = sortOrder;
  }

  @Override
  public int compare(Person person1, Person person2) {
    Integer age1 = person1.getAge();
    Integer age2 = person2.getAge();
    int compare = Math.signum(age1.compareTo(age2));

    if (sortOrder == ASCENDING) {
      return compare;
    } else {
      return compare * (-1);
    }
  }
}

(hope it compiles now, I have no IDE or JDK at hand, coded 'blind')

Edit

Thanks to Thomas, edited the code. I wouldn't say that the usage of Math.signum is good, performant, effective, but I'd like to keep it as a reminder, that the compareTo method can return any integer and multiplying by (-1) will fail if the implementation returns Integer.MIN_INTEGER... And I removed the setter because it's cheap enough to construct a new PersonComparator just when it's needed.

But I keep the boxing because it shows that I rely on an existing Comparable implementation. Could have done something like Comparable<Integer> age1 = new Integer(person1.getAge()); but that looked too ugly. The idea was to show a pattern which could easily be adapted to other Person attributes, like name, birthday as Date and so on.

There are a few reasons that ESLint may not be giving you feedback. ESLint is going to look for your configuration file first in your project and if it can't find a .eslintrc.json there it will look for a global configuration. Personally, I only install ESLint in each project and create a configuration based off of each project.

The second reason why you aren't getting feedback is that to get the feedback you have to define your linting rules in the .eslintrc.json. If there are no rules there, or you have no plugins installed then you have to define them.

You can create a directory with PHP using the mkdir() function.

mkdir("/path/to/my/dir", 0700);

You can use fopen() to create a file inside that directory with the use of the mode w.

fopen('myfile.txt', 'w');

w : Open for writing only; place the file pointer at the beginning of the file and truncate the file to zero length. If the file does not exist, attempt to create it.

A sidenote to consider, you can store arrays in Postgres.

As your query string is a literal, and assuming your dates are properly stored as DATE you should use date literals:

SELECT * FROM OrderArchive
WHERE OrderDate <= DATE '2015-12-31'

If you want to use TO_DATE (because, for example, your query value is not a literal), I suggest you to explicitly set the NLS_DATE_LANGUAGE parameter as you are using US abbreviated month names. That way, it won't break on some localized Oracle Installation:

SELECT * FROM OrderArchive
WHERE OrderDate <= to_date('31 Dec 2014', 'DD MON YYYY',
                           'NLS_DATE_LANGUAGE = American');

See,

There are two ways to convert an RDD to DF in Spark.

toDF() and createDataFrame(rdd, schema)

I will show you how you can do that dynamically.

toDF()

The toDF() command gives you the way to convert an RDD[Row] to a Dataframe. The point is, the object Row() can receive a **kwargs argument. So, there is an easy way to do that.

from pyspark.sql.types import Row

#here you are going to create a function
def f(x):
    d = {}
    for i in range(len(x)):
        d[str(i)] = x[i]
    return d

#Now populate that
df = rdd.map(lambda x: Row(**f(x))).toDF()

This way you are going to be able to create a dataframe dynamically.

createDataFrame(rdd, schema)

Other way to do that is creating a dynamic schema. How?

This way:

from pyspark.sql.types import StructType
from pyspark.sql.types import StructField
from pyspark.sql.types import StringType

schema = StructType([StructField(str(i), StringType(), True) for i in range(32)])

df = sqlContext.createDataFrame(rdd, schema)

This second way is cleaner to do that...

So this is how you can create dataframes dynamically.

iOS 9 (may) force developers to use App Transport Security exclusively. I overheard this somewhere randomly so I don't know whether this is true myself. But I suspect it and have come to this conclusion:

The app running on iOS 9 will (maybe) no longer connect to a Meteor server without SSL.

This means running meteor run ios or meteor run ios-device will (probably?) no longer work.

In the app's info.plist, NSAppTransportSecurity [Dictionary] needs to have a key NSAllowsArbitraryLoads [Boolean] to be set to YES or Meteor needs to use https for its localhost server soon.

Here is my simple code FormData with react-native to post request with string and image.

