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How do you read from stdin?
...t():
pass
fileinput will loop through all the lines in the input specified as file names given in command-line arguments, or the standard input if no arguments are provided.
Note: line will contain a trailing newline; to remove it use line.rstrip()
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What is Java String interning?
...gs will ensure that all strings having same contents share same memory. So if you have list of names where 'john' appears 1000 times, by interning you ensure only one 'john' is actually allocated memory.
This can be useful to reduce memory requirements of your program. But be aware that the cache i...
Popup弹出菜单扩展 · App Inventor 2 中文网
...AutoCheck，Checked是当前的新的选中状态。
为了节省大量的if... else if... else块，前五个菜单项的点击事件作为单独的事件可用。MenuItemSelected在MenuItemSelected之前触发。
属性
锚点组件
指定弹出菜单显示在其下...
Automatic exit from bash shell script on error [duplicate]
I've been writing some shell script and I would find it useful if there was the ability to halt the execution of said shell script if any of the commands failed. See below for an example:
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SQL update trigger only when column is modified
...t it doesn't seem to work as I would like: I want it to only update the modified information if the QtyToRepair value has been updated... but it doesn't do that.
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Show which git tag you are on?
...ler command works perfectly:
git describe --tags
(Or without the --tags if you have checked out an annotated tag. My tag is lightweight, so I need the --tags.)
original answer follows:
git describe --exact-match --tags $(git log -n1 --pretty='%h')
Someone with more git-fu may have a more eleg...
The default for KeyValuePair
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Try this:
if (getResult.Equals(new KeyValuePair<T,U>()))
or this:
if (getResult.Equals(default(KeyValuePair<T,U>)))
share
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LinkedBlockingQueue vs ConcurrentLinkedQueue
...ce for producer/consumer queues IMO. You'd have to call poll(), wait a bit if you hadn't found anything, and then poll again etc... leading to delays when a new item comes in, and inefficiencies when it's empty (due to waking up unnecessarily from sleeps).
From the docs for BlockingQueue:
Block...
File being used by another process after using File.Create()
I'm trying to detect if a file exists at runtime, if not, create it. However I'm getting this error when I try to write to it:
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How to remove an item for a OR'd enum?
...ssentially reverses or 'flips' all bits for the given data type. As such, if you use the AND operator (&) with some value (let's call that value 'X') and the complement of one or more set bits (let's call those bits Q and their complement ~Q), the statement X & ~Q clears any bits that were ...