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Best way to check for “empty or null value”
What is best way to check if value is null or empty string in Postgres sql statements?
10 Answers
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Delete element in a slice
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@Tyguy7 from the spec: "For arrays or strings, the indices are in range if 0 <= low <= high <= len(a), otherwise they are out of range." Maybe in your case high < low; in that case you'll get the error. (golang.org/ref/spec#Slice_expressions)
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Is there a way to specify how many characters of a string to print out using printf()?
Is there a way to specify how many characters of a string to print out (similar to decimal places in int s)?
8 Answers
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What function is to replace a substring from a string in C?
Given a ( char * ) string, I want to find all occurrences of a substring and replace them with an alternate string. I do not see any simple function that achieves this in <string.h> .
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Length of string in bash
How do you get the length of a string stored in a variable and assign that to another variable?
8 Answers
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Take a char input from the Scanner
...seDelimiter("");
After this reader.next() will return a single-character string.
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How do I apply the for-each loop to every character in a String?
So I want to iterate for each character in a string.
9 Answers
9
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MIN and MAX in C
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@Makouda: Extra parentheses in macros help to avoid operator precedence problems. For example, consider #define MULT(x, y) x * y. Then MULT(a + b, a + b) expands to a + b * a + b, which parses as a + (b * a) + b due to precedence. T...
Mapping many-to-many association table with extra column(s)
...ments java.io.Serializable{
private ACId id = new ACId();
private String extra;
public AC(){
}
public ACId getId() {
return id;
}
public void setId(ACId id) {
this.id = id;
}
public A getA(){
return getId().getA();
}
public C...
How can I programmatically get the MAC address of an iphone
... to use it
InitAddresses();
GetIPAddresses();
GetHWAddresses();
int i;
NSString *deviceIP = nil;
for (i=0; i<MAXADDRS; ++i)
{
static unsigned long localHost = 0x7F000001; // 127.0.0.1
unsigned long theAddr;
theAddr = ip_addrs[i];
if (theAddr == 0) break;
if (theAddr...