size

How to find file size in scala?

▼魔方 西西 提交于 2019-12-03 11:12:55
I'm writing a scala script, that need to know a size of a file. How do I do this correctly? In Python I would do os.stat('somefile.txt').st_size and in Scala? lreeder There is no way to do this using the Scala standard libraries. Without resorting to external libraries, you can use the Java File.length() method do do this. In Scala, this would look like: import java.io.File val someFile = new File("somefile.txt") val fileSize = someFile.length If you want something Scala-specific, you can use an external framework like scalax.io or rapture.io import java.io.File; val file:File = new File("your

Set width of Button in Android

喜你入骨 提交于 2019-12-03 10:17:05
How can I set a fixed width for an Android button? Everytime I try to set a fixed width it fills the current parent (the RelativeView). Here is my XML: <?xml version="1.0" encoding="utf-8"?> <RelativeLayout android:id="@+id/relativelayout" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android"> <EditText android:layout_height="wrap_content" android:editable="false" android:layout_width="fill_parent" android:id="@+id/output"></EditText> <Button android:layout_height="wrap_content" android:id="@+id/Button01" android

Get size of String w/ encoding in bytes without converting to byte[]

谁说我不能喝 提交于 2019-12-03 10:07:28
I have a situation where I need to know the size of a String /encoding pair, in bytes, but cannot use the getBytes() method because 1) the String is very large and duplicating the String in a byte[] array would use a large amount of memory, but more to the point 2) getBytes() allocates a byte[] array based on the length of the String * the maximum possible bytes per character. So if I have a String with 1.5B characters and UTF-16 encoding, getBytes() will try to allocate a 3GB array and fail, since arrays are limited to 2^32 - X bytes (X is Java version specific). So - is there some way to

How to do one-way ANOVA in R with unequal sample sizes?

☆樱花仙子☆ 提交于 2019-12-03 09:29:01
问题 Trying to learn R. A question from an old stats text want's to know if there is a difference in break times at different construction sites. Trouble is, the text decided that each site employs a different number of workers. So, I am stuck and looking for help using ANOVA with unequal sample sizes. site1 <- c(34,25,27,31,26,34,21) site2 <- c(33,35,31,31,42,33) site3 <- c(17,30,30,26,32,28,26,29) site4 <- c(28,33,31,27,32,33,40) 回答1: Try this one site1 <- c(34,25,27,31,26,34,21) site2 <- c(33

Oracle - How do I get the actual size of a specific ROW?

江枫思渺然 提交于 2019-12-03 09:16:33
问题 Is this possible? Or at least I'm looking to have a list of the size of all rows in a table. 回答1: select vsize(col1) + vsize(col2) + vsize(col3) + long_raw_length_function(long_col) + DBMS_LOB.GETLENGTH(blob_col) from table where id_col = id_val; for the long_raw_length_function , see this Get the LENGTH of a LONG RAW 回答2: if you're interested in the average row length, you could analyze the table (with the DBMS_STATS package), then query ALL_TABLES.avg_row_len . 回答3: Here below is the query

Is there an alternative to background-size:cover?

亡梦爱人 提交于 2019-12-03 09:10:43
When using Chrome in particular, it creates a significant scrolling lag and also affects animations on the page and makes them stutter really badly. So is there an alternative to background-size:cover? I have tried a couple things including the plugin jQuery backstretch but it actually created just as much lag as background-size:cover. I searched for this forever, and I finally figured this out. It's only a solution for mobile, however. (Sorry for reviving an old post): /* portrait */ @media screen and (orientation:portrait) { .box{ /* portrait-specific styles */ background-size: auto 100%; }

System bar size on android tablets

二次信任 提交于 2019-12-03 09:01:48
I've got the problem that I need the height of the android tablet system bar. It's the same problem as over here , but I cant use this answer, because it gives me the same size as from the DisplayMetrics. At both ways I get the resolution with this bar allready calculated in it. (This problem doesnt appear at my smartphone, just on my tablet). // status bar (at the top of the screen on a Nexus device) public static int getStatusBarHeight(Context context) { Resources resources = context.getResources(); int resourceId = resources.getIdentifier("status_bar_height", "dimen", "android"); if

What am I missing from this K&amp;R sample?

匿名 (未验证) 提交于 2019-12-03 08:59:04
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: The following is an excerpt from a code sample in K&R's The C Programming Language (section 8.7): typedef long Align; union header { struct { union header *ptr; unsigned size; } s; Align x; }; typedef union header Header; And here is the explanatory excerpt: To simplify alignment, all blocks are multiples of the header size, and the header is aligned properly. This is achieved by a union that contains the desired header structure and an instance of the most restrictive type, which we have arbitrarily made a long. So, as I understand it, the

Java heap size not entirely used

[亡魂溺海] 提交于 2019-12-03 08:52:27
问题 I'm currently monitoring my running java application with Visual VM: http://visualvm.java.net/ I'm stressing the memory usage by with -Xmx128m. When running I see the heap size increasing to 128m (as expected) however the used heap converges to approximately 105m before I run into a java heap space error. Why are these remaining 20m, not used? 回答1: The heap is split up in Young-Generation (Eden-Space, and two Survivor-Spaces of identical size usually called From and To), Old Generation

What is the maximum size limit of varchar data type in sqlite?

ぃ、小莉子 提交于 2019-12-03 07:27:56
问题 I'm new to sqlite. I want to know the maximum size limit of varchar data type in sqlite? can anybody suggest me some information related to this? I searched on sqlite.org site and they give the answer as: Q. What is the maximum size of a VARCHAR in SQLite? A. SQLite does not enforce the length of a VARCHAR. You can declare a VARCHAR(10) and SQLite will be happy to let you put 500 characters in it. And it will keep all 500 characters intact - it never truncates. but I want to know the exact