I have used react-native-image-picker to capture/select photo react-native-image-picker

let photo = { uri: source.uri}
let formdata = new FormData();

formdata.append("product[name]", 'test')
formdata.append("product[price]", 10)
formdata.append("product[category_ids][]", 2)
formdata.append("product[description]", '12dsadadsa')
formdata.append("product[images_attributes[0][file]]", {uri: photo.uri, name: 'image.jpg', type: 'image/jpeg'})

NOTE you can change image/jpeg to other content type. You can get content type from image picker response.

fetch('http://192.168.1.101:3000/products',{
  method: 'post',
  headers: {
    'Content-Type': 'multipart/form-data',
  },
  body: formdata
  }).then(response => {
    console.log("image uploaded")
  }).catch(err => {
    console.log(err)
  })  
});

For Travers an String you can also use charAt() with the string.

like :

String str = "xyz"; // given String
char st = str.charAt(0); // for example we take 0 index element 
System.out.println(st); // print the char at 0 index 

charAt() is method of string handling in java which help to Travers the string for specific character.

If your DB table already exists and you do NOT want to include all the table's columns in your CSV file, then when you run PHP Admin Import, you'll need fill in the Column Names field in the Format-Specific Options for CSV - Shown here at the bottom of the following screenshot.

In summary:

• Choose a CSV file
• Set the Format to CSV
• Fill in the Column Names field with the names of the columns in your CSV
• If your CSV file has the column names listed in row 1, set "Skip this number of queries (for SQL) or lines (for other formats), starting from the first one" to 1

You need to use regular expressions in your custom validator. For example, here's the code that allows only 9 digits in the input fields:

function ssnValidator(control: FormControl): {[key: string]: any} {
  const value: string = control.value || '';
  const valid = value.match(/^\d{9}$/);
  return valid ? null : {ssn: true};
}

Take a look at a sample app here:

https://github.com/Farata/angular2typescript/tree/master/Angular4/form-samples/src/app/reactive-validator

By default Build location is in Derived Data.

Please note: a path to a product can be changed if you delete DerivedData during development process and rebuild it again.

Xcode -> Preferences... -> Locations 

You can change the location of Build location. It will have an effect on the whole workspace

File -> Project/Workspace Settings... -> Advanced 

You can change the location of Target using:

Project editor -> select a target -> Build Settings -> Per-configuration Build Products Path

The default value is$(BUILD_DIR)/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)

It makes sense if you want to create an autonomic Build location

Xcode 10.2.1

Some time you might want to verify whether any files exist inside sub directories and ignore those empty sub directories; in this case you can used method below:

public bool isDirectoryContainFiles(string path) {
    if (!Directory.Exists(path)) return false;
    return Directory.EnumerateFiles(path, "*", SearchOption.AllDirectories).Any();
}

Use this:

mysqli_query($this->db_link, $query) or die(mysqli_error($this->db_link)); 
# mysqli_query($link,$query) returns 0 if there's an error.
# mysqli_error($link) returns a string with the last error message

You can also use this to print the error code.

echo mysqli_errno($this->db_link);

Take a look here and here

Android N (Api level 24) update (no warnings):

   Locale getCurrentLocale(Context context){
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N){
            return context.getResources().getConfiguration().getLocales().get(0);
        } else{
            //noinspection deprecation
            return context.getResources().getConfiguration().locale;
        }
    }

The JPA @Column Annotation

The nullable attribute of the @Column annotation has two purposes:

• it's used by the schema generation tool
• it's used by Hibernate during flushing the Persistence Context

Schema Generation Tool

The HBM2DDL schema generation tool translates the @Column(nullable = false) entity attribute to a NOT NULL constraint for the associated table column when generating the CREATE TABLE statement.

As I explained in the Hibernate User Guide, it's better to use a tool like Flyway instead of relying on the HBM2DDL mechanism for generating the database schema.

Persistence Context Flush

When flushing the Persistence Context, Hibernate ORM also uses the @Column(nullable = false) entity attribute:

new Nullability( session ).checkNullability( values, persister, true );

If the validation fails, Hibernate will throw a PropertyValueException, and prevents the INSERT or UPDATE statement to be executed needesly:

if ( !nullability[i] && value == null ) {
    //check basic level one nullablilty
    throw new PropertyValueException(
            "not-null property references a null or transient value",
            persister.getEntityName(),
            persister.getPropertyNames()[i]
        );    
}

The Bean Validation @NotNull Annotation

The @NotNull annotation is defined by Bean Validation and, just like Hibernate ORM is the most popular JPA implementation, the most popular Bean Validation implementation is the Hibernate Validator framework.

When using Hibernate Validator along with Hibernate ORM, Hibernate Validator will throw a ConstraintViolation when validating the entity.

Internally, SQL Server treats an inline table valued function much like it would a view and treats a multi-statement table valued function similar to how it would a stored procedure.

When an inline table-valued function is used as part of an outer query, the query processor expands the UDF definition and generates an execution plan that accesses the underlying objects, using the indexes on these objects.

