- Drag and Drop: Copy and Move elements with DataTransferItemList interface. Select this element and drag to the Copy Drop Zone.
- Setting, copying, and moving message elements by using a JavaCompute node Transform elements in the message as it passes through a JavaCompute node in the message flow.
The STL algorithms offer a powerful way to solve some base programming use cases. If you know and use these algorithms you can write more clean, efficient and robust code. But unfortunately, it isn’t that easy to know or find the right algorithm for a use case. In my opinion, this is a result of the not practical kind of documentation – especially grouping of the algorithms is not related to practice – and on the other hand the unfavorable naming of some functions. Therefore, I write this series of articles and want to give a more practice-related overview about the STL algorithms.
Array can be copied by iterating over array, and one by one assigning elements. We can avoid iteration over elements using clone or System.arraycopy clone creates a new array of same size, but System.arraycopy can be used to copy from a source range to a destination range. Having a 'Template' overlay, where you can set certain elements, and it will mirror between all overlays that use this template. Layers: use these as folders. Clicking on a layer will expand the properties. Option to have text size autosize to fit in defined zone. Select and move multiple things at the same time. For the copy option, the starting node and element IDs of the new elements can be automatically assigned by LS-PrePost or controlled by the user. Controls: Move - Move elements to a target part; Copy - Copy elements to a target part; Pick Target Part - Pick target part from drawing area; PID - Enter target part ID.
Within this article I want to give an overview about the STL algorithms to copy, move and remove container elements. This is one of a series of articles. Within each of these blog post I want to summarize the STL algorithms regarding one kind of use case.
Each section contains a list of the according STL algorithms with a short description. Additional you will find an example implementation which will show some of these algorithms. If you copy and execute the examples, you will see the results within the console window. Additional, you will see the results as comment within the source code.
Most of the standard algorithms take half-open sequences. “Half-open” means the start iterator refers to the first element of the sequence and the end iterator refers to the element behind the last element. Returning the end iterator of the sequence to indicate “not found” is a standard-library convention.
Copy container elements
| Algorithm | Description |
| copy | Copy elements to new location. The elements are given by start-iterator and end-iterator. |
| copy_n | Copy elements to new location. The elements are given by a start-iterator and an element number. |
| copy_if | Copy elements to new location if they match the given condition. |
| copy_backward | Copy elements to the new location. The new location is given as end-iterator and the elements will be placed in front of this end-iterator. The element order is not changed. Therefore, the name “copy_backward” is some kind of misleading and one may mix up “copy_backward” and “reverse_copy”. In my opinion, a better name would be “copy_to_end”. |
| reverse_copy | Copy elements in reverse order to new location. |
| rotate_copy | Copy elements to new location and rotate elements according a given new start-iterator. Example: Rotate copy of container “1 2 3 4” with new start-iterator “3” results in “3 4 1 2”. |
| unique_copy | Copy elements to new location and exclude consecutive equal elements. The name of the function is misleading as the target container may contain an element several times. “unique_copy” only removes equal elements if they are placed in consecutive order. Example: Unique copy of container “1 2 2 2 3 2” will result in “1 2 3 2”. |
| remove_copy | Copy elements to new location. Does not copy elements according a given comparison element. |
| remove_copy_if | Copy elements to new location. Does not copy elements according a given comparison predicate. |
| replace_copy | Copy elements to new location. Replaces elements according a given comparison element with a new element. |
| replace_copy_if | Copy elements to new location, replaces elements according a given comparison predicate with a new element. |
| transform | Copy elements to new location. The new element will be created according the given transformation function. The naming isn’t consistent in this case. The function should be named “transform_copy” but in this case the “transform” function exists which can be used for other use cases too. |
| partial_sort_copy | copy elements to new location and sorts them ascending or according given sort function, the new location may be smaller than the sorce container, in this case only the first x elements are copied -> e.g. source: 1,4,3,2,5 -> target container has size 3 -> result is „1,2,3“ |
| partition_copy | Copy elements to two new locations. Each target contains one of the two partitions. The first target container contains all elements where the partition predicate is “true” and the second target container contains all elements where the partition predicate is “false”. |
Move container elements
| Algorithm | Description |
| move | Move elements to new location. |
| move_backward | Move elements to new location. The new location is given as end-iterator and the elements will be placed in front of this end-iterator. The element order is not changed. Therefore, the name “move_backward” is some kind of misleading as one may think the function will reverse the order of the elements. In my opinion, a better name would be “move_to_end”. |
The move algorithms will copy elements – so they remain within the source container – but they will use move semantic. Therefore, the origin elements within the source container may get changed. For example, the move ctor of the elements could be implemented in a way to steal resources and set the element member of the origin element to nullptr. Therefore, a move will normally be implemented in case the source container is no longer needed.
