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MFC 设置控件字体，颜色，大小，粗体，下划线等 - C/C++ - 清泛网 - 专注C/...
MFC 设置控件字体，颜色，大小，粗体，下划线等参考代码：CFont *f = new CFont; f->CreateFont(16, nHeight 0, nWidth ...参考代码：
CFont *f = new CFont;
f->CreateFont(16, // nHeight
0, // nWidth
0, // nEsca...
2023年1月9日签到记录贴 - 灌水吐槽、新手试贴 - 清泛IT论坛，有思想、有深度
...09 10:16 完成签到,是今天第一个签到的用户,获得随机奖励 F币 16,另外我还额外获得了 F币 10.我今天最想说:「O(∩_∩)O哈哈~」. 我在 2023-01-09 11:22 完成签到,是今天第2个签到的用户,获得随机奖励 F币 8,另外我还额外获得了 F币 9我今...
Error handling in C code
... your library as painless as possible think about these additions:
store all possible error-states in one typedef'ed enum and use it in your lib. Don't just return ints or even worse, mix ints or different enumerations with return-codes.
provide a function that converts errors into something huma...
How can I check if a file exists in Perl?
...
Test whether something exists at given path using the -e file-test operator.
print "$base_path exists!\n" if -e $base_path;
However, this test is probably broader than you intend. The code above will generate output if a plain file exists at that path, but it will also fire for ...
How to determine if binary tree is balanced?
... some fraction of the minimum path length, like a half or a quarter.
It really doesn't matter usually. The point of any tree-balancing algorithm is to ensure that you do not wind up in the situation where you have a million nodes on one side and three on the other. Donal's definition is fine in the...
How do I write the 'cd' command in a makefile?
For example, I have something like this in my makefile:
6 Answers
6
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Check if a string matches a regex in Bash script
...pattern.
For your specific case, you can write:
[[ $date =~ ^[0-9]{8}$ ]] && echo "yes"
Or more a accurate test:
[[ $date =~ ^[0-9]{4}(0[1-9]|1[0-2])(0[1-9]|[1-2][0-9]|3[0-1])$ ]] && echo "yes"
# |^^^^^^^^ ^^^^^^ ^^^^^^ ^^^^^^ ^^^^^^^^^^ ^^^^^^ |
# | | ^^^...
How to set Oracle's Java as the default Java in Ubuntu?
...of the JVM, you don't need to update your .bashrc file, it should automatically point to the new version.
If you want to set JAVA_HOME environment variables globally and at system level means use should set in /etc/environment file.
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Coffeescript — How to create a self-initiating anonymous function?
How to write this in coffeescript?
8 Answers
8
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What tools are there for functional programming in C?
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FFCALL lets you build closures in C -- callback = alloc_callback(&function, data) returns a function pointer such that callback(arg1, ...) is equivalent to calling function(data, arg1, ...). You will have to handle garbage collection manually, though.
Relatedly, blocks have been added...