For a multi-statement table valued function, an execution plan is created for the function itself and stored in the execution plan cache (once the function has been executed the first time). If multi-statement table valued functions are used as part of larger queries then the optimiser does not know what the function returns, and so makes some standard assumptions - in effect it assumes that the function will return a single row, and that the returns of the function will be accessed by using a table scan against a table with a single row.

Where multi-statement table valued functions can perform poorly is when they return a large number of rows and are joined against in outer queries. The performance issues are primarily down to the fact that the optimiser will produce a plan assuming that a single row is returned, which will not necessarily be the most appropriate plan.

As a general rule of thumb we have found that where possible inline table valued functions should be used in preference to multi-statement ones (when the UDF will be used as part of an outer query) due to these potential performance issues.

Just add onsubmit event handler for your form:

<form  action="insert.php" onsubmit="return myFunction()" method="post">

Remove onclick from button and make it input with type submit

<input type="submit" value="Submit">

And add boolean return statements to your function:

function myFunction() {
    var pass1 = document.getElementById("pass1").value;
    var pass2 = document.getElementById("pass2").value;
    var ok = true;
    if (pass1 != pass2) {
        //alert("Passwords Do not match");
        document.getElementById("pass1").style.borderColor = "#E34234";
        document.getElementById("pass2").style.borderColor = "#E34234";
        return false;
    }
    else {
        alert("Passwords Match!!!");
    }
    return ok;
}

It looks like you can add it to your ~/.my.cnf, but it needs to be added as an argument to the init-command flag in your [client] section, like so:

[client]
init-command='set autocommit=0'

You want the String.strip(s[, chars]) function, which will strip out whitespace characters or whatever characters (such as '\n') you specify in the chars argument.

See http://docs.python.org/release/2.3/lib/module-string.html

Passing data from Fragment to another Fragment

• From first Fragment

  // Set data to pass
  MyFragment fragment = new MyFragment(); //Your Fragment
  Bundle bundle = new Bundle();
  bundle.putInt("year", 2017)  // Key, value
  fragment.setArguments(bundle); 
  // Pass data to other Fragment
  getFragmentManager()
   .beginTransaction()
   .replace(R.id.content, fragment)
   .commit(); 
  

• On Second Fragment

  @Override
  public void onCreate(@Nullable Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
  
       Bundle bundle = this.getArguments();
       if (bundle != null) {
           Int receivedYear = bundle.getInt("year", ""); // Key, default value
       } 
  }
  

Use the $ metacharacter to match the end of a string.

In Perl, this looks like:

my $str = 'red/white/blue';
my($last_match) = $str =~ m/.*\/(.*)$/;

Written in JavaScript, this looks like:

var str = 'red/white/blue'.match(/.*\/(.*)$/);

I was having 2 values which could contain null values.

while(dr.Read())
 {
    Id = dr["Id"] as int? ?? default(int?);
    Alt =  dr["Alt"].ToString() as string ?? default(string);
    Name = dr["Name"].ToString()
 }

resolved the issue

Since after the pdf file is loaded, the iframe document will have a new DOM element <embed/>, so we can do the check like this:

    window.onload = function () {


    //creating an iframe element
    var ifr = document.createElement('iframe');
    document.body.appendChild(ifr);

    // making the iframe fill the viewport
    ifr.width  = '100%';
    ifr.height = window.innerHeight;

    // continuously checking to see if the pdf file has been loaded
     self.interval = setInterval(function () {
        if (ifr && ifr.contentDocument && ifr.contentDocument.readyState === 'complete' && ifr.contentDocument.embeds && ifr.contentDocument.embeds.length > 0) {
            clearInterval(self.interval);

            console.log("loaded");
            //You can do print here: ifr.contentWindow.print();
        }
    }, 100); 

    ifr.src = src;
}

Figured it out for myself in the end. It is simple, I was just missing the ** operator to unpack the dictionary

So my example becomes:

d = dict(p1=1, p2=2)
def f2(p1,p2):
    print p1, p2
f2(**d)

Please incre max_iter to 10000 as default value is 1000. Possibly, increasing no. of iterations will help algorithm to converge. For me it converged and solver was -'lbfgs'

log_reg = LogisticRegression(solver='lbfgs',class_weight='balanced', max_iter=10000)

Perhaps you need to know how urls are mapped too, since I suffered 404 for hours. There are two kinds of handlers handling requests. BeanNameUrlHandlerMapping and SimpleUrlHandlerMapping. When we defined a servlet-mapping, we are using SimpleUrlHandlerMapping. One thing we need to know is these two handlers share a common property called alwaysUseFullPath which defaults to false.

