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How can I convert a string to a number in Perl?
I have a string which holds a decimal value in it and I need to convert that string into a floating point variable. So an example of the string I have is "5.45" and I want a floating point equivalent so I can add .1 to it. I have searched around the internet, but I only see how to convert a string t...
Why is “origin/HEAD” shown when running “git branch -r”?
...igin/HEAD will point at that.
On GitHub, You can change this in the Admin settings for your GitHub repo. You can also do it from the command-line via
git remote set-head origin trunk
or delete it altogether via
git remote set-head origin -d
Example. Look at the 'Switch Branches' drop-down. tr...
What is the difference between String.slice and String.substring?
...gt; stop, slice() will return the empty string. ("")
If start is negative: sets char from the end of string, exactly like substr() in Firefox. This behavior is observed in both Firefox and IE.
If stop is negative: sets stop to: string.length – Math.abs(stop) (original value), except bounded at 0 (...
creating a random number using MYSQL
...t to a variable and use the variable if you have master slave replication. SET @r=FLOOR(RAND() * 401) + 100, then SELECT @r.
– Qian Chen
Mar 23 '16 at 6:55
3
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How do I read an entire file into a std::string in C++?
How do I read a file into a std::string , i.e., read the whole file at once?
15 Answers
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Use HTML5 to resize an image before upload
...sizeImageOptions {
maxSize: number;
file: File;
}
const resizeImage = (settings: IResizeImageOptions) => {
const file = settings.file;
const maxSize = settings.maxSize;
const reader = new FileReader();
const image = new Image();
const canvas = document.createElement('canvas');
con...
Opposite of %in%: exclude rows with values specified in a vector
A categorical variable V1 in a data frame D1 can have values represented by the letters from A to Z. I want to create a subset D2, which excludes some values, say, B, N and T. Basically, I want a command which is the opposite of %in%
...
How to sort my paws?
...this answer, but I need to elaborate a bit on some things... (Though I may set a record for the longest non-spam stackoverflow answer ever!)
As a side note, I'm using the full dataset that Ivo provided a link to in his original question. It's a series of rar files (one-per-dog) each containing sev...
C/C++中的段错误（Segmentation fault） - C/C++ - 清泛网 - 专注C/C++及内核技术
C/C++中的段错误（Segmentation fault）Segment fault 之所以能够流行于世，是与Glibc库中基本上所有的函数都默认形参指针为非空有着密切关系的。目录1。什么是段错误？2。为什 Segment fault 之所以能够流行于世，与Glibc库中基本上所有...
Cannot find or open the PDB file in Visual Studio C++ 2010
...l to easily get there.
Go to Tools->Options->Debugging->Symbols
Set the checkbox marked in red and it will download the pdb files from microsoft. When you set the checkbox, it will also set a default path for the pdb files in the edit box under, you don't need to change that.
...