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How to run a shell script on a Unix console or Mac terminal?
...rences such as is the case between sh and bash).
A note on /usr/bin/env
Most commonly, you'll see hash bangs like so:
#!/bin/bash
The result is that the kernel will run the program /bin/bash to interpret the script. Unfortunately, bash is not always shipped by default, and it is not always ava...
Setting custom UITableViewCells height
... buttons and image views to be displayed. There is one label in the cell whose text is a NSString object and the length of string could be variable. Due to this, I cannot set a constant height to the cell in the UITableView 's heightForCellAtIndex method. The cell's height depends on the label'...
Fast check for NaN in NumPy
...e of NaNs than in their absence. It also seems to get slower as NaNs get closer to the start of the array. On the other hand, sum's throughput seems constant regardless of whether there are NaNs and where they're located:
In [40]: x = np.random.rand(100000)
In [41]: %timeit np.isnan(np.min(x))
100...
Supabase 拓展：App 接入 Supabase 后端服务（Auth + PostgreSQL + Storage...
...端数据、文件上传下载和后端业务逻辑的 App。
Supabase 是一个开源的 Firebase 替代品，基于 PostgreSQL 构建。
适用场景
需要用户注册、登录、匿名登录、验证码登录
需要 PostgreSQL 表级增删改查
需要上传下...
How to ignore xargs commands if stdin input is empty?
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@wedi - OSX has BSD userspace, so this sort of thing will happen frequently. You can work around it by using homebrew to install the GNU fileutils.
– edk750
Jul 20 '16 at 19:41
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Is it worthwile to learn assembly language? [closed]
...thermore, the conventional wisdom is to not try to hand-optimise assembly most of the time but let the compiler worry about it. When you see some examples of the twisted things that compilers generate, you will better understand why the conventional wisdom holds.
Example: LFSRs run fast with the ro...
How to create a file with a given size in Linux?
For testing purposes I have to generate a file of a certain size (to test an upload limit).
13 Answers
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How do I parse XML in Python?
...e number in the XML source, etc. that can be very useful in several scenarios.
– Saheel Godhane
Jan 21 '15 at 22:23
13
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How to create a file in memory for user to download, but not through server?
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This is not a cross browser solution but definitely something worth looking at. For example IE limits support to data uri. IE 8 limits size to 32KB and IE 7 and lower doesn't support at all.
– Darin Dimitrov
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EXC_BAD_ACCESS signal received
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From your description I suspect the most likely explanation is that you have some error in your memory management. You said you've been working on iPhone development for a few weeks, but not whether you are experienced with Objective C in general. If you've come...