false here means Spring will not use the full path to mapp a url to a controller. What does it mean? It means when you define a servlet-mapping:

<servlet-mapping>
    <servlet-name>viewServlet</servlet-name>
    <url-pattern>/perfix/*</url-pattern>
</servlet-mapping>

the handler will actually use the * part to find the controller. For example, the following controller will face a 404 error when you request it using /perfix/api/feature/doSomething

@Controller()
@RequestMapping("/perfix/api/feature")
public class MyController {
    @RequestMapping(value = "/doSomething", method = RequestMethod.GET) 
    @ResponseBody
    public String doSomething(HttpServletRequest request) {
        ....
    }
}

It is a perfect match, right? But why 404. As mentioned before, default value of alwaysUseFullPath is false, which means in your request, only /api/feature/doSomething is used to find a corresponding Controller, but there is no Controller cares about that path. You need to either change your url to /perfix/perfix/api/feature/doSomething or remove perfix from MyController base @RequestingMapping.

Missing ; after var_dump($row)

Try IDLE, and use Alt + X to find indentation.

Constructor overloading is like method overloading. Constructors can be overloaded to create objects in different ways.

The compiler differentiates constructors based on how many arguments are present in the constructor and other parameters like the order in which the arguments are passed.

For further details about java constructor, please visit https://tecloger.com/constructor-in-java/

The best approach for this sort of thing is probably git rebase. It allows you to pull changes from master into your development branch, but leave all of your development work "on top of" (later in the commit log) the stuff from master. When your new work is complete, the merge back to master is then very straightforward.

Try adding this line to the xml parent layout

 android:animateLayoutChanges="true"

Your layout will look like this

<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:animateLayoutChanges="true"
    android:longClickable="false"
    android:orientation="vertical"
    android:weightSum="16">

    .......other code here

    </LinearLayout>

You may be looking for

-webkit-appearance: none;

• Safari CSS notes on -webkit-appearance
• Mozilla Developer Network's -moz-appearance

I would suggest to read up a bit on the syntax. See here.

if (dsnt<0.05) {
  wilcox.test(distance[result=='nt'],distance[result=='t'],alternative=c("two.sided"),paired=TRUE) 
} else if (dst<0.05) {
    wilcox.test(distance[result=='nt'],distance[result=='t'],alternative=c("two.sided"),paired=TRUE)
} else 
  t.test(distance[result=='nt'],distance[result=='t'],alternative=c("two.sided"),paired=TRUE)

My contribution:

function serializeToJson(serializer){
    var _string = '{';
    for(var ix in serializer)
    {
        var row = serializer[ix];
        _string += '"' + row.name + '":"' + row.value + '",';
    }
    var end =_string.length - 1;
    _string = _string.substr(0, end);
    _string += '}';
    console.log('_string: ', _string);
    return JSON.parse(_string);
}

var params = $('#frmPreguntas input').serializeArray();
params = serializeToJson(params);

You have two ways:

Lets start by looking for a specific application in my laptop:

[root@pinky:~]# ps fax | grep mozilla
 3358 ?        S      0:00  \_ /bin/sh /usr/lib/firefox-3.5/run-mozilla.sh /usr/lib/firefox-3.5/firefox
16198 pts/2    S+     0:00              \_ grep mozilla

All examples now will look for PID 3358.

First way: Run "ps aux" and grep for the PID in the second column. In this example I look for firefox, and then for it's PID:

[root@pinky:~]# ps aux | awk '{print $2 }' | grep 3358
3358

So your code will be:

if [ ps aux | awk '{print $2 }' | grep -q $PID 2> /dev/null ]; then
    kill $PID 
fi

Second way: Just look for something in the /proc/$PID directory. I am using "exe" in this example, but you can use anything else.

[root@pinky:~]# ls -l /proc/3358/exe 
lrwxrwxrwx. 1 elcuco elcuco 0 2010-06-15 12:33 /proc/3358/exe -> /bin/bash

So your code will be:

if [ -f /proc/$PID/exe ]; then
    kill $PID 
fi

BTW: whats wrong with kill -9 $PID || true ?

EDIT:

After thinking about it for a few months.. (about 24...) the original idea I gave here is a nice hack, but highly unportable. While it teaches a few implementation details of Linux, it will fail to work on Mac, Solaris or *BSD. It may even fail on future Linux kernels. Please - use "ps" as described in other responses.

Mention has been made that before .NET 4.5 the property on the request to access its ServicePointManager was not available.

