size

Does clearing a vector affect its capacity?

回眸只為那壹抹淺笑 提交于 2019-11-26 16:58:12
问题 I instantiate an std::vector foo(1000) . foo.size() is now 1000 and foo.capacity() is also 1000. If I clear the vector with foo.clear() , the size() is now 0, but what is the capacity() ? Does the standard say anything about that? 回答1: No, it doesn't. The capacity of a vector never decreases. That isn't mandated by the standard but it's so both in standard library implementations of VC++ and g++. In order to set the capacity just enough to fit the size, use the famous swap trick vector<T>()

How to add a condition to the geom_point size?

蓝咒 提交于 2019-11-26 16:40:30
问题 I am trying to add a condition to geom_point size and I've pasted my example below. I would like geom_point size to be 2 when n_in_stat is 4 or more, and size = 5 when n_in_stat is less than 4. I tried putting an ifelse statement inside the geom_point, but this failed. Perhaps I can't include logical operators here and I have to create a new column in the data.frame and set the size to that? geom_point(size = ifelse(n_in_stat < 4, 5, 2)) + # trying to set size with an ifelse geom_point(aes

How to change the size of the font of a JLabel to take the maximum size

大憨熊 提交于 2019-11-26 16:14:31
I have a JLabel in a Container. The defaut size of the font is very small. I would like that the text of the JLabel to take the maximum size. How can I do that? coobird Not the most pretty code, but the following will pick an appropriate font size for a JLabel called label such that the text inside will fit the interior as much as possible without overflowing the label: Font labelFont = label.getFont(); String labelText = label.getText(); int stringWidth = label.getFontMetrics(labelFont).stringWidth(labelText); int componentWidth = label.getWidth(); // Find out how much the font can grow in

Size of font in CSS with slash

拥有回忆 提交于 2019-11-26 16:06:51
What does the slash mean here: font: 100%/120%; This actually sets two properties and is equivalent to: font-size: 100%; line-height: 120%; To quote the official documentation : The syntax of this property is based on a traditional typographical shorthand notation to set multiple properties related to fonts. As David M said in the comments, it mirrors the typesetting tradition of specifying typeface sizes as “ x  pt on y  pt” to denote the glyph size on line height. But the example in your question is actually wrong and would be ignored by the browser: you can only combine these two properties

$_FILE upload large file gives error 1 even though upload_max_size is bigger than the file size

白昼怎懂夜的黑 提交于 2019-11-26 16:06:41
问题 I have a simple upload form with: enctype="multipart/form-data"/> and input type="hidden" name="MAX_FILE_SIZE" value="5900000" /> And the following settings, that are applied (checked through phpini()) in php.ini: upload_max_filesize = 7MB memory_limit = 64M post_max_size = 8MB I try to upload a file that is small - 500k and it goes through I try to upload a file that is 5MB (smaller than both upload_max_filesize and post_max_size settings) and it fails with error code 1: which says is:

链表栈C语言实现

白昼怎懂夜的黑 提交于 2019-11-26 15:47:14
#ifndef LINKSTACK_H_INCLUDED #define LINKSTACK_H_INCLUDED #include <stdlib.h> #include <stdio.h> //链式栈的结点 typedef struct LINKNODE { struct LINKNODE *next; }LinkNode; //链式栈 typedef struct LINKSTACK { LinkNode head; int size; }LinkStack; //初始化函数 LinkStack *Init_LinkStack(); //入栈 void Push_LinkStack(LinkStack *stack, LinkNode *data); //出栈 void Pop_LinkStack(LinkStack *stack); //返回栈顶元素 LinkNode* Top_LinkStack(LinkStack *stack); //返回栈元素的个数 int Size_LinkStack(LinkStack *stack); //清空栈 void Clear_LinkStack(LinkStack *stack); //销毁 void FreeSpace_LinkStack(LinkStack *stack); #endif // LINKSTACK_H

How to know the size of the string in bytes?

佐手、 提交于 2019-11-26 15:36:39
问题 I'm wondering if I can know how long in bytes for a string in C#, anyone know? 回答1: You can use encoding like ASCII to get a character per byte by using the System.Text.Encoding class. or try this System.Text.ASCIIEncoding.Unicode.GetByteCount(string); System.Text.ASCIIEncoding.ASCII.GetByteCount(string); 回答2: From MSDN: A String object is a sequential collection of System.Char objects that represent a string. So you can use this: var howManyBytes = yourString.Length * sizeof(Char); 回答3:

WPF: How to display an image at its original size?

旧街凉风 提交于 2019-11-26 15:33:22
问题 I have a problem with displaying images in WPF. Here's my code: <Button HorizontalAlignment="Left" Grid.Column="1" Grid.Row="5" Margin="0,5"> <Button.Content> <StackPanel Orientation="Horizontal" Margin="10,0"> <Image Source="/images/user_add.png" Stretch="None" HorizontalAlignment="Center" VerticalAlignment="Center" Width="24" Height="24" /> <TextBlock Text="添加" /> </StackPanel> </Button.Content> </Button> I have an image with original size 32*32, but when I ran the above code, the image

Cursor size limit in Android SQLiteDatabase

試著忘記壹切 提交于 2019-11-26 15:26:22
I download a db from internet. I save it in my datases folder and I open it. Inside the db there is a table "Ads" with 6 fields. 2 of these fields are BLOB. When I want to read from this table... I have some problem... I noticed that when I read a row with a blob field more bigger than 1 mega byte, this causes an exception... "get field slot from row 0 col 0 failed". if it's a little blob, all is ok... thanks in advance :) There's a limit of 1MB on internal assets due to dynamic decompression; the 1MB limit also seems to apply to Cursor blobs but this doesn't seem to be documented anywhere.

Java JTable setting Column Width

心不动则不痛 提交于 2019-11-26 15:25:21
问题 I have a JTable in which I set the column size as follows: table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); table.getColumnModel().getColumn(0).setPreferredWidth(27); table.getColumnModel().getColumn(1).setPreferredWidth(120); table.getColumnModel().getColumn(2).setPreferredWidth(100); table.getColumnModel().getColumn(3).setPreferredWidth(90); table.getColumnModel().getColumn(4).setPreferredWidth(90); table.getColumnModel().getColumn(6).setPreferredWidth(120); table.getColumnModel().getColumn