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EntityType has no key defined error
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Lots of different things can cause this error. In my case, I mistakenly marked my "Id" field "private" instead of "public" (a habit from Java/JPA). Larry Raymond's response below is arguably the "best" reply to this question. It li...
How to print the ld(linker) search path
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You can try to manually specify library paths with the -L option to GCC, which I think (not sure) will override the system library paths. You could also try to set the LIBRARY_PATH env variable before compiling: $ LIBRARY_PATH=/somedir/ gcc ...
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Try catch statements in C
...tjmp and longjmp calls.
static jmp_buf s_jumpBuffer;
void Example() {
if (setjmp(s_jumpBuffer)) {
// The longjmp was executed and returned control here
printf("Exception happened here\n");
} else {
// Normal code execution starts here
Test();
}
}
void Test() {
// Rough eq...
Best way to simulate “group by” from bash?
...ick and dirty method is as follows:
cat ip_addresses | sort -n | uniq -c
If you need to use the values in bash you can assign the whole command to a bash variable and then loop through the results.
PS
If the sort command is omitted, you will not get the correct results as uniq only looks at succ...
Unable to add window — token android.os.BinderProxy is not valid; is your activity running?
...re showing the dialog for a context that no longer exists. A common case - if the 'show dialog' operation is after an asynchronous operation, and during that operation the original activity (that is to be the parent of your dialog) is destroyed. For a good description, see this blog post and comment...
C++ deprecated conversion from string constant to 'char*'
...ng:
char* pointer_to_nonconst = "string literal";
Why? Well, C and C++ differ in the type of the string literal. In C the type is array of char and in C++ it is constant array of char. In any case, you are not allowed to change the characters of the string literal, so the const in C++ is not real...
How can I read numeric strings in Excel cells as string (not numbers)?
...system locale, it always uses the dot as a decimal separator. For example, if your system uses ",", and in Excel numbers look like "1,9", POI will return "1.9" instead.
– Alexey Berezkin
Jan 25 '13 at 10:39
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No startswith,endswith functions in Go?
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StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
...
Get div height with plain JavaScript
...unction. Please note that getBoundingClientRect will return an empty rect if the element's display is 'none'.
Example:
var elem = document.getElementById("myDiv");
if(elem) {
var rect = elem.getBoundingClientRect();
console.log("height: " + rect.height);
}
UPDATE:
Here is the same code writt...
Linq list of lists to single list
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StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
...