Here is .NET 4.0 code that will give you access to the ServicePoint on a per-request basis. It doesn't give you access to the per-request callback, but it should let you find out more details about the problem. Just access the scvPoint.Certificate (or ClientCertificate if you prefer) properties.

WebRequest request = WebRequest.Create(uri);

// oddity: these two .Address values are not necessarily the same!
//  The service point appears to be related to the .Host, not the Uri itself.
//  So, check the .Host vlaues before fussing in the debugger.
//
ServicePoint svcPoint = ServicePointManager.FindServicePoint(uri);
if (null != svcPoint)
{
    if (!request.RequestUri.Host.Equals(svcPoint.Address.Host, StringComparison.OrdinalIgnoreCase))
    {
        Debug.WriteLine(".Address              == " + request.RequestUri.ToString());
        Debug.WriteLine(".ServicePoint.Address == " + svcPoint.Address.ToString());
    }
    Debug.WriteLine(".IssuerName           == " + svcPoint.Certificate.GetIssuerName());
}

You need to explicitly tell Java that you wish to multiply.

(x1-x2) * (x1-x2) + (y1-y2) * (y1-y2)

Unlike written equations the compiler does not know this is what you wish to do.

I use the CONCATENATE method to take the values of a column and wrap quotes around them with columns in between in order to quickly populate the WHERE IN () clause of a SQL statement.

I always just type =CONCATENATE("'",B2,"'",",") and then select that and drag it down, which creates =CONCATENATE("'",B3,"'",","), =CONCATENATE("'",B4,"'",","), etc. then highlight that whole column, copy paste to a plain text editor and paste back if needed, thus stripping the row separation. It works, but again, just as a one time deal, this is not a good solution for someone who needs this all the time.

  @echo off & setlocal enableextensions
  rem enabledelayedexpansion
  set S=  This  is  a  test
  echo %S%.
  for /f "tokens=* delims= " %%a in ('echo %S%') do set S=%%a
  echo %S%.
  endlocal & goto :EOF

from http://www.netikka.net/tsneti/info/tscmd079.htm

for removing leading spaces.

To avoid adding extra divs when clicking on the link multiple times, and avoid problems when using the script to display forms, you could try a variation of @jek's code.

$('a.ajax').live('click', function() {
    var url = this.href;
    var dialog = $("#dialog");
    if ($("#dialog").length == 0) {
        dialog = $('<div id="dialog" style="display:hidden"></div>').appendTo('body');
    } 

    // load remote content
    dialog.load(
            url,
            {},
            function(responseText, textStatus, XMLHttpRequest) {
                dialog.dialog();
            }
        );
    //prevent the browser to follow the link
    return false;
});`

I had this problem working with pycurl and I solved it using

c.setopt(pycurl.HTTP_VERSION, pycurl.CURL_HTTP_VERSION_1_0) 

like Eric Caron says.

Ref this

SELECT * FROM product WHERE name REGEXP '[0-9]'

For Windows Forms you can control cursor position (and selection) with txtbox.SelectionStart and txtbox.SelectionLength properties. If you want to set caret to end try this:

txtbox.SelectionStart = txtbox.Text.Length;
txtbox.SelectionLength = 0;

For WPF see this question.

read will return bytes. At least for Python 3, if you want to return a string, you have to decode using the right encoding:

import boto3

s3 = boto3.resource('s3')

obj = s3.Object(bucket, key)
obj.get()['Body'].read().decode('utf-8') 

Update: The GSOC project and the code there isn't active, but this is: https://github.com/hierynomus/sshj

hierynomus took over as maintainer since early 2015. Here is the older, no longer maintained, Github link:

https://github.com/shikhar/sshj

There was a GSOC project:

http://code.google.com/p/commons-net-ssh/

Code quality seem to be better than JSch, which, while a complete and working implementation, lacks documentation. Project page spots an upcoming beta release, last commit to the repository was mid-august.

