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How to find all occurrences of a substring?
Python has string.find() and string.rfind() to get the index of a substring in a string.
20 Answers
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How do you see the entire command history in interactive Python?
I'm working on the default python interpreter on Mac OS X, and I Cmd + K (cleared) my earlier commands. I can go through them one by one using the arrow keys. But is there an option like the --history option in bash shell, which shows you all the commands you've entered so far?
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Is it possible to use Visual Studio on macOS?
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yeah, they're not quite the same, VS for Mac is closer to Xamarin Studio. But it is what Microsoft has released as the VS experience for mac :)
– vyedin
Dec 12 '16 at 22:21
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How to set default browser window size in Protractor/WebdriverJS
For some reason when I run my tests at work the browser is maximized, but when I run them at home it only opens a browser window of about 50% width. This causes some discrepancies with scrolling down, etc, so I'd ideally like to have it open a browser window of the same size on every machine the tes...
What is in your Mathematica tool bag? [closed]
...ca is great, but it also often lacks critical functionality. What kind of external packages / tools / resources do you use with Mathematica?
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Changing password with Oracle SQL Developer
Many of my users do not use SQLPlus. I cannot give them alter user. We expire passwords every 60 days.
14 Answers
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Maximum Java heap size of a 32-bit JVM on a 64-bit OS
The question is not about the maximum heap size on a 32-bit OS, given that 32-bit OSes have a maximum addressable memory size of 4GB, and that the JVM's max heap size depends on how much contiguous free memory can be reserved.
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How do you format an unsigned long long int using printf?
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This isn't a Linux/UNIX thing, the "ll" length modifier was added to Standard C in C99, if it doesn't work in "Microsoft C" then it is because they are not standards compliant.
– Robert Gamble
Oct 17 '08...
App Inventor 2 向心力实验App - 探究向心力F与角速度ω、半径r、质量m的关...
...，实现低成本、高精度的向心力探究实验。
1.1 与 phyphox 的区别
phyphox（德国亚琛工业大学开发）可以测量向心加速度 a = r · ω²，但存在以下局限：
对比项phyphox 离心加速度实验本App（向心力实验）测量物理量向心加速度...
Get Image size WITHOUT loading image into memory
...er data"
There are a few file operations in the source like:
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prefix = fp.read(16)
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fp.seek(0)
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but these hardly constitute reading the whole file. In fact .open simply returns a file object and the filename on success. In addition the docs say:
open(file, mode=”r”)
O...