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Bash script prints “Command Not Found” on empty lines
...you usually just need to look at the command output immediately before the error to see what's causing the problem
If, as you say, it's the blank lines causing the problems, you might want to check what's actaully in them. Run:
od -xcb testscript.sh
and make sure there's no "invisible" funny cha...
What is the optimal length for an email address in a database?
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edited May 8 '14 at 7:05
answered May 7 '14 at 11:47
What would be C++ limitations compared C language? [closed]
...D_POSIX_C_SOURCE=200112L -Wall -Wextra -Wwrite-strings -Wredundant-decls -Werror -Isrc src/core/kin_object.c -c -o obj/kin_object.o | wc -l
In file included from src/core/kin_object.c:22:
src/core/kin_object.h:791:28: error: anonymous variadic macros were introduced in C99
In file included from src...
Way to get all alphabetic chars in an array in PHP?
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answered Jan 10 '09 at 23:05
PEZPEZ
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新手程序员应该知道的7件事 - 创意 - 清泛网 - 专注C/C++及内核技术
...候，对于计算机我有很多不明白的地方。文件系统，网络连接以及内存机制就是三个明显的例子。不了解这些，意味着我可能会不知道一些我想要呈现的编程结构的目标。”
2、知道命令行工具
作为一个开发人员，你必然需要...
What is “rvalue reference for *this”?
...-value. So if this is in the type Object:
Object foo;
foo.RValueFunc(); //error: no `RValueFunc` version exists that takes `this` as l-value.
Object().RValueFunc(); //calls the non-const, && version.
This way, you can specialize behavior based on whether the object is being accessed via a...
How to only find files in a given directory, and ignore subdirectories using bash
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If you just want to limit the find to the first level you can do:
find /dev -maxdepth 1 -name...
How can I check if a directory exists in a Bash shell script?
...INK"
if [ -d "$SYMLINK" ]; then
rmdir "$SYMLINK"
fi
Will produce the error message:
rmdir: failed to remove `symlink': Not a directory
So symbolic links may have to be treated differently, if subsequent commands expect directories:
if [ -d "$LINK_OR_DIR" ]; then
if [ -L "$LINK_OR_DIR" ]...
SQL - HAVING vs. WHERE
...the [country] filtering to the WHERE has you've suggested, the query would error from SELECT [country], as [country] is no longer included in the GROUP BY aggregation, thus cannot be selected.
– Nhan
Nov 8 '19 at 22:40
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Making WPF applications look Metro-styled, even in Windows 7? (Window Chrome / Theming / Theme)
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– FlyingMaverick
May 12 '14 at 19:05
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