Compare the APIs:

http://code.google.com/p/commons-net-ssh/

    SSHClient ssh = new SSHClient();
    //ssh.useCompression(); 
    ssh.loadKnownHosts();
    ssh.connect("localhost");
    try {
        ssh.authPublickey(System.getProperty("user.name"));
        new SCPDownloadClient(ssh).copy("ten", "/tmp");
    } finally {
        ssh.disconnect();
    }

http://www.jcraft.com/jsch/

Session session = null;
Channel channel = null;

try {

JSch jsch = new JSch();
session = jsch.getSession(username, host, 22);
java.util.Properties config = new java.util.Properties();
config.put("StrictHostKeyChecking", "no");
session.setConfig(config);
session.setPassword(password);
session.connect();

// exec 'scp -f rfile' remotely
String command = "scp -f " + remoteFilename;
channel = session.openChannel("exec");
((ChannelExec) channel).setCommand(command);

// get I/O streams for remote scp
OutputStream out = channel.getOutputStream();
InputStream in = channel.getInputStream();

channel.connect();

byte[] buf = new byte[1024];

// send '\0'
buf[0] = 0;
out.write(buf, 0, 1);
out.flush();

while (true) {
    int c = checkAck(in);
    if (c != 'C') {
        break;
    }

    // read '0644 '
    in.read(buf, 0, 5);

    long filesize = 0L;
    while (true) {
        if (in.read(buf, 0, 1) < 0) {
            // error
            break;
        }
        if (buf[0] == ' ') {
            break;
        }
        filesize = filesize * 10L + (long) (buf[0] - '0');
    }

    String file = null;
    for (int i = 0;; i++) {
        in.read(buf, i, 1);
        if (buf[i] == (byte) 0x0a) {
            file = new String(buf, 0, i);
            break;
        }
    }

    // send '\0'
    buf[0] = 0;
    out.write(buf, 0, 1);
    out.flush();

    // read a content of lfile
    FileOutputStream fos = null;

    fos = new FileOutputStream(localFilename);
    int foo;
    while (true) {
        if (buf.length < filesize) {
            foo = buf.length;
        } else {
            foo = (int) filesize;
        }
        foo = in.read(buf, 0, foo);
        if (foo < 0) {
            // error
            break;
        }
        fos.write(buf, 0, foo);
        filesize -= foo;
        if (filesize == 0L) {
            break;
        }
    }
    fos.close();
    fos = null;

    if (checkAck(in) != 0) {
        System.exit(0);
    }

    // send '\0'
    buf[0] = 0;
    out.write(buf, 0, 1);
    out.flush();

    channel.disconnect();
    session.disconnect();
}

} catch (JSchException jsche) {
    System.err.println(jsche.getLocalizedMessage());
} catch (IOException ioe) {
    System.err.println(ioe.getLocalizedMessage());
} finally {
    channel.disconnect();
    session.disconnect();
}

}

A simple way to do this could be:

list = {'george':16,'amber':19}
search_age = raw_input("Provide age")
for age in list.values():
    name = list[list==search_age].key().tolist()
    print name

This will return a list of the keys with value that match search_age. You can also replace "list==search_age" with any other conditions statement if needed.

I would like to compliment Ram Narasimhans answer with some tips I found on an Excel blog

Non-uniformly distributed data can be plotted in excel in

• X Y (Scatter Plots)
• Linear plots with Date axis
  • These don't take time into account, only days.
  • This method is quite cumbersome as it requires translating your time units to days, months, or years.. then change the axis labels... Not Recommended

Just like Ram Narasimhan suggested, to have the points centered you will want the mid point but you don't need to move to a numeric format, you can stay in the time format.

1- Add the center point to your data series

+---------------+-------+------+
|    Time       | Time  | Freq |
+---------------+-------+------+
| 08:00 - 09:00 | 08:30 |  12  |
| 09:00 - 10:00 | 09:30 |  13  |
| 10:00 - 11:00 | 10:30 |  10  |
| 13:00 - 14:00 | 13:30 |   5  |
| 14:00 - 15:00 | 14:30 |  14  |
+---------------+-------+------+

2- Create a Scatter Plot

3- Excel allows you to specify time values for the axis options. Time values are a parts per 1 of a 24-hour day. Therefore if we want to 08:00 to 15:00, then we Set the Axis options to:

• Minimum : Fix : 0.33333
• Maximum : Fix : 0.625
• Major unit : Fix : 0.041667

Alternative Display:

Make the points turn into columns:

To be able to represent these points as bars instead of just point we need to draw disjoint lines. Here is a way to go about getting this type of chart.

1- You're going to need to add several rows where we draw the line and disjoint the data

+-------+------+
| Time  | Freq |
+-------+------+
| 08:30 |   0  |
| 08:30 |  12  |
|       |      |
| 09:30 |   0  |
| 09:30 |  13  |
|       |      |
| 10:30 |   0  |
| 10:30 |  10  |
|       |      |
| 13:30 |   0  |
| 13:30 |   5  |
|       |      |
| 14:30 |   0  |
| 14:30 |  14  |
+-------+------+

2- Plot an X Y (Scatter) Chart with Lines.