Remove container elements
| Algorithm | Description |
| remove | Removes the elements matching a given value. Removing is done by shifting. The function returns an according new end iterator. |
| remove_if | Removes the elements matching a given condition. Removing is done by shifting. The function returns an according new end iterator. |
| unique | Removes equivalent consecutive elements except the first one. Removing is done by shifting. The function returns an according new end iterator. Attention: The name “unique” is misleading. After a call of this function the container may still contains equal elements. The unique algorithms delete them only if they are placed in on consecutive positions. |
Move And Copy Elements Diagram
Attention: All remove algorithms do not really delete elements. They shift the elements only and return a new end-iterator. The elements between this new logical end-iterator and the physical end are still accessible but have unspecified values. Therefore, after call of a remove algorithm you must call erase to delete the unspecified values. So, the remove algorithms are dangerous as they are incomplete functions. You must call erase explicitly to finish the deletion procedure.
The Move tool lets you cut and drag a pixel selection to a new location in the photo. You can also use the tool to move or copy selections between photos in Photoshop Elements, and to photos in other applications that support selections.
Move And Copy Elements Definition
Note:
To activate the Move tool when another tool is selected, hold down Ctrl (Command in Mac OS). (This technique does not work when the Hand tool is selected.)
In the Edit workspace, make a selection with a selection tool and select the Move tool from the toolbox.
- (Optional)Change Move tool settings in the options bar.
- Move the pointer inside the selection border, and dragthe selection to a new position. If you’ve selected multiple areas,all pixel selections move as you drag.
When you select the Move tool, you can change the following settings in the options bar:
Selects the topmost layer that has pixels under the Move tool cursor, rather than the currently selected layer.
Displays the bounding box around the selection in the image, or around the currently selected layer (if there is no active selection on the image). The boxes on the sides and corners allow you to resize the selection or layer.
Move And Copy Elements Pdf
Note:
A bounding box is not visible for a Background layer.
Highlights individual layers as the mouse hovers over theimage. Click on a highlighted layer to select and move it. Layersthat are already selected do not highlight on rollover.
Moves the selected layer in front, in between, or in backof other layers. Options include Bring To Front, Bring Forward,Send Backward, and Send To Back. To arrange a layer, select thelayer, and then choose an item from the Arrange menu.
Aligns the selected layers. Options include Top Edges, Vertical Centers,Bottom Edges, Left Edges, Horizontal Centers, and Right Edges. Multiple layerscan be aligned simultaneously. To align layers, select a layer,hold down Shift, select another layer, and then choose an item fromthe Align menu.
Spaces selected layers equally apart. Options include Top Edges, Vertical Centers, Bottom Edges, Left Edges, Horizontal Centers, and Right Edges. Multiple layers can be spaced simultaneously. For this option to be enabled, you must have a minimum of three selected layers. To space layers apart, select a layer, hold down Shift, select other layers, and then choose an item from the Distribute menu.
You can copy and paste selections using the Move tool or the Copy, Copy Merged, Cut, Paste, or Paste Into Selection commands in the Edit menu.
Keep in mind that when a selection or layer is pasted between photos with different resolutions, the pasted data retains its original pixel dimensions. This can make the pasted portion appear out of proportion to the new image. Use the Image > Resize > Image Size command to make the source and destination photos the same resolution before copying and pasting.
Selections that you cut or copy are stored in the clipboard. Only one selection is stored in the clipboard at a time.
When copying between photos, drag the selectionfrom the active image window into the other image window. A borderhighlights the image window when you can drop the selection intoit.
- In the Edit workspace, select the Move tool fromthe toolbox.
- Press Alt (Option in Mac OS) while dragging the selectionyou want to copy and move.
- To make additional copies of the same selection, do oneof the following:
- Hold down Alt (Option in Mac OS) whiledragging the selection to each new location.
- To offset the duplicate by 1 pixel, hold down Alt(Option in Mac OS), and press an arrow key. (This moves the pixelsand copies the pixels, creating a blur effect.)
- To offset the duplicate by 10 pixels, press Alt(Option in Mac OS) + Shift and press an arrow key. (This moves thepixels rather than copying them.)
Note:
When you drag a selection (with Shift key pressed) from one image to another image, the selection is pasted at the center.
- Inthe Edit workspace, use a selection tool to select the area youwant to copy.
- Choose Edit > Copy to copy the selection to the clipboard.
- Choose Edit > Copy Merged to copy all layers in the selected area to the clipboard.
You can use the Paste Into Selection command to paste clipboard, or copied content, within a selection. This command lets you take advantage of elements within the selected area and prevent the pasted image from looking flat and unnatural. For example, you can use a Hard Light blending mode at 85% opacity to retain the reflection in a pair of sunglasses. When using blending modes this way, you need to create a new layer and paste the selection into that layer.
A. Part of the original photo selected B. Phototo copy and paste into original C. Resultingimage
- In the Edit workspace, use the Copy command tocopy the part of the photo you want to paste. (You can even copyfrom photos in other applications.)
- Make a selection in the photo into which you want topaste the copied photo.
Note:
The copied photo appears only within the selection border.You can move the copied photo within the border, but if you moveit completely out of the border, it won’t be visible.
- With your pointer within the selection border, drag thepasted image to the proper location.
- When you’re satisfied with the results, deselect thepasted image to commit the changes.
Note:
To activate the Move tool when anothertool is selected, hold down Ctrl (Command in Mac OS). (This techniquedoes not work with the Hand tool.)
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