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A variable modified inside a while loop is not remembered
...=0;i<${#arr[*]};++i)) { line=${arr[i]};
...
}
Variable $lines can be converted to an array without starting a new sub-shell. The characters \ and n has to be converted to some character (e.g. a real new line character) and use the IFS (Internal Field Separator) variable to split the string int...
In javascript, is an empty string always false as a boolean?
...ly, when the operands of == have different types, JavaScript tries hard to convert them to Numbers, according to their value, (using operations the standard calls ToNumber and ToPrimitive), and then it internally applies ===. But when you use === directly, the types are not converted, so comparing ...
Array to String PHP?
What is the best method for converting a PHP array into a string?
I have the variable $type which is an array of types.
...
位置传感器经纬度为0的问题 - 用户反馈 - 清泛IT社区，为创新赋能！
...丶:
想问下appinventor位置传感器调试一直是0,0是为什么
清泛:
[图片]
清泛:
看看是不是权限问题
Pursuer丶:
是这样的
Pursuer丶:
他刚进来的时候是好的 然后跳到第二个屏幕 再返回第一个 就变0,0了
Pursuer丶:
一开始初...
Why is === faster than == in PHP?
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Because the equality operator == coerces, or converts, the data type temporarily to see if it’s equal to the other operand, whereas === (the identity operator) doesn’t need to do any converting whatsoever and thus less work is done, which makes it faster.
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What's the best CRLF (carriage return, line feed) handling strategy with Git?
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Don't convert line endings. It's not the VCS's job to interpret data -- just store and version it. Every modern text editor can read both kinds of line endings anyway.
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Double exclamation points? [duplicate]
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This converts a value to a boolean and ensures a boolean type.
"foo" // Evaluates to "foo".
!"foo" // Evaluates to false.
!!"foo" // Evaluates to true.
If foo.bar is passed through, then it may not be 0 but some oth...
What is the difference between JSF, Servlet and JSP?
...st/response work from your hands, such as gathering user input, validating/converting them, putting them in model objects, invoking actions and rendering the response. This way you end up with basically a JSP or Facelets (XHTML) page for View and a JavaBean class as Model. The JSF components are use...
HTML5 Canvas Resize (Downscale) Image High Quality?
...sCtx.getImageData(0, 0, tw, th);
var tByteBuffer = imgRes.data;
// convert float32 array into a UInt8Clamped Array
var pxIndex = 0; //
for (sIndex = 0, tIndex = 0; pxIndex < tw * th; sIndex += 3, tIndex += 4, pxIndex++) {
tByteBuffer[tIndex] = Math.ceil(tBuffer[sIndex]);...
Creating a BLOB from a Base64 string in JavaScript
...gth; i++) {
byteNumbers[i] = byteCharacters.charCodeAt(i);
}
You can convert this array of byte values into a real typed byte array by passing it to the Uint8Array constructor.
const byteArray = new Uint8Array(byteNumbers);
This in turn can be converted to a BLOB by wrapping it in an array ...