3- Now you can tweak the data series to have a fatter line, no markers, etc.. to get a bar/column type chart with non-uniformly distributed data.

You can reset the padding (and I think everything else) with initial to the default.

p {
    padding: initial;
}

Procedurally insert "element script" after "element body" is "parse error" by recommended process by W3C. In "Tree Construction" create error and run "tokenize again" to process that content. So it's like additional step. Only then can be runned "Script Execution" - see scheme process.

Anything else "parse error". Switch the "insertion mode" to "in body" and reprocess the token.

Technically by browser it's internal process, how they mark and optimize it.

I hope I helped somebody.

this is the implementation of O(n*lg n) using binary search implementation inside a loop.

#include <iostream>

using namespace std;

bool *inMemory;


int pairSum(int arr[], int n, int k)
{
    int count = 0;

    if(n==0)
        return count;
    for (int i = 0; i < n; ++i)
    {
        int start = 0;
        int end = n-1;      
        while(start <= end)
        {
            int mid = start + (end-start)/2;
            if(i == mid)
                break;
            else if((arr[i] + arr[mid]) == k && !inMemory[i] && !inMemory[mid])
            {
                count++;
                inMemory[i] = true;
                inMemory[mid] = true;
            }
            else if(arr[i] + arr[mid] >= k)
            {
                end = mid-1;
            }
            else
                start = mid+1;
        }
    }
    return count;
}


int main()
{
    int arr[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
    inMemory = new bool[10];
    for (int i = 0; i < 10; ++i)
    {
        inMemory[i] = false;
    }
    cout << pairSum(arr, 10, 11) << endl;
    return 0;
}

Using C# 7.0 we still can't return anonymous types but we have a support of tuple types and thus we can return a collection of tuple (System.ValueTuple<T1,T2> in this case). Currently Tuple types are not supported in expression trees and you need to load data into memory.

The shortest version of the code you want may look like this:

public IEnumerable<(int SomeVariable, object AnotherVariable)> TheMethod()
{
    ...

    return (from data in TheDC.Data
        select new { data.SomeInt, data.SomeObject }).ToList()
        .Select(data => (SomeVariable: data.SomeInt, AnotherVariable: data.SomeObject))
}

Or using the fluent Linq syntax:

return TheDC.Data
    .Select(data => new {SomeVariable: data.SomeInt, AnotherVariable: data.SomeObject})
    .ToList();
    .Select(data => (SomeVariable: data.SomeInt, AnotherVariable: data.SomeObject))

Using C# 7.1 we can omit properties names of tuple and they will be inferred from tuple initialization like it works with anonymous types:

select (data.SomeInt, data.SomeObject)
// or
Select(data => (data.SomeInt, data.SomeObject))

I use the following (both are work in progress, so I'll try to remember to update this):

# Add All and Commit
  aac = !echo "Enter commit message:" && read MSG && echo "" && echo "Status before chagnes:" && echo "======================" && git status && echo "" && echo "Adding all..." && echo "=============" && git add . && echo "" && echo "Committing..." && echo "=============" && git commit -m \"$MSG\" && echo "" && echo "New status:" && echo "===========" && git status

# Add All and Commit with bumpted Version number
  aacv = !echo "Status before chagnes:" && echo "======================" && git status && echo "" && echo "Adding all..." && echo "=============" && git add . && echo "" && echo "Committing..." && echo "=============" && git commit -m \"Bumped to version $(head -n 1 VERSION)\" && echo "" && echo "New status:" && echo "===========" && git status

With the echo "Enter commit message:" && read MSG part inspired by Sojan V Jose

I'd love to get an if else statement in there so I can get aacv to ask me if I want to deploy when it's done and do that for me if I type 'y', but I guess I should put that in my .zshrc file

Given:

A_1 = [10 200 7 150]';
A_2 = [0.001 0.450 0.007 0.200]';

(As others have already pointed out) There are tools to simply compute correlation, most obviously corr:

corr(A_1, A_2);  %Returns 0.956766573975184  (Requires stats toolbox)

You can also use base Matlab's corrcoef function, like this:

M = corrcoef([A_1 A_2]):  %Returns [1 0.956766573975185; 0.956766573975185 1];
M(2,1);  %Returns 0.956766573975184 

Which is closely related to the cov function:

cov([condition(A_1) condition(A_2)]);

As you almost get to in your original question, you can scale and adjust the vectors yourself if you want, which gives a slightly better understanding of what is going on. First create a condition function which subtracts the mean, and divides by the standard deviation:

condition = @(x) (x-mean(x))./std(x);  %Function to subtract mean AND normalize standard deviation

Then the correlation appears to be (A_1 * A_2)/(A_1^2), like this:

(condition(A_1)' * condition(A_2)) / sum(condition(A_1).^2);  %Returns 0.956766573975185

By symmetry, this should also work

(condition(A_1)' * condition(A_2)) / sum(condition(A_2).^2); %Returns 0.956766573975185

And it does.

