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ValueError: invalid literal for int() with base 10: ''
I am creating a program that reads a file and if the first line of the file is not blank, it reads the next four lines. Calculations are performed on those lines and then the next line is read. If that line is not empty it continues. However, I am getting this error:
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How do I check if an index exists on a table field in MySQL?
...me instead of Key_name, this way you don't need to find out the index name if it is automatically added without name.
– Programista
Apr 9 '14 at 11:05
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How do you get a timestamp in JavaScript?
...ny alteration).
Details:
On almost all current browsers you can use Date.now() to get the UTC timestamp in milliseconds; a notable exception to this is IE8 and earlier (see compatibility table).
You can easily make a shim for this, though:
if (!Date.now) {
Date.now = function() { return new ...
Find a value in an array of objects in Javascript [duplicate]
I know similar questions have been asked before, but this one is a little different. I have an array of unnamed objects, which contain an array of named objects, and I need to get the object where "name" is "string 1". Here is an example array.
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iTunes Connect: How to choose a good SKU?
...t has to be unique.
Every time I have to enter the SKU I use the App identifier (e.g. de.mycompany.myappname) because this is already unique.
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AsyncProcedures异步过程扩展 · App Inventor 2 中文网
...完成后的回调
when AsyncProcedures1.ProcedureCompleted
do
show notification "异步过程执行完成"
带参数的异步过程
// 异步执行带参数的过程
when ProcessDataButton.Click
do
// 传递参数给异步过程
call AsyncProcedures1.RunProcedu...
Total size of the contents of all the files in a directory [closed]
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If you want the 'apparent size' (that is the number of bytes in each file), not size taken up by files on the disk, use the -b or --bytes option (if you got a Linux system with GNU coreutils):
% du -sbh <directory>
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How to sum array of numbers in Ruby?
... array.map(&:price).inject(0, :+) is a bit safer. It makes sure that if you have an empty list you get 0 instead of nil.
– johnf
Oct 4 '11 at 9:21
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How do I tell Gradle to use specific JDK version?
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If you are executing using gradle wrapper you can also do it like ./gradlew -Dorg.gradle.java.home=/path_to_jdk_directory. Good if you don't want to touch gradle.properties.
– david.schreiber
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List of lists into numpy array
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If your list of lists contains lists with varying number of elements then the answer of Ignacio Vazquez-Abrams will not work. Instead there are at least 3 options:
1) Make an array of arrays:
x=[[1,2],[1,2,3],[1]]
y=numpy.a...