I believe, but don't have the energy to confirm right now, that the same math can be used to compute correlation and cross correlation terms when dealing with multi-dimensiotnal inputs, so long as care is taken when handling the dimensions and orientations of the input arrays.

Apart from the ones mentioned above, your CUDA installations path (if not changed during setup) typically contains the version number

doing a which nvcc should give the path and that will give you the version

PS: This is a quick and dirty way, the above answers are more elegant and will result in the right version with considerable effort

Enhancement of Ben Brandt's answer to compensate even if the string starts with space by applying LTRIM(). Tried to edit his answer but rejected, so I am now posting it here separately.

DECLARE @test NVARCHAR(255)
SET @test = 'First Second'

SELECT SUBSTRING(LTRIM(@test),1,(CHARINDEX(' ',LTRIM(@test) + ' ')-1))

Try FieldUtils from apache commons-lang3:

FieldUtils.readField(object, fieldName, true);

This can be easily done using the tags

The example of tags is defined below:

---
hosts: localhost
tasks:
 - name: Creating s3Bucket
   s3_bucket:
        name: ansiblebucket1234567890
   tags: 
       - createbucket

 - name: Simple PUT operation
   aws_s3:
       bucket: ansiblebucket1234567890
       object: /my/desired/key.txt
       src: /etc/ansible/myfile.txt
       mode: put
   tags:
      - putfile

 - name: Create an empty bucket
   aws_s3:
       bucket: ansiblebucket12345678901234
       mode: create
       permission: private
   tags:
       - emptybucket

to execute the tags we use the command

ansible-playbook creates3bucket.yml --tags "createbucket,putfile"

Run this

    for (Method m : sex.class.getDeclaredMethods()) {
        System.out.println(m);
    }

you will see

public static test.Sex test.Sex.valueOf(java.lang.String)
public static test.Sex[] test.Sex.values()

These are all public methods that "sex" class has. They are not in the source code, javac.exe added them

Notes:

1. never use sex as a class name, it's difficult to read your code, we use Sex in Java

2. when facing a Java puzzle like this one, I recommend to use a bytecode decompiler tool (I use Andrey Loskutov's bytecode outline Eclispe plugin). This will show all what's inside a class

You can go with @greenAfrican example, if it's possible for you to rewrite your function. But if you don't want to rewrite your function, you can wrap it into anonymous function inside apply, like this:

>>> def fxy(x, y):
...     return x * y

>>> df['newcolumn'] = df.apply(lambda x: fxy(x['A'], x['B']), axis=1)
>>> df
    A   B  newcolumn
0  10  20        200
1  20  30        600
2  30  10        300

Old style classes are still marginally faster for attribute lookup. This is not usually important, but it may be useful in performance-sensitive Python 2.x code:

In [3]: class A:
   ...:     def __init__(self):
   ...:         self.a = 'hi there'
   ...:

In [4]: class B(object):
   ...:     def __init__(self):
   ...:         self.a = 'hi there'
   ...:

In [6]: aobj = A()
In [7]: bobj = B()

In [8]: %timeit aobj.a
10000000 loops, best of 3: 78.7 ns per loop

In [10]: %timeit bobj.a
10000000 loops, best of 3: 86.9 ns per loop

More than likely your method declaration is incorrect. Make sure the methods parameter is of type String array (String[]) and not simply String and that you use double quotes around your strings in the array declaration.

private String[] stringArray = {"a","b","c","d","e","f","g","h","t","k","k","k"};
public void myMethod(String[] myArray) {}

The PHP function echo() prints out its input to the web server response.

echo("Hello World!");

prints out Hello World! to the web server response.

echo("<prev>");

prints out the tag to the web server response.

echo do not require valid HTML tags. You can use PHP to print XML, images, excel, HTML and so on.

<prev> is not a HTML tag. Is is a valid XML tag, but since I don't know what page you are working in, i cannot tell you what it is. Maybe it is the root tag of a XML page, or a miswritten <pre> tag.

If you are using pandas you can access the index by calling .index of whatever array you wish to mimic. The train_test_split carries over the pandas indices to the new dataframes.

In your code you simply use x1.index and the returned array is the indexes relating to